[USN-5140-1] Linux kernel (OEM 5.14) vulnerabilities

========================================================================== Ubuntu Security Notice USN-5140-1 November 11, 2021
linux-oem-5.14 vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 20.04 LTS
Several security issues were fixed in the Linux kernel.
Software Description: – linux-oem-5.14: Linux kernel for OEM systems
It was discovered that the AMD Cryptographic Coprocessor (CCP) driver in the Linux kernel did not properly deallocate memory in some error conditions. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2021-3744, CVE-2021-3764)
It was discovered that an integer overflow could be triggered in the eBPF implementation in the Linux kernel when preallocating objects for stack maps. A privileged local attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2021-41864)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 20.04 LTS: linux-image-5.14.0-1007-oem 5.14.0-1007.7 linux-image-oem-20.04d
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-5140-1 CVE-2021-3744, CVE-2021-3764, CVE-2021-41864
Package Information: launchpad.net/ubuntu/+source/linux-oem-5.14/5.14.0-1007.7