[USN-5357-1] Linux kernel vulnerability


========================================================================== Ubuntu Security Notice USN-5357-1 March 31, 2022
linux, linux-aws, linux-azure-4.15, linux-dell300x, linux-hwe, linux-kvm, linux-snapdragon vulnerability ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 18.04 LTS – Ubuntu 16.04 ESM
Summary:
The system could be made to crash or run programs as an administrator.
Software Description: – linux: Linux kernel – linux-aws: Linux kernel for Amazon Web Services (AWS) systems – linux-azure-4.15: Linux kernel for Microsoft Azure Cloud systems – linux-dell300x: Linux kernel for Dell 300x platforms – linux-kvm: Linux kernel for cloud environments – linux-snapdragon: Linux kernel for Qualcomm Snapdragon processors – linux-hwe: Linux hardware enablement (HWE) kernel
Details:
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-4.15.0-1040-dell300x 4.15.0-1040.45 linux-image-4.15.0-1112-kvm 4.15.0-1112.115 linux-image-4.15.0-1125-snapdragon 4.15.0-1125.134 linux-image-4.15.0-1126-aws 4.15.0-1126.135 linux-image-4.15.0-1136-azure 4.15.0-1136.149 linux-image-4.15.0-175-generic 4.15.0-175.184 linux-image-4.15.0-175-generic-lpae 4.15.0-175.184 linux-image-4.15.0-175-lowlatency 4.15.0-175.184 linux-image-aws-lts-18.04 4.15.0.1126.129 linux-image-azure-lts-18.04 4.15.0.1136.109 linux-image-dell300x 4.15.0.1040.42 linux-image-generic 4.15.0.175.164 linux-image-generic-lpae 4.15.0.175.164 linux-image-kvm 4.15.0.1112.108 linux-image-lowlatency 4.15.0.175.164 linux-image-snapdragon 4.15.0.1125.128 linux-image-virtual 4.15.0.175.164
Ubuntu 16.04 ESM: linux-image-4.15.0-175-generic 4.15.0-175.184~16.04.1 linux-image-4.15.0-175-lowlatency 4.15.0-175.184~16.04.1 linux-image-generic-hwe-16.04 4.15.0.175.167 linux-image-lowlatency-hwe-16.04 4.15.0.175.167 linux-image-oem 4.15.0.175.167 linux-image-virtual-hwe-16.04 4.15.0.175.167
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-5357-1 CVE-2022-27666
Package Information: launchpad.net/ubuntu/+source/linux/4.15.0-175.184 launchpad.net/ubuntu/+source/linux-aws/4.15.0-1126.135 launchpad.net/ubuntu/+source/linux-azure-4.15/4.15.0-1136.149 launchpad.net/ubuntu/+source/linux-dell300x/4.15.0-1040.45 launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1112.115 launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1125.134