Amazon Linux 2 (EOS) Security Advisory: ALAS2ECS-2026-143
Advisory Released Date: 2026-10-12
Advisory Updated Date: 2026-10-12
On Unix systems, opening a file in an os.Root improperly follows symlinks to locations outside of the Root when the final path component of the a path is a symbolic link and the path ends in /. For example, 'root.Open("symlink/")' will open "symlink" even when "symlink" is a symbolic link pointing outside of the root. (CVE-2026-39822)
Handshakes which used Encrypted Client Hello could be de-anonymized by a passive network observer due to a disclosure of pre-shared key identities in the unencrypted client hello. (CVE-2026-42505)
Affected Packages:
docker
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 docker or yum update --advisory ALAS2ECS-2026-143 to update your system.
aarch64:
docker-25.0.16-1.amzn2.0.5.aarch64
docker-debuginfo-25.0.16-1.amzn2.0.5.aarch64
src:
docker-25.0.16-1.amzn2.0.5.src
x86_64:
docker-25.0.16-1.amzn2.0.5.x86_64
docker-debuginfo-25.0.16-1.amzn2.0.5.x86_64