1. Ubuntu Security Notices
  2. USN-5443-2

USN-5443-2: Linux kernel vulnerabilities

Publication date

1 June 2022

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

Details

Kyle Zeng discovered that the Network Queuing and Scheduling subsystem of
the Linux kernel did not properly perform reference counting in some
situations, 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-2022-29581)

Jann Horn discovered that the Linux kernel did not properly enforce seccomp
restrictions in some situations. A local attacker could use this to bypass
intended seccomp sandbox restrictions. (CVE-2022-30594)

Kyle Zeng discovered that the Network Queuing and Scheduling subsystem of
the Linux kernel did not properly perform reference counting in some
situations, 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-2022-29581)

Jann Horn discovered that the Linux kernel did not properly enforce seccomp
restrictions in some situations. A local attacker could use this to bypass
intended seccomp sandbox restrictions. (CVE-2022-30594)

Update instructions

After a standard system update you need to reboot your computer to make all the necessary changes.

Learn more about how to get the fixes.

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.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
21.10 impish linux-image-5.13.0-1030-oracle –  5.13.0-1030.35
linux-image-oracle –  5.13.0.1030.30
20.04 focal linux-image-oracle –  5.13.0.1030.35~20.04.1
linux-image-5.13.0-1030-oracle –  5.13.0-1030.35~20.04.1
linux-image-gcp –  5.13.0.1027.32~20.04.1
linux-image-5.13.0-1027-gcp –  5.13.0-1027.32~20.04.1

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References

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