1. Ubuntu Security Notices
  2. USN-5565-1

USN-5565-1: Linux kernel vulnerabilities

Publication date

10 August 2022

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

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. (

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)

Johannes Wikner and Kaveh Razavi discovered that for some AMD x86-64
processors, the branch predictor could by mis-trained for return
instructions in certain circumstances. A local attacker could possibly use
this to expose sensitive information. (CVE-2022-29900)

Johannes Wikner and Kaveh Razavi discovered that for some Intel x86-64
processors, the Linux kernel's protections against speculative branch
target injection attacks were insufficient in some circumstances. A local
attacker could possibly use this to expose sensitive information.
(CVE-2022-29901)

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
22.04 jammy linux-image-virtual –  5.15.0.46.46
linux-image-generic-64k –  5.15.0.46.46
linux-image-lowlatency-hwe-22.04 –  5.15.0.46.43
linux-image-virtual-hwe-22.04 –  5.15.0.46.46
linux-image-generic-hwe-22.04 –  5.15.0.46.46
linux-image-5.15.0-46-generic-64k –  5.15.0-46.49
linux-image-5.15.0-46-lowlatency –  5.15.0-46.49
linux-image-5.15.0-46-generic –  5.15.0-46.49
linux-image-lowlatency-64k –  5.15.0.46.43
linux-image-5.15.0-46-lowlatency-64k –  5.15.0-46.49
linux-image-5.15.0-46-generic-lpae –  5.15.0-46.49
linux-image-generic –  5.15.0.46.46
linux-image-generic-64k-hwe-22.04 –  5.15.0.46.46
linux-image-generic-lpae –  5.15.0.46.46
linux-image-generic-lpae-hwe-22.04 –  5.15.0.46.46
linux-image-lowlatency-64k-hwe-22.04 –  5.15.0.46.43
linux-image-lowlatency –  5.15.0.46.43
20.04 focal linux-image-virtual-hwe-20.04 –  5.15.0.46.49~20.04.16
linux-image-lowlatency-hwe-20.04 –  5.15.0.46.49~20.04.15
linux-image-5.15.0-46-generic-64k –  5.15.0-46.49~20.04.1
linux-image-5.15.0-46-lowlatency –  5.15.0-46.49~20.04.1
linux-image-generic-hwe-20.04 –  5.15.0.46.49~20.04.16
linux-image-lowlatency-64k-hwe-20.04 –  5.15.0.46.49~20.04.15
linux-image-5.15.0-46-generic –  5.15.0-46.49~20.04.1
linux-image-5.15.0-46-lowlatency-64k –  5.15.0-46.49~20.04.1
linux-image-5.15.0-46-generic-lpae –  5.15.0-46.49~20.04.1
linux-image-generic-lpae-hwe-20.04 –  5.15.0.46.49~20.04.16
linux-image-generic-64k-hwe-20.04 –  5.15.0.46.49~20.04.16

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References

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