Amazon Linux 2027 Preview Security Advisory: ALAS2027-2026-253
Advisory Released Date: 2026-10-27
Advisory Updated Date: 2026-11-10
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.
Amazon Linux golang-based packages are being rebuilt with the fixed crypto/x509 package described in CVE-2026-111943 as a defense-in-depth measure against the eMudhra intermediate CA certificates with weak private keys.
By default, Go programs on Amazon Linux use the system-wide certificate authority (CA) store. Therefore, the primary fix for this issue is the ca-certificates update that removes the root CA certificates that signed the affected intermediates. Customers should ensure that update is installed: https://explore.alas.aws.amazon.com/CVE-2026-113470.html (CVE-2026-111943)
A trusted template author may have previously written a valid template wherein the use of the |yield| keyword would not be correctly escaped.
We now ensure that valid keyword uses are escaped and non-keyword uses are not escaped. (CVE-2026-97030)
Affected Packages:
buildah
Issue Correction:
Run dnf update buildah --releasever 2027.0.20261027 or dnf update --advisory ALAS2027-2026-253 --releasever 2027.0.20261027 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2027 documentation
aarch64:
buildah-debuginfo-1.45.1-1.amzn2027.0.2.aarch64
buildah-tests-debuginfo-1.45.1-1.amzn2027.0.2.aarch64
buildah-1.45.1-1.amzn2027.0.2.aarch64
buildah-tests-1.45.1-1.amzn2027.0.2.aarch64
buildah-debugsource-1.45.1-1.amzn2027.0.2.aarch64
src:
buildah-1.45.1-1.amzn2027.0.2.src
x86_64:
buildah-1.45.1-1.amzn2027.0.2.x86_64
buildah-tests-1.45.1-1.amzn2027.0.2.x86_64
buildah-debugsource-1.45.1-1.amzn2027.0.2.x86_64
buildah-debuginfo-1.45.1-1.amzn2027.0.2.x86_64
buildah-tests-debuginfo-1.45.1-1.amzn2027.0.2.x86_64