1. Ubuntu Security Notices
  2. USN-5540-1

USN-5540-1: Linux kernel vulnerabilities

Publication date

29 July 2022

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

  • linux - Linux kernel
  • linux-aws - Linux kernel for Amazon Web Services (AWS) systems
  • linux-kvm - Linux kernel for cloud environments
  • linux-lts-xenial - Linux hardware enablement kernel from Xenial for Trusty

Details

Liu Jian discovered that the IGMP protocol implementation in the Linux
kernel contained a race condition, leading to a use-after-free
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2022-20141)

It was discovered that the USB gadget subsystem in the Linux kernel did not
properly validate interface descriptor requests. An attacker could possibly
use this to cause a denial of service (system crash). (CVE-2022-25258)

It was discovered that the Remote NDIS (RNDIS) USB gadget implementation in
the Linux kernel did not properly validate the size of the RNDIS_MSG_SET
command. An attacker could possibly use this to expose sensitive
information (kernel memory). (CVE-2022-25375)

Arthur Mongodin discovered that the netfilter subsystem in the...

Liu Jian discovered that the IGMP protocol implementation in the Linux
kernel contained a race condition, leading to a use-after-free
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2022-20141)

It was discovered that the USB gadget subsystem in the Linux kernel did not
properly validate interface descriptor requests. An attacker could possibly
use this to cause a denial of service (system crash). (CVE-2022-25258)

It was discovered that the Remote NDIS (RNDIS) USB gadget implementation in
the Linux kernel did not properly validate the size of the RNDIS_MSG_SET
command. An attacker could possibly use this to expose sensitive
information (kernel memory). (CVE-2022-25375)

Arthur Mongodin discovered that the netfilter subsystem in the Linux kernel
did not properly perform data validation. A local attacker could use this
to escalate privileges in certain situations. (CVE-2022-34918)

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
16.04 xenial linux-image-4.4.0-230-lowlatency –  4.4.0-230.264  
linux-image-virtual –  4.4.0.230.236  
linux-image-generic –  4.4.0.230.236  
linux-image-aws –  4.4.0.1146.150  
linux-image-4.4.0-230-generic –  4.4.0-230.264  
linux-image-4.4.0-1146-aws –  4.4.0-1146.161  
linux-image-4.4.0-1111-kvm –  4.4.0-1111.121  
linux-image-kvm –  4.4.0.1111.108  
linux-image-lowlatency –  4.4.0.230.236  
14.04 trusty linux-image-4.4.0-230-lowlatency –  4.4.0-230.264~14.04.1  
linux-image-generic-lts-xenial –  4.4.0.230.200  
linux-image-4.4.0-1110-aws –  4.4.0-1110.116  
linux-image-lowlatency-lts-xenial –  4.4.0.230.200  
linux-image-aws –  4.4.0.1110.107  
linux-image-4.4.0-230-generic –  4.4.0-230.264~14.04.1  
linux-image-virtual-lts-xenial –  4.4.0.230.200  

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References

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