[USN-5206-1] Linux kernel (OEM) vulnerability

========================================================================== Ubuntu Security Notice USN-5206-1 January 05, 2022
linux-oem-5.14 vulnerability ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 20.04 LTS
Summary:
The system could be made to crash or run programs as an administrator.
Software Description: – linux-oem-5.14: Linux kernel for OEM systems
Details:
Nadav Amit discovered that the hugetlb implementation in the Linux kernel did not perform TLB flushes under certain conditions. A local attacker could use this to leak or alter data from other processes that use huge pages.
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 20.04 LTS: linux-image-5.14.0-1013-oem 5.14.0-1013.13 linux-image-oem-20.04d 5.14.0.1013.13
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-5206-1 CVE-2021-4002
Package Information: launchpad.net/ubuntu/+source/linux-oem-5.14/5.14.0-1013.13