[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
Summary:
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
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: linux-image-5.13.0-1030-oracle 5.13.0-1030.35 linux-image-oracle 5.13.0.1030.30
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 5.13.0.1027.32~20.04.1 linux-image-oracle 5.13.0.1030.35~20.04.1
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: 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