Amazon Linux 2023 Security Advisory: ALAS2023-2026-1775
Advisory Released Date: 2026-06-08
Advisory Updated Date: 2026-06-08
Severity:
Medium
Issue Overview:
Use of a Broken or Risky Cryptographic Algorithm vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA bcpkix on all (pkix modules). PKIX draft CompositeVerifier accepts empty signature sequence as valid. This issue affects BC-JAVA: from 1.49 before 1.84. (CVE-2026-5588)
Affected Packages:
bouncycastle
Issue Correction:
Run dnf update bouncycastle --releasever 2023.12.20260608 or dnf update --advisory ALAS2023-2026-1775 --releasever 2023.12.20260608 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation
New Packages:
noarch:
bouncycastle-1.70-4.amzn2023.0.7.noarch
bouncycastle-pkix-1.70-4.amzn2023.0.7.noarch
bouncycastle-mail-1.70-4.amzn2023.0.7.noarch
bouncycastle-util-1.70-4.amzn2023.0.7.noarch
bouncycastle-pg-1.70-4.amzn2023.0.7.noarch
bouncycastle-tls-1.70-4.amzn2023.0.7.noarch
bouncycastle-javadoc-1.70-4.amzn2023.0.7.noarch
src:
bouncycastle-1.70-4.amzn2023.0.7.src