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Ubuntu 22.04 LTS USN-5567-1 Critical: Kernel Denial Of Service

Several security issues were fixed in the Linux kernel.. =========================================================================Ubuntu Security Notice USN-5567-1 August 10, 2022 linux-oem-5.14, linux-oem-5.17 vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-oem-5.17: Linux kernel for OEM systems - linux-oem-5.14: Linux kernel for OEM systems Details: Zhenpeng Lin discovered that the network packet scheduler implementation in the Linux kernel did not properly remove all references to a route filter before freeing it in some situations. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2022-2588) It was discovered that the netfilter subsystem of the Linux kernel did not prevent one nft object from referencing an nft set in another nft table, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2022-2586) It was discovered that the implementation of POSIX timers in the Linux kernel did not properly clean up timers in some situations. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2022-2585) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 22.04 LTS: linux-image-5.17.0-1015-oem 5.17.0-1015.16 linux-image-oem-22.04 5.17.0.1015.14 linux-image-oem-22.04a 5.17.0.1015.14 Ubuntu 20.04 LTS: linux-image-5.14.0-1048-oem 5.14.0-1048.55 linux-image-oem-20.04 5.14.0.1048.44 linux-image-oem-20.04b 5.14.0.1048.44 linux-image-oem-20.04c 5.14.0.1048.44 linux-image-oem-20.04d 5.14.0.1048.44 After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. References: https://ubuntu.com/security/notices/USN-5567-1 CVE-2022-2585, CVE-2022-2586, CVE-2022-2588 Package Information: https://launchpad.net/ubuntu/+source/linux-oem-5.17/5.17.0-1015.16 https://launchpad.net/ubuntu/+source/linux-oem-5.14/5.14.0-1048.55 . Several vulnerabilities addressed in the Linux kernel for Ubuntu 20.04 and 22.04 LTS. Ensure you update immediately to protect against potential threats.. Linux Kernel Updates, Ubuntu Security Notice, Denial Of Service, Linux OEM Security Issues. . Severity: Critical. LinuxSecurity.com Team

Aug 10, 2022 •Critical Ubuntu