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Ubuntu 26.04 containerd-stable Important DoS Issues USN-8473-1

ubuntu
Calendar Grey June 25, 2026
Dist Ubuntu Esm H88
Several security issues in containerd identified and addressed for Ubuntu users with necessary updates and precautions.
Several security issues were fixed in containerd.

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 configu...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu important containerd

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

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8473-1

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu important containerd

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

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