Home / mailings

PDF

[USN-8473-1] containerd-stable vulnerabilities

Posted on 25 June 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8473-1
June 25, 2026

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

- Ubuntu 26.04 LTS
- Ubuntu 25.10

Summary:

Several security issues were fixed in containerd.

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

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. (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)

Henry Beberman and Robert Prast discovered that containerd incorrectly
validated image references when importing container checkpoints. An
attacker could possibly use this issue to poison the local image cache and
execute arbitrary code in other pods. (CVE-2026-50195)

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. (CVE-2026-53488)

Yuming Zhang, Song Li, Sangwon Ryu, Henry Beberman, Robert Prast, Kyle
Elliott and Zhenchen Wang discovered that containerd incorrectly validated
symlinked paths when restoring container checkpoints. An attacker could
possibly use this issue to read arbitrary files on the host, resulting in
information disclosure. (CVE-2026-53489)

Robert Prast discovered that containerd incorrectly trusted device
interface annotations when restoring container checkpoints. An attacker
could possibly use this issue to bypass resource allocation restrictions
and inject devices or host mounts into a container. (CVE-2026-53492)

Update instructions:

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

Ubuntu 26.04 LTS
containerd-stable 2.2.2-0ubuntu1.1

Ubuntu 25.10
containerd-stable 2.1.6-0ubuntu1~25.10.2

After a standard system update you need to restart containerd to make all
the necessary changes.

References:
https://ubuntu.com/security/notices/USN-8473-1
CVE-2026-33814, CVE-2026-47262, CVE-2026-50195, CVE-2026-53488,
CVE-2026-53489, CVE-2026-53492

Package Information:
https://launchpad.net/ubuntu/+source/containerd-stable/2.2.2-0ubuntu1.1
https://launchpad.net/ubuntu/+source/containerd-stable/2.1.6-0ubuntu1~25.10.2

--===============5323803034648326910==Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature

 

TOP