USN-5266-1: Linux kernel (GKE) vulnerabilities
3 February 2022
Several security issues were fixed in the Linux kernel.
Releases
Packages
- 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
-
linux-image-gke
-
5.4.0.1061.71
-
linux-image-gke-5.4
-
5.4.0.1061.71
-
linux-image-5.4.0-1061-gke
-
5.4.0-1061.64
Ubuntu 18.04
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.