[USN-5266-1] Linux kernel (GKE) vulnerabilities

========================================================================== Ubuntu Security Notice USN-5266-1 February 03, 2022
linux-gke, linux-gke-5.4 vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 20.04 LTS – Ubuntu 18.04 LTS
Summary:
Several security issues were fixed in the Linux kernel.
Software Description: – linux-gke: Linux kernel for Google Container Engine (GKE) systems – linux-gke-5.4: Linux kernel for Google Container Engine (GKE) systems
Details:
It was discovered that the Packet network protocol implementation in the Linux kernel contained a double-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-22600)
Luo Likang discovered that the FireDTV Firewire driver in the Linux kernel did not properly perform bounds checking in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-42739)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 20.04 LTS: linux-image-5.4.0-1061-gke 5.4.0-1061.64 linux-image-gke 5.4.0.1061.71 linux-image-gke-5.4 5.4.0.1061.71
Ubuntu 18.04 LTS: linux-image-5.4.0-1061-gke 5.4.0-1061.64~18.04.1 linux-image-gke-5.4 5.4.0.1061.64~18.04.25
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: ubuntu.com/security/notices/USN-5266-1 CVE-2021-22600, CVE-2021-42739
Package Information: launchpad.net/ubuntu/+source/linux-gke/5.4.0-1061.64 launchpad.net/ubuntu/+source/linux-gke-5.4/5.4.0-1061.64~18.04.1