USN-5443-2: Linux kernel vulnerabilities
1 June 2022
Several security issues were fixed in the Linux kernel.
Releases
Packages
- linux-gcp-5.13 - Linux kernel for Google Cloud Platform (GCP) systems
- linux-oracle - Linux kernel for Oracle Cloud systems
- linux-oracle-5.13 - Linux kernel for Oracle Cloud systems
Details
Kyle Zeng discovered that the Network Queuing and Scheduling subsystem of
the Linux kernel did not properly perform reference counting in some
situations, 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-2022-29581)
Jann Horn discovered that the Linux kernel did not properly enforce seccomp
restrictions in some situations. A local attacker could use this to bypass
intended seccomp sandbox restrictions. (CVE-2022-30594)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 21.10
Ubuntu 20.04
-
linux-image-oracle
-
5.13.0.1030.35~20.04.1
-
linux-image-5.13.0-1030-oracle
-
5.13.0-1030.35~20.04.1
-
linux-image-gcp
-
5.13.0.1027.32~20.04.1
-
linux-image-5.13.0-1027-gcp
-
5.13.0-1027.32~20.04.1
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.