USN-5219-1: Linux kernel vulnerability

Releases

• Ubuntu 21.10
• Ubuntu 21.04
• Ubuntu 20.04 LTS

Packages

• linux - Linux kernel
• linux-aws - Linux kernel for Amazon Web Services (AWS) systems
• linux-aws-5.11 - Linux kernel for Amazon Web Services (AWS) systems
• linux-azure - Linux kernel for Microsoft Azure Cloud systems
• linux-azure-5.11 - Linux kernel for Microsoft Azure cloud systems
• linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
• linux-gcp-5.11 - Linux kernel for Google Cloud Platform (GCP) systems
• linux-hwe-5.11 - Linux hardware enablement (HWE) kernel
• linux-kvm - Linux kernel for cloud environments
• linux-oem-5.10 - Linux kernel for OEM systems
• linux-oracle - Linux kernel for Oracle Cloud systems
• linux-oracle-5.11 - Linux kernel for Oracle Cloud systems
• linux-raspi - Linux kernel for Raspberry Pi systems

Details

It was discovered that the eBPF implementation in the Linux kernel did
not properly validate the memory size of certain ring buffer operation
arguments. 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 21.10

• linux-image-5.13.0-1008-kvm - 5.13.0-1008.8
• linux-image-virtual - 5.13.0.25.36
• linux-image-5.13.0-25-generic - 5.13.0-25.26
• linux-image-generic-64k - 5.13.0.25.36
• linux-image-generic - 5.13.0.25.36
• linux-image-aws - 5.13.0.1009.11
• linux-image-5.13.0-1010-gcp - 5.13.0-1010.12
• linux-image-5.13.0-25-generic-64k - 5.13.0-25.26
• linux-image-5.13.0-25-generic-lpae - 5.13.0-25.26
• linux-image-5.13.0-1013-oracle - 5.13.0-1013.16
• linux-image-5.13.0-1013-raspi-nolpae - 5.13.0-1013.15
• linux-image-5.13.0-1010-azure - 5.13.0-1010.11
• linux-image-raspi-nolpae - 5.13.0.1013.19
• linux-image-oem-20.04 - 5.13.0.25.36
• linux-image-gke - 5.13.0.1010.10
• linux-image-5.13.0-1013-raspi - 5.13.0-1013.15
• linux-image-gcp - 5.13.0.1010.10
• linux-image-5.13.0-25-lowlatency - 5.13.0-25.26
• linux-image-oracle - 5.13.0.1013.14
• linux-image-5.13.0-1009-aws - 5.13.0-1009.10
• linux-image-azure - 5.13.0.1010.11
• linux-image-raspi - 5.13.0.1013.19
• linux-image-kvm - 5.13.0.1008.8
• linux-image-generic-lpae - 5.13.0.25.36
• linux-image-lowlatency - 5.13.0.25.36

Ubuntu 21.04

• linux-image-virtual - 5.11.0.46.46
• linux-image-5.11.0-46-generic-64k - 5.11.0-46.51
• linux-image-generic-64k - 5.11.0.46.46
• linux-image-generic - 5.11.0.46.46
• linux-image-aws - 5.11.0.1025.25
• linux-image-5.11.0-1025-raspi-nolpae - 5.11.0-1025.27
• linux-image-5.11.0-1025-azure - 5.11.0-1025.27
• linux-image-5.11.0-1025-raspi - 5.11.0-1025.27
• linux-image-5.11.0-46-generic - 5.11.0-46.51
• linux-image-5.11.0-1022-kvm - 5.11.0-1022.24
• linux-image-5.11.0-1025-oracle - 5.11.0-1025.27
• linux-image-azure - 5.11.0.1025.25
• linux-image-raspi-nolpae - 5.11.0.1025.23
• linux-image-oem-20.04 - 5.11.0.46.46
• linux-image-gke - 5.11.0.1026.25
• linux-image-5.11.0-1026-gcp - 5.11.0-1026.29
• linux-image-5.11.0-46-lowlatency - 5.11.0-46.51
• linux-image-gcp - 5.11.0.1026.25
• linux-image-5.11.0-1025-aws - 5.11.0-1025.27
• linux-image-oracle - 5.11.0.1025.25
• linux-image-5.11.0-46-generic-lpae - 5.11.0-46.51
• linux-image-raspi - 5.11.0.1025.23
• linux-image-kvm - 5.11.0.1022.23
• linux-image-generic-lpae - 5.11.0.46.46
• linux-image-lowlatency - 5.11.0.46.46

Ubuntu 20.04

• linux-image-oem-20.04b - 5.10.0.1055.56
• linux-image-5.11.0-46-generic-lpae - 5.11.0-46.51~20.04.1
• linux-image-aws - 5.11.0.1025.27~20.04.24
• linux-image-lowlatency-hwe-20.04 - 5.11.0.46.51~20.04.23
• linux-image-5.11.0-1025-azure - 5.11.0-1025.27~20.04.1
• linux-image-5.10.0-1055-oem - 5.10.0-1055.58
• linux-image-5.11.0-1026-gcp - 5.11.0-1026.29~20.04.1
• linux-image-5.11.0-46-generic - 5.11.0-46.51~20.04.1
• linux-image-5.11.0-1025-oracle - 5.11.0-1025.27~20.04.1
• linux-image-generic-hwe-20.04 - 5.11.0.46.51~20.04.23
• linux-image-oem-20.04 - 5.10.0.1055.56
• linux-image-5.11.0-46-lowlatency - 5.11.0-46.51~20.04.1
• linux-image-gcp - 5.11.0.1026.29~20.04.25
• linux-image-5.11.0-1025-aws - 5.11.0-1025.27~20.04.1
• linux-image-oracle - 5.11.0.1025.27~20.04.18
• linux-image-5.11.0-46-generic-64k - 5.11.0-46.51~20.04.1
• linux-image-generic-lpae-hwe-20.04 - 5.11.0.46.51~20.04.23
• linux-image-azure - 5.11.0.1025.27~20.04.24
• linux-image-generic-64k-hwe-20.04 - 5.11.0.46.51~20.04.23
• linux-image-virtual-hwe-20.04 - 5.11.0.46.51~20.04.23

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

• CVE-2021-4204
• https://launchpad.net/bugs/1956585

Related notices

• USN-5217-1: linux-image-oem-20.04d, linux-tools-oem-20.04d, linux-image-unsigned-5.14.0-1018-oem, linux-modules-5.14.0-1018-oem, linux-oem-5.14, linux-oem-5.14-tools-host, linux-tools-5.14.0-1018-oem, linux-headers-oem-20.04d, linux-headers-5.14.0-1018-oem, linux-oem-20.04d, linux-oem-5.14-tools-5.14.0-1018, linux-buildinfo-5.14.0-1018-oem, linux-image-5.14.0-1018-oem, linux-oem-5.14-headers-5.14.0-1018
• USN-5218-1: linux-oem-5.13, linux-headers-5.13.0-1026-oem, linux-tools-oem-20.04c, linux-modules-5.13.0-1026-oem, linux-oem-5.13-tools-host, linux-oem-5.13-headers-5.13.0-1026, linux-image-unsigned-5.13.0-1026-oem, linux-headers-oem-20.04c, linux-oem-20.04c, linux-tools-5.13.0-1026-oem, linux-buildinfo-5.13.0-1026-oem, linux-image-5.13.0-1026-oem, linux-oem-5.13-tools-5.13.0-1026, linux-image-oem-20.04c