[USN-6775-2] Linux kernel vulnerabilities

[Rodrigo Figueiredo Zaiden]

==========================================================================
Ubuntu Security Notice USN-6775-2
May 21, 2024

linux-aws, linux-aws-5.15, linux-gke 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-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-gke: Linux kernel for Google Container Engine (GKE) systems
- linux-aws-5.15: Linux kernel for Amazon Web Services (AWS) systems

Details:

Zheng Wang discovered that the Broadcom FullMAC WLAN driver in the Linux
kernel contained a race condition during device removal, leading to a use-
after-free vulnerability. A physically proximate attacker could possibly
use this to cause a denial of service (system crash). (CVE-2023-47233)

Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
   - MAC80211 subsystem;
   - Tomoyo security module;
(CVE-2024-26622, CVE-2023-52530)

Update instructions:

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

Ubuntu 22.04 LTS
   linux-image-5.15.0-1059-gke     5.15.0-1059.64
   linux-image-5.15.0-1062-aws     5.15.0-1062.68
   linux-image-aws-lts-22.04       5.15.0.1062.62
   linux-image-gke                 5.15.0.1059.58
   linux-image-gke-5.15            5.15.0.1059.58

Ubuntu 20.04 LTS
   linux-image-5.15.0-1062-aws     5.15.0-1062.68~20.04.1
   linux-image-aws                 5.15.0.1062.68~20.04.1

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-6775-2
   https://ubuntu.com/security/notices/USN-6775-1
   CVE-2023-47233, CVE-2023-52530, CVE-2024-26622

Package Information:
   https://launchpad.net/ubuntu/+source/linux-aws/5.15.0-1062.68
   https://launchpad.net/ubuntu/+source/linux-gke/5.15.0-1059.64
   https://launchpad.net/ubuntu/+source/linux-aws-5.15/5.15.0-1062.68~20.04.1

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