Amazon Linux 2 (EOS) Security Advisory: ALAS2ECS-2026-151
Advisory Released Date: 2026-10-24
Advisory Updated Date: 2026-10-26
Due to security concerns regarding a small set of intermediate certificates issued by a specific Certificate Authority (CA), the Go's crypto/x509 package is updated to not trust certificates issued by the affected intermediate certificates. This would prevent possible future misuse of certificate issued by the affected intermediate certificates. (CVE-2026-111943)
The `github.com/moby/sys/user` package provides Go utilities for parsing and looking up entries in Unix-style user and group database files. Versions before 0.4.1 do not sufficiently limit entries when parsing `/etc/passwd`- or `/etc/group`-style files, allowing an attacker who can supply a specially crafted file to cause excessive memory consumption and potentially terminate the affected process due to an out-of-memory condition. This issue is patched in version 0.4.1. As a workaround, avoid parsing attacker-controlled user or group database files, or validate and limit untrusted input before parsing it. (CVE-2026-61801)
Affected Packages:
runc
Note:
This advisory is applicable to Amazon Linux 2 - Ecs 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 runc or yum update --advisory ALAS2ECS-2026-151 to update your system.
aarch64:
runc-1.4.3-2.amzn2.aarch64
runc-debuginfo-1.4.3-2.amzn2.aarch64
src:
runc-1.4.3-2.amzn2.src
x86_64:
runc-1.4.3-2.amzn2.x86_64
runc-debuginfo-1.4.3-2.amzn2.x86_64