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[USN-8471-1] containerd vulnerabilities

Posted on 25 June 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8471-1
June 25, 2026

containerd vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.04 LTS
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in containerd.

Software Description:
- containerd: open and reliable container runtime library

Details:

It was discovered that containerd incorrectly handled HTTP/2 SETTINGS
frames. A remote attacker could possibly use this issue to cause containerd
to enter an infinite loop, resulting in a denial of service. This issue
only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and
Ubuntu 22.04 LTS. (CVE-2026-33814)

Jakub Ciolek and Kyle Elliott discovered that containerd incorrectly
handled group parsing when creating containers from images. An attacker
could possibly use this issue to cause containerd to consume excessive
memory, resulting in a denial of service. (CVE-2026-47262)

Robert Prast discovered that containerd incorrectly propagated labels
from image configurations to containers. An attacker could possibly use
this issue to execute arbitrary code on the host. This issue only affected
Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS
and Ubuntu 26.04 LTS. (CVE-2026-53488)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 26.04 LTS
golang-github-containerd-containerd-api-dev 1.7.24~ds1-10ubuntu1+esm1
Available with Ubuntu Pro
golang-github-containerd-containerd-dev 1.7.24~ds1-10ubuntu1+esm1
Available with Ubuntu Pro

Ubuntu 24.04 LTS
golang-github-containerd-containerd-dev 1.6.24~ds1-1ubuntu1.3+esm3
Available with Ubuntu Pro

Ubuntu 22.04 LTS
golang-github-containerd-containerd-dev 1.6.12-0ubuntu1~22.04.11

Ubuntu 20.04 LTS
golang-github-containerd-containerd-dev 1.6.12-0ubuntu1~20.04.8+esm2
Available with Ubuntu Pro

Ubuntu 18.04 LTS
containerd 1.6.12-0ubuntu1~18.04.1+esm4
Available with Ubuntu Pro
golang-github-containerd-containerd-dev 1.6.12-0ubuntu1~18.04.1+esm4
Available with Ubuntu Pro

Ubuntu 16.04 LTS
containerd 1.2.6-0ubuntu1~16.04.6+esm7
Available with Ubuntu Pro
golang-github-docker-containerd-dev 1.2.6-0ubuntu1~16.04.6+esm7
Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-8471-1
CVE-2026-33814, CVE-2026-47262, CVE-2026-53488

Package Information:
https://launchpad.net/ubuntu/+source/containerd/1.6.12-0ubuntu1~22.04.11

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