[USN-5443-2] Linux kernel vulnerabilities

========================================================================== Ubuntu Security Notice USN-5443-2 June 01, 2022
linux-gcp-5.13, linux-oracle, linux-oracle-5.13 vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 21.10 – Ubuntu 20.04 LTS
Several security issues were fixed in the Linux kernel.
Software Description: – linux-oracle: Linux kernel for Oracle Cloud systems – linux-gcp-5.13: Linux kernel for Google Cloud Platform (GCP) systems – linux-oracle-5.13: Linux kernel for Oracle Cloud systems
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: linux-image-5.13.0-1030-oracle 5.13.0-1030.35 linux-image-oracle
Ubuntu 20.04 LTS: linux-image-5.13.0-1027-gcp 5.13.0-1027.32~20.04.1 linux-image-5.13.0-1030-oracle 5.13.0-1030.35~20.04.1 linux-image-gcp linux-image-oracle
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-5443-2 ubuntu.com/security/notices/USN-5443-1 CVE-2022-29581, CVE-2022-30594
Package Information: launchpad.net/ubuntu/+source/linux-oracle/5.13.0-1030.35 launchpad.net/ubuntu/+source/linux-gcp-5.13/5.13.0-1027.32~20.04.1 launchpad.net/ubuntu/+source/linux-oracle-5.13/5.13.0-1030.35~20.04.1