[USN-5357-2] Linux kernel vulnerability

========================================================================== Ubuntu Security Notice USN-5357-2 March 31, 2022
linux-aws-hwe, linux-gcp-4.15, linux-oracle vulnerability ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 18.04 LTS – Ubuntu 16.04 ESM
The system could be made to crash or run programs as an administrator.
Software Description: – linux-gcp-4.15: Linux kernel for Google Cloud Platform (GCP) systems – linux-oracle: Linux kernel for Oracle Cloud systems – linux-aws-hwe: Linux kernel for Amazon Web Services (AWS-HWE) systems
It was discovered that the IPsec implementation in the Linux kernel did not properly allocate enough memory when performing ESP transformations, leading to a heap-based buffer overflow. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 18.04 LTS: linux-image-4.15.0-1091-oracle 4.15.0-1091.100 linux-image-4.15.0-1120-gcp 4.15.0-1120.134 linux-image-gcp-lts-18.04 linux-image-oracle-lts-18.04
Ubuntu 16.04 ESM: linux-image-4.15.0-1091-oracle 4.15.0-1091.100~16.04.1 linux-image-4.15.0-1126-aws-hwe 4.15.0-1126.135~16.04.2 linux-image-aws-hwe 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-5357-2 ubuntu.com/security/notices/USN-5357-1 CVE-2022-27666
Package Information: launchpad.net/ubuntu/+source/linux-gcp-4.15/4.15.0-1120.134 launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1091.100