USN-8472-1: containerd vulnerabilities

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. This issue only affected Ubuntu
22.04 LTS, Ubuntu 24.04 LTS, Ubuntu 25.10 and Ubuntu 26.04 LTS.
(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. This issue only affected Ubuntu 22.04 LTS, Ubuntu
24.04 LTS, Ubuntu 25.10 and Ubuntu 26.04 LTS. (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. This issue only
affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, Ubuntu 25.10 and Ubuntu
26.04 LTS. (CVE-2026-53492)