Alerts This Week
Warning Icon 1 692
Alerts This Week
Warning Icon 1 692

Ubuntu 20.04 LTS: USN-6314-1 Moderate: Linux Kernel Denial of Service Fixes

ubuntu
Calendar Grey August 29, 2023
Dist Ubuntu Esm H88
Numerous vulnerabilities in Ubuntu 20.04 LTS kernel addressed, boosting defenses against several denial of service risks.
Several security issues were fixed in the Linux kernel.

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-bluefield: Linux kernel for NVIDIA BlueField platforms - linux-ibm: Linux kernel for IBM cloud systems Details: It was discovered that the netlink implementation in the Linux kernel did not properly validate policies when parsing attributes in some situations. An attacker could use this to cause a denial of service (infinite recursion). (CVE-2020-36691) Billy Jheng Bing Jhong discovered that the CIFS network file system implementation in the Linux kernel did not properly validate arguments to ioctl() in some situations. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2022-0168) It was discovered that the ext4 file system implementation in the Linux kernel contained a use-after-free vulnerability. An attacker could use this ...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service kernel fixes ubuntu linux-bluefield linux-ibm

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS: linux-image-5.4.0-1054-ibm 5.4.0-1054.59 linux-image-5.4.0-1068-bluefield 5.4.0-1068.74 linux-image-bluefield 5.4.0.1068.63 linux-image-ibm-lts-20.04 5.4.0.1054.83 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-6314-1

CVE-2020-36691, CVE-2022-0168, CVE-2022-1184, CVE-2022-27672,

CVE-2022-4269, CVE-2023-0590, CVE-2023-1611, CVE-2023-1855,

CVE-2023-1990, CVE-2023-2124, CVE-2023-2194, CVE-2023-28466,

CVE-2023-30772, CVE-2023-3111, CVE-2023-3141, CVE-2023-33203

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6314-1

Topics%20covered

Topics Covered

security advisory denial of service kernel fixes ubuntu linux-bluefield linux-ibm

Package Information

https://launchpad.net/ubuntu/+source/linux-bluefield/5.4.0-1068.74 https://launchpad.net/ubuntu/+source/linux-ibm/5.4.0-1054.59

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Related News

Your message here