Amazon Linux 2 Security Advisory: ALAS2DOCKER-2025-088
Advisory Released Date: 2026-01-05
Advisory Updated Date: 2026-01-05
crypto/x509: excluded subdomain constraint does not restrict wildcard SANs
An excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate. For example a constraint that excludes the subdomain test.example.com does not prevent a leaf certificate from claiming the SAN *.example.com. (CVE-2025-61727)
Affected Packages:
runc
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 runc or yum update --advisory ALAS2DOCKER-2025-088 to update your system.
aarch64:
runc-1.3.4-1.amzn2.aarch64
runc-debuginfo-1.3.4-1.amzn2.aarch64
src:
runc-1.3.4-1.amzn2.src
x86_64:
runc-1.3.4-1.amzn2.x86_64
runc-debuginfo-1.3.4-1.amzn2.x86_64