[USN-5135-1] Linux kernel vulnerability

========================================================================== Ubuntu Security Notice USN-5135-1 November 09, 2021
linux, linux-aws, linux-aws-5.11, linux-azure, linux-azure-5.11, linux-gcp, linux-gcp-5.11, linux-hwe-5.11, linux-kvm, linux-oem-5.13, linux-oracle, linux-oracle-5.11 vulnerability ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 21.10 – Ubuntu 21.04 – Ubuntu 20.04 LTS
Summary:
The system could be made to crash under certain conditions.
Software Description: – linux: Linux kernel – linux-aws: Linux kernel for Amazon Web Services (AWS) systems – linux-azure: Linux kernel for Microsoft Azure Cloud systems – linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems – linux-kvm: Linux kernel for cloud environments – linux-oracle: Linux kernel for Oracle Cloud systems – linux-aws-5.11: Linux kernel for Amazon Web Services (AWS) systems – linux-azure-5.11: Linux kernel for Microsoft Azure cloud systems – linux-gcp-5.11: Linux kernel for Google Cloud Platform (GCP) systems – linux-hwe-5.11: Linux hardware enablement (HWE) kernel – linux-oem-5.13: Linux kernel for OEM systems – linux-oracle-5.11: Linux kernel for Oracle Cloud systems
Details:
It was discovered that the Linux kernel did not properly account for the memory usage of certain IPC objects. A local attacker could use this to cause a denial of service (memory exhaustion).
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 21.10: linux-image-5.13.0-1005-kvm 5.13.0-1005.5 linux-image-5.13.0-1006-aws 5.13.0-1006.7 linux-image-5.13.0-1006-gcp 5.13.0-1006.7 linux-image-5.13.0-1007-azure 5.13.0-1007.8 linux-image-5.13.0-1009-oracle 5.13.0-1009.11 linux-image-5.13.0-21-generic 5.13.0-21.21 linux-image-5.13.0-21-generic-64k 5.13.0-21.21 linux-image-5.13.0-21-generic-lpae 5.13.0-21.21 linux-image-5.13.0-21-lowlatency 5.13.0-21.21 linux-image-aws 5.13.0.1006.8 linux-image-azure 5.13.0.1007.8 linux-image-gcp 5.13.0.1006.7 linux-image-generic 5.13.0.21.32 linux-image-generic-64k 5.13.0.21.32 linux-image-generic-lpae 5.13.0.21.32 linux-image-gke 5.13.0.1006.7 linux-image-kvm 5.13.0.1005.5 linux-image-lowlatency 5.13.0.21.32 linux-image-oem-20.04 5.13.0.21.32 linux-image-oracle 5.13.0.1009.11 linux-image-virtual 5.13.0.21.32
Ubuntu 21.04: linux-image-5.11.0-1019-kvm 5.11.0-1019.21 linux-image-5.11.0-1021-aws 5.11.0-1021.22 linux-image-5.11.0-1021-azure 5.11.0-1021.22 linux-image-5.11.0-1021-oracle 5.11.0-1021.22 linux-image-5.11.0-1022-gcp 5.11.0-1022.24 linux-image-5.11.0-40-generic 5.11.0-40.44 linux-image-5.11.0-40-generic-64k 5.11.0-40.44 linux-image-5.11.0-40-generic-lpae 5.11.0-40.44 linux-image-5.11.0-40-lowlatency 5.11.0-40.44 linux-image-aws 5.11.0.1021.22 linux-image-azure 5.11.0.1021.22 linux-image-gcp 5.11.0.1022.22 linux-image-generic 5.11.0.40.41 linux-image-generic-64k 5.11.0.40.41 linux-image-generic-lpae 5.11.0.40.41 linux-image-gke 5.11.0.1022.22 linux-image-kvm 5.11.0.1019.20 linux-image-lowlatency 5.11.0.40.41 linux-image-oem-20.04 5.11.0.40.41 linux-image-oracle 5.11.0.1021.22 linux-image-virtual 5.11.0.40.41
Ubuntu 20.04 LTS: linux-image-5.11.0-1021-aws 5.11.0-1021.22~20.04.2 linux-image-5.11.0-1021-azure 5.11.0-1021.22~20.04.1 linux-image-5.11.0-1021-oracle 5.11.0-1021.22~20.04.1 linux-image-5.11.0-1022-gcp 5.11.0-1022.24~20.04.1 linux-image-5.11.0-40-generic 5.11.0-40.44~20.04.2 linux-image-5.11.0-40-generic-64k 5.11.0-40.44~20.04.2 linux-image-5.11.0-40-generic-lpae 5.11.0-40.44~20.04.2 linux-image-5.11.0-40-lowlatency 5.11.0-40.44~20.04.2 linux-image-5.13.0-1019-oem 5.13.0-1019.23 linux-image-aws 5.11.0.1021.22~20.04.20 linux-image-azure 5.11.0.1021.22~20.04.21 linux-image-gcp 5.11.0.1022.24~20.04.21 linux-image-generic-64k-hwe-20.04 5.11.0.40.44~20.04.18 linux-image-generic-hwe-20.04 5.11.0.40.44~20.04.18 linux-image-generic-lpae-hwe-20.04 5.11.0.40.44~20.04.18 linux-image-lowlatency-hwe-20.04 5.11.0.40.44~20.04.18 linux-image-oem-20.04c 5.13.0.1019.23 linux-image-oracle 5.11.0.1021.22~20.04.14 linux-image-virtual-hwe-20.04 5.11.0.40.44~20.04.18
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-5135-1 CVE-2021-3759
Package Information: launchpad.net/ubuntu/+source/linux/5.13.0-21.21 launchpad.net/ubuntu/+source/linux-aws/5.13.0-1006.7 launchpad.net/ubuntu/+source/linux-azure/5.13.0-1007.8 launchpad.net/ubuntu/+source/linux-gcp/5.13.0-1006.7 launchpad.net/ubuntu/+source/linux-kvm/5.13.0-1005.5 launchpad.net/ubuntu/+source/linux-oracle/5.13.0-1009.11 launchpad.net/ubuntu/+source/linux/5.11.0-40.44 launchpad.net/ubuntu/+source/linux-aws/5.11.0-1021.22 launchpad.net/ubuntu/+source/linux-azure/5.11.0-1021.22 launchpad.net/ubuntu/+source/linux-gcp/5.11.0-1022.24 launchpad.net/ubuntu/+source/linux-kvm/5.11.0-1019.21 launchpad.net/ubuntu/+source/linux-oracle/5.11.0-1021.22 launchpad.net/ubuntu/+source/linux-aws-5.11/5.11.0-1021.22~20.04.2 launchpad.net/ubuntu/+source/linux-azure-5.11/5.11.0-1021.22~20.04.1 launchpad.net/ubuntu/+source/linux-gcp-5.11/5.11.0-1022.24~20.04.1 launchpad.net/ubuntu/+source/linux-hwe-5.11/5.11.0-40.44~20.04.2 launchpad.net/ubuntu/+source/linux-oem-5.13/5.13.0-1019.23 launchpad.net/ubuntu/+source/linux-oracle-5.11/5.11.0-1021.22~20.04.1