Amazon Linux 2 Security Advisory: ALAS2DOCKER-2026-139
Advisory Released Date: 2026-08-17
Advisory Updated Date: 2026-08-17
Severity:
Important
Issue Overview:
A norm.Iter can enter an infinite loop when handling input containing invalid UTF-8 bytes. (CVE-2026-56852)
Affected Packages:
containerd
Note:
This advisory is applicable to Amazon Linux 2 - Docker Extra. Visit this page to learn more about Amazon Linux 2 (AL2) Extras and this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update containerd or yum update --advisory ALAS2DOCKER-2026-139 to update your system.
New Packages:
aarch64:
containerd-2.1.9-1.amzn2.0.2.aarch64
containerd-stress-2.1.9-1.amzn2.0.2.aarch64
containerd-debuginfo-2.1.9-1.amzn2.0.2.aarch64
src:
containerd-2.1.9-1.amzn2.0.2.src
x86_64:
containerd-2.1.9-1.amzn2.0.2.x86_64
containerd-stress-2.1.9-1.amzn2.0.2.x86_64
containerd-debuginfo-2.1.9-1.amzn2.0.2.x86_64