Network Security
system security Linux network
system security Linux network The romanticized image of the digital nomad – a laptop on a sun-drenched balcony – rarely accounts for the actual friction of maintaining a professional development environment on the move. . The friction is amplified with Linux. We are looking for a setup that respects our kernel configurations, handles volatile network handovers, and maintains a strict security posture without the hand-holding of a consumer-grade OS – so, put simply, more than just a laptop and a sunny deck. The hardware is...
May 26, 2026
Server Securityopen-source Linux administration
open-source Linux administration Cron has existed in Unix and Linux environments for decades, handling backups, cleanup scripts, patching jobs, log rotation, monitoring tasks, and other maintenance work that administrators do not want to run manually. Most Linux servers rely on it constantly, which is exactly why attackers continue abusing it for persistence after a system has already been compromised. . Persistence through cron is not complicated. Attackers do not need a rootkit or advanced malware framework to maintain...
May 25, 2026
Vendors/Productssecurity breach linux
security breach linux A major internal repository breach at GitHub has exposed a critical and overlooked blind spot in Linux supply chain security. Kernel exploits, exposed SSH services, weak firewall rules, and vulnerable daemons dominated the Linux threat model for years, and in many environments, they still matter. But recent supply-chain incidents involving GitHub ecosystems, npm packages, and malicious developer tooling point somewhere else entirely: the developer workstation. . The breach matters because...
May 21, 2026
Security Trends access control multi-tenant
access control multi-tenant Linux administrators often face an ugly choice in the cloud: prioritize convenience and cost-efficiency by sharing infrastructure, or sacrifice those benefits for the sake of total isolation. Most modern Linux workloads don't live on their own private servers anymore. They live in shared environments like Kubernetes clusters, where multiple teams and services run side-by-side. It sounds efficient, and it usually is. . But cloud isolation isn't as ironclad as it looks on the diagram. If you...
May 21, 2026
Vendors/Productsincident response cloud security
incident response cloud security Managed Extended Detection and Response (MXDR) has become one of the most sought-after security services in the enterprise market — and with good reason. It promises the holy grail: broad visibility across endpoints, network, cloud, email, and identity, combined with the 24/7 human expertise most organizations simply cannot build in-house. . However, the rapid growth of the market has produced a wide range of providers whose capabilities vary considerably beneath the surface. Choosing the...
May 19, 2026
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security advisoryimportantmemory managementOracle Linux 9: UEK 8 important: Secure Networking & Memory Updates
Oracle’s latest Unbreakable Enterprise Kernel ( UEK 8 ) release delivers various innovations tailor-made for Linux admins focused on enhancing security, performance, and reliability. Packed with advanced memory management, enhanced file system support, and powerful networking optimizations, UEK 8 is designed to meet the evolving needs of enterprise workloads. For security-minded admins, the kernel’s new features—such as Intel SGX2 for secure enclave memory and updates to BPF for safer kernel modifications—offer robust defenses against modern vulnerabilities while ensuring scalability for high-performance environments. . Failing to upgrade could mean missing out on critical benefits, such as improved file system reliability, reduced risk of data corruption, and dynamic memory protections for sensitive workloads. The upgrade process is streamlined for Oracle Linux 9 users, making it easier than ever to adopt the latest security advancements. If staying ahead of threats while optimizing your infrastructure is a priority, UEK 8 is a must-have addition to your toolkit. Now’s the time to activate these features and strengthen your enterprise’s foundation! In this article, I'll explore the new features of UEK 8 that are especially relevant for Linux security administrators. From advanced memory management to enhanced file system reliability and breakthrough networking capabilities, I’ll discuss how UEK 8 enables tighter security controls and greater operational efficiency in enterprise environments. Secure Your Workloads with Advanced Memory Management One standout feature of UEK 8 is its memory management enhancements, particularly through support for Intel's Software Guard Extensions 2 (SGX2). SGX2 technology creates secure enclaves within memory to protect data, even if other parts of the system become compromised. This offers immense potential value to Linux security professionals working in cloud environments or managing sensitive data, such as financial records or customer details.For these individuals, this technology could prove nothing short of transformational! Administrators can take advantage of SGX2 integration within Oracle's kernel to leverage hardware-level security and isolate critical processes, including encryption keys, authentication routines, and sensitive algorithm calculations. These processes run entirely within secure enclaves, reducing the risks of data leakage or exposure to attacks. While previous versions did not feature this level of protection as readily, UEK 8 puts it front and center as an efficient way to mitigate vulnerabilities head-on. Furthermore, these memory protections are implemented efficiently to ensure security doesn't compromise system performance. Administrators who must balance multiple performance demands while adhering to stringent security protocols will find that UEK 8's SGX2 implementation strikes a balance between robustness and speed. Reducing Risks of Data Corruption with File System Reliability File system reliability has long been a cornerstone of enterprise Linux security, and UEK 8 further strengthens this critical area by improving support for modern file systems. The new kernel brings refinements to ext4, Btrfs, and other popular file systems, introducing stability improvements to minimize risks like data corruption, system crashes, or unexpected performance bottlenecks. These enhancements are incredibly useful for environments where data integrity is paramount—think big data processing, database servers, or backup and recovery solutions . Admins can now implement file systems more confidently and reliably under heavy I/O demands or during unforeseen hardware errors. UEK 8 ensures that file operations are not just faster but also safer, so you can focus on scaling your systems without worrying about critical failures. Additionally, these improvements to file system handling extend to compatibility and flexibility. If your infrastructure includes legacy systems or mixed workloads that span different storagetypes, UEK 8 smooths the integration process, ensuring seamless operation across various file management setups. Networking Optimizations for Better Security and Scalability Networking remains another key focus area of UEK 8. The kernel introduces significant upgrades to networking support, including more efficient queuing models and improved handling of packet processing for high-throughput systems. These improvements benefit us, security administrators, by reducing the risk of misconfigurations or vulnerabilities within the networking stack and enabling us to scale our infrastructure to handle larger traffic loads. Administrators responsible for managing firewalls, intrusion detection systems, and VPNs will appreciate the updated networking features in UEK 8. Better protocol handling can mean faster processing times for encrypted traffic, tighter coordination between network layers, and reduced latency when routing packets. In security-sensitive environments, every millisecond counts, and UEK 8 ensures smoother operations, even under peak loads. Regarding flexibility, UEK 8 supports the extended Berkeley Packet Filter (BPF) , which offers a safer way to modify kernel behavior on the fly. BPF has become increasingly popular for writing custom monitoring tools or network filters directly within the kernel. With UEK 8’s enhanced implementation, admins have a powerful yet secure toolset to craft solutions tailored to their infrastructure's unique challenges while reducing the risk of introducing vulnerabilities. Performance Gains with Core Updates Of course, we security admins know that performance is tightly intertwined with security requirements. A sluggish or overloaded system is often more vulnerable due to delays in applying updates, increased attack surfaces, or reduced administrator visibility. This is where UEK 8’s optimizations in core areas, such as scheduling, virtual memory, and multicore CPU support, come in. The kernel has been designed to ensure that both traditionalworkloads and container-based deployments benefit from improved resource allocation. Security admins deploying distributed systems or virtualized workloads will especially notice the performance boost, which allows them to process larger workloads with fewer bottlenecks. Oracle has optimized UEK 8 to handle diverse operational environments, from lightweight virtual machines to heavily loaded production servers running critical processes. With UEK 8, admins can focus more on long-term planning and proactive security measures rather than spending excessive time troubleshooting systems that have been pushed to their limits. Why Upgrade to UEK 8 Now? Given all these advancements, some may wonder why it's time to upgrade to UEK 8 , especially since existing systems appear stable. The answer is straightforward: sticking with older kernel versions could expose your systems to vulnerabilities or performance limitations. Security threats evolve quickly, and the tools required to mitigate them must evolve in tandem. Additionally, UEK 8 has been streamlined for easier deployment on Oracle Linux 9 environments. Oracle has significantly focused on making the upgrade process less intrusive, so admins can implement the kernel without extended downtime or excessive changes to their existing setup. This ease of adoption is critical for those operating high-availability systems that cannot afford prolonged migrations. With UEK 8, staying ahead of threats goes hand in hand with operational efficiency. The kernel introduces features that enhance security and elevate system performance, making it a win-win for administrators tasked with securing enterprise Linux environments. Our Final Thoughts on Enhancing Security with UEK 8 Oracle Linux UEK 8 is more than just a kernel upgrade—it’s a smart investment in the future of your enterprise’s infrastructure. The advanced memory management features, improved file system reliability, and cutting-edge networking optimizations make it a must-have forsecurity-conscious Linux admins. Whether deploying in cloud environments, managing sensitive databases, or scaling systems to handle dynamic workloads, UEK 8 offers the tools you need to confidently secure and optimize your operations. As threats evolve and enterprise demands increase, sitting on older versions is no longer an option. UEK 8 simplifies the upgrade path for Oracle Linux 9 users, making it easier than ever to adopt these powerful capabilities. Now is the perfect time to strengthen your infrastructure, boost performance, and take your security posture to the next level by uppgrading to UEK 8! . Ignoring updates for Oracle Linux UEK 8 may result in security risks and reduced performance. Update your systems now!. Oracle Linux, UEK 8, memory management, networking optimizations, system performance. . Brittany Day
Apr 16, 2025
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Vendors/Products
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network securitysecurity enhancementmemory managementLinux Kernel 6.13: Exciting Security Features for Admins this Holiday
As Linux admins and infosec professionals prepare for the holiday season, there's much cause for celebration this year! Linus Torvalds recently made headlines when he unveiled the initial release candidate of Linux Kernel 6.13 (6.13-rc1) on December 1, 2024. Its final version is due for a mid-to-late January 2025 release. This gives ample opportunity for testing, resource planning, and resource allocation during an otherwise slower season. . Not only was the merge window completed smoothly, ensuring stability during development, but this release also promises many security enhancements essential in protecting systems against increasingly sophisticated cyber threats and defend against vulnerabilities . In this article, I'll examine the significance of this exciting release and how it will gift you a stronger Linux security posture this holiday season! Favorable Timing One of the stand-out aspects of Linux Kernel 6.13 is its timing with the holiday season. Linus Torvalds noted its significance in his announcement to the Linux Kernel Mailing List , noting how this release cycle avoided year-end clashes that usually lead to hastened and subpar development processes. As such, developers could focus on stabilizing 6.13 without feeling pressure from holiday rushes during development cycles, creating a smoother trajectory for future development cycles. Torvalds recently mentioned the holiday break as another positive factor for future releases - an opportunity for relaxation among developers that might result in more focused releases with better refinement and focus. Release Candidate Availability Testing begins in full swing once the release candidate (6.13-rc1) arrives. This period allows developers and security professionals to identify and fix bugs, ensuring a robust release in the final version. In this phase, administrators and security professionals test it against their systems to prepare a seamless transition when the final version arrives. Development cycles that coincide withholidays offer extended testing and optimization windows, which should generally contribute to more stable and reliable releases. This mainly benefits security communities, allowing thorough evaluations of new security features or updates. Successful Merge Process Completing the merge window without significant issues is more evidence of Linux Kernel 6.13's smooth development process. A seamless merge process ensures overall stability and reliability for its final release and smooth integration of new features or updates. This cycle brings updates across multiple subsystems, from updates to Virtual File System (VFS), driver, architecture-specific improvements for ARM64, x86, and RISC-V architectures, as well as core kernel components like memory management and scheduling to memory updates that demonstrate its value in overall stability and performance of kernel. Torvalds noted more core VFS changes than usual during this cycle, underscoring their significance to overall kernel stability and performance. Security Enhancements We Linux admins view new kernel releases with great interest because of the security enhancements they often bring. Linux Kernel 6.13 includes several critical updates to increase resilience against vulnerabilities and attacks. Notable security enhancements in Linux Kernel 6.13 include: Improved Memory Management Proper management of available memory is central to system stability and security. Linux 6.13 updates have enhanced core memory components to maximize efficiency while mitigating any possible buffer overflow vulnerabilities or memory corruption vulnerabilities that might compromise them. These core memory components use more available space while decreasing security breach risks. Efficient Scheduling Updates to the kernel's scheduling mechanisms have proven instrumental in increasing system performance and security. Efficient scheduling ensures processes have equitable access to system resources while mitigating DoS attacks and improving overall systemresponsiveness. File System Security Linux Kernel 6.13 includes updates for several file systems, such as Btrfs, XFS, and F2FS, that strengthen security and reliability by protecting data integrity while restricting unauthorized access - an essential safeguard in keeping confidential files private and preventing breaches in data confidentiality. Network and Virtualization Security Additionally, this release features improvements to networking and virtualization (KVM) components. Network security enhancements help protect systems against network-based attacks, and updates to virtualization components ensure virtual environments remain isolated to avoid spreading attacks between virtual machines. Rust Support in the Kernel A particularly notable update in Linux 6.13 is the continued inclusion of the Rust programming language . Rust is widely known for its emphasis on safety and concurrency, making it an excellent language for writing secure kernel code. Updates such as Rust file abstractions and PID namespace bindings provide steps towards further embedding Rust into our Linux systems, potentially leading to safer systems in the future. Our Final Thoughts on the Security Improvements in Linux Kernel 6.13 The release of Linux Kernel 6.13 marks an exciting event in the Linux community this holiday season. Security improvements made possible through Linux Kernel 6.13 are paramount in protecting systems against emerging threats, with enhancements in memory management, scheduling, file system security, networking virtualization, and Rust support all providing greater resilience. As is always the case for Linux advancements, collaborative efforts within its community drive them, helping keep Linux at the cutting edge of operating system technology. With the release of Linux Kernel 6.13, the community continues its commitment to innovation and security and provides a critical update for administrators and infosec professionals. As always, be diligent and ensure your systems can use the newsecurity enhancements introduced with Linux Kernel 6.13. These updates are essential in maintaining a robust Linux infrastructure heading into 2025. What are you most excited about in this release? Reach out to us @lnxsec and let's chat about it! . Dive into Linux Kernel version 6.13, showcasing enhanced security features, sophisticated memory management, bolstered network protections, and the integration of Rust for safer programming.. Linux Kernel 6.13, security updates, Rust integration, network protection, kernel enhancements. . Brittany Day
Dec 02, 2024
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Security Projects
78
network securitysecurity best practicesmemory managementWSL Updates for May 2024: Enhancements and Security Best Practices
WSL (Windows Subsystem for Linux) , Microsoft's network security toolkit that allows users to run Linux natively on Windows without needing a dual-boot setup, underwent significant enhancements and updates in May 2024 . These changes bring numerous security and user experience benefits. . Let's examine the changes made to WSL and discuss security best practices you can easily implement to improve its security further. What Changes Has Microsoft Made to WSL This Month? Alongside improvements in memory, storage, and networking capabilities, a new WSL Settings GUI application has been introduced to simplify customizing and managing settings. With Zero Trust enabled in WSL, enhanced security measures include Microsoft Defender for Endpoint support and secure authentication with Entra ID integration. Dev Home now also allows users to manage WSL distros, launch development environments, and utilize features like Sudo for Windows and an AI-powered quickstart playground, providing Linux admins with enhanced functionality, security, and an overall better development experience. These updates give Linux administrators increased functionality and provide a better user experience. Let's explore these recent changes in mode detail: Memory, Storage, and Networking Improvements: Improvements have been implemented for memory management, storage space reclamation, and networking support. These improvements include automatically releasing stored memory back to Windows and setting default settings for memory reclamation, plus enhanced networking features. WSL Settings GUI Application: The WSL Settings GUI will soon be unveiled. It will simplify the customization and management of settings within WSL. With labeled categories for settings, this interface should simplify configuring configurations for end-users. WSL Zero Trust: The Windows Subsystem for Linux now operates under Zero-Trust principles , and new features and support have been introduced to provide additional securitybenefits to enterprises using WSL. These include Defender for Endpoint support for WSL 2, Linux Intune agent integration to manage settings, and Microsoft Entra ID integration for authentication purposes. Dev Home Environments feature: Environments is a new feature within Dev Home that allows users to manage, launch, and create development environments, including WSL distros, within the Dev Home platform, further enriching the development experience. Bonus Improvements: Additional enhancements include the introduction of 'Sudo for Windows,' which allows users to utilize sudo commands in Windows for certain commands that use sudo privileges. Furthermore, an AI-powered quickstart playground feature within Dev Home enables users to set up Linux development environments using AI-generated prompts quickly. Practical Advice for Strengthening WSL Security WSL users have the convenience of accessing Linux through the cloud or a Windows computer instead of a Linux desktop, but doing so opens up more attack surfaces for malicious hackers. While the recent updates made to WSL will improve admins' and developers' experience and security, there are several best practices we recommend implementing to bolster your security further when using WSL: Update all the apps in your custom virtual image to the latest versions. Use a disaster recovery and business continuity strategy to protect your data during unforeseeable outages. Protect your network from threats using anti-malware software from reputable vendors. Use JIT VM access (just-in-time) to restrict traffic entering management ports. Create network security groups and set up rules to govern the screen traffic so that you can quickly address cybersecurity vulnerabilities. Install Microsoft Defender for Endpoint , which uses behavioral sensors to collect behavioral signals and analyze them. MDE alerts Microsoft analysts when it detects threats. They analyze the risks and offer remediation measures. You must usuallydisconnect the compromised devices while maintaining a connection with MDE to monitor your server. Our Final Thoughts on the Recent Changes Made to WSL The recent changes Microsoft has made to WSL are significant and will greatly improve users' and developers' experience and level of security using WSL. By engaging in the practical tips and security best practices we've discussed, users can further bolster the security of their WSL environment to protect against vulnerabilities and exploits. For more practical Linux security tips, information, and updates, be sure to subscribe to our Linux Security Week and Linux Advisory Watch newsletters . Stay safe out there, WSL users! . Delve into the latest updates in WSL and discover actionable security measures to elevate your Linux functionality on Windows today.. Windows Subsystem for Linux, WSL security enhancements, Linux security improvements. . Dave Wreski
May 31, 2024
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Vendors/Products
210
security advisorycriticalprivilege escalationLinux Kernel: 6.1-6.4 Critical Advisory for StackRot Exploit
Exploit code will soon become available for a critical vulnerability in the Linux kernel that a security researcher discovered and reported in mid-June. Dubbed StackRot (CVE-2023-3269), this bug impacts the Linux kernel 6.1 through 6.4. The data structure for managing virtual memory spaces in the Linux kernel handles a particular memory management function in a manner that results in use-after-free-by-RCU (UAFBR) issues. The security researcher who discovered StackRot, Ruihan Li, describes the exploit for StackRot as likely the first to successfully exploit a UAFBR bug. . This flaw gives attackers a way to escalate privileges on affected systems. Important updates for the kernel that mitigate this severe vulnerability have been released. With a low attack complexity and a high confidentiality, integrity and availability impact, it is crucial that all impacted users apply the Linux kernel updates issued by their distro(s) immediately to protect against attacks leading to system downtime and compromise. To stay on top of important updates released by the open-source programs and applications you use, be sure to register as a LinuxSecurity user , then subscribe to our Linux Advisory Watch newsletter and customize your advisories for the distro(s) you use. This will enable you to stay up-to-date on the latest, most significant issues impacting the security of your systems. Follow @LS_Advisories on Twitter for real-time updates on advisories for your distro(s) . . This vulnerability allows malicious actors to gain elevated permissions on compromised machines. Critical patches are now accessible.. Linux Kernel Exploit, StackRot Vulnerability, Privilege Escalation Fix, Memory Management Flaw. . Brittany Day
Jul 13, 2023
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Security Vulnerabilities
210
security advisoryhigh severitysoftware updateVim Security Advisory: High DoS Risk and Code Execution Issues
Several important security issues were discovered in the Vim enhanced vi editor, including an out-of-bounds read vulnerability (CVE-2022-0128), improper memory management when recording and using select mode (CVE-2022-0393), and incorrect handling of certain memory operations during a visual block yank (CVE-2022-0407). Due to their high confidentiality, integrity and availability impact, these bugs have received a National Vulnerability Database severity rating of High. . An attacker could possibly use these issues to cause a denial of service (DoS) or execute arbitrary code. An update for Vim that fixes these flaws is now available. We strongly recommend that all impacted users apply the Vim updates issued by their distro(s) immediately to prevent downtime or compromise due to an attack. To stay on top of important updates released by the open-source programs and applications you use, be sure to register as a LinuxSecurity user , then subscribe to our Linux Advisory Watch newsletter and customize your advisories for the distro(s) you use. This will enable you to stay up-to-date on the latest, most significant issues impacting the security of your systems. Follow @LS_Advisories on Twitter for real-time updates on advisories for your distro(s) . . Critical vulnerabilities in Vim present a Denial of Service threat and may allow unauthorized code execution; ensure to implement updates promptly to address these risks.. Vim Security Update, DoS Risk, Memory Management Issues, Linux Vulnerabilities. . Brittany Day
Jul 13, 2023
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Security Vulnerabilities
79
memory managementkernel patchesvirtual machinesIntel Memory Support Updates: Faster Boot Times for TDX VMs
Way back in August Intel posted a set of Linux kernel patches for supporting "unaccepted memory" by the Linux kernel in preparation for next-generation Xeon processors and speeding up the boot time for guest virtual machines making use of Intel's Trust Domain Extensions (TDX) security feature. Unaccepted memory support hasn't yet made it to the mainline kernel but now a second iteration of the patches have been posted. . UEFI 2.9 introduces the concept of memory acceptance and unaccepted memory. This makes it so guests need to "accept" memory before it can be allocated/used within the guest's environment while the actual acceptance handling is depending upon the VM hypervisor. This memory acceptance is important for Intel TDX and AMD SEV-SNP to avoid the expensive memory acceptance at boot time for new VMs and to instead make it on-demand / as-needed. It's also possible to be a security benefit in its own right by keeping the memory unaccepted until it's actually going to be used. The link for this article located at Phoronix is no longer available. . Intel's revisions for unsupported memory seek to improve virtual machine startup times and fully utilize TDX security capabilities.. Intel Memory Management, VM Performance, TDX Security Features. . LinuxSecurity.com Team
Jan 21, 2022
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Security Projects
79
memory managementlinux kernelopen source developmentLinux Integrates Rust For Improved Stability And Memory Safety
Linux is getting more Rust in it by the day! Why? Because it's more stable and much safer than C - especially at handling memory errors. . It wasn't that long ago that the very idea that another language besides C would be used in the Linux kernel would have been laughed at. Things have changed. Today, not only is Rust , the high-level system language moving closer to Linux, it's closer than ever with thenext "patch series to add support for Rust as a second language to the Linux kernel." The biggest change in these new packages is that the Rust code proposed for the kernel now relies on the stable Rust compiler rather than the beta compilers. Going forward, Rust on Linux will be migrating every time a new stable Rust compiler is released. Currently, it's using Rust 1.57.0 . . Go is becoming a significant language for Linux, improving concurrency and efficiency compared to C.. Rust Programming, Linux Kernel Support, Memory Error Handling, System Languages, Open Source Development. . LinuxSecurity.com Team
Dec 10, 2021
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Security Projects
78
security advisorybrowsermemory managementFirefox 6 Beta Offers Security Upgrades and Tablet Enhancements
The latest Firefox beta jumps to version 6 and lands with improvements made to security, tablet appearance, memory management, and Android fixes. Download for Windows, Mac, Linux, and Android, Firefox 6 beta comes with a laundry list of changes made to both desktop and mobile platforms. . Some of the changes were included in the developer's Aurora release of Firefox 6, such as the built-in verification tool for plug-ins like Adobe Flash, better memory management for the Panorama grouping feature, a Chrome-style Scratchpad for testing out JavaScript snippets, and a new window for fine-tuning Web site permissions. Other changes are new. One minor tweak, called domain highlighting, will help you read the domain of the Web site you're on more easily. This is a small but important change that people can use to visually verify that they are at the correct URL--for online banking, for example--as opposed to a spoofed one that's likely to be malicious. The link for this article located at CNET Blogs is no longer available. . Explore the latest enhancements in Firefox 6 beta, showcasing fortified security protocols, optimized memory usage, and refinements for tablet functionality.. Firefox Beta, Enhanced Security, Tablet Features, Memory Management, Web Improvements. . LinuxSecurity.com Team
Jul 11, 2011
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