[USN-5295-1] Linux kernel (HWE) vulnerabilities

========================================================================== Ubuntu Security Notice USN-5295-1 February 18, 2022
linux-hwe-5.13 vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 20.04 LTS
Summary:
Several security issues were fixed in the Linux kernel.
Software Description: – linux-hwe-5.13: Linux hardware enablement (HWE) kernel
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)
Jann Horn discovered a race condition in the Unix domain socket implementation in the Linux kernel that could result in a read-after-free. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-4083)
Kirill Tkhai discovered that the XFS file system implementation in the Linux kernel did not calculate size correctly when pre-allocating space in some situations. A local attacker could use this to expose sensitive information. (CVE-2021-4155)
Sushma Venkatesh Reddy discovered that the Intel i915 graphics driver in the Linux kernel did not perform a GPU TLB flush in some situations. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2022-0330)
It was discovered that the VMware Virtual GPU driver in the Linux kernel did not properly handle certain failure conditions, leading to a stale entry in the file descriptor table. A local attacker could use this to expose sensitive information or possibly gain administrative privileges. (CVE-2022-22942)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 20.04 LTS: linux-image-5.13.0-30-generic 5.13.0-30.33~20.04.1 linux-image-5.13.0-30-generic-64k 5.13.0-30.33~20.04.1 linux-image-5.13.0-30-generic-lpae 5.13.0-30.33~20.04.1 linux-image-5.13.0-30-lowlatency 5.13.0-30.33~20.04.1 linux-image-generic-64k-hwe-20.04 5.13.0.30.33~20.04.17 linux-image-generic-hwe-20.04 5.13.0.30.33~20.04.17 linux-image-generic-lpae-hwe-20.04 5.13.0.30.33~20.04.17 linux-image-lowlatency-hwe-20.04 5.13.0.30.33~20.04.17 linux-image-virtual-hwe-20.04 5.13.0.30.33~20.04.17
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-5295-1 CVE-2021-22600, CVE-2021-4083, CVE-2021-4155, CVE-2022-0330, CVE-2022-22942
Package Information: launchpad.net/ubuntu/+source/linux-hwe-5.13/5.13.0-30.33~20.04.1