Amazon Linux 2023 Security Advisory: ALAS2023-2026-2073
Advisory Released Date: 2026-08-31
Advisory Updated Date: 2026-08-31
Severity:
Important
Issue Overview:
When initializing an RSA public key from DER or PEM bytes throws an error, the EVP_PKEY* is double-freed: first in the catch block, then in the deinit. This can lead to a crash on future memory allocations. This double-free manifests when BoringSSL cannot decode the public key from the bytes provided. This vulnerability is addressed in swift-crypto version 4.5.1. (CVE-2026-43823)
Affected Packages:
swiftlang
Issue Correction:
Run dnf update swiftlang --releasever 2023.12.20260831 or dnf update --advisory ALAS2023-2026-2073 --releasever 2023.12.20260831 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation
New Packages:
aarch64:
swiftlang-lib-6.3-1.amzn2023.0.2.aarch64
swiftlang-6.3-1.amzn2023.0.2.aarch64
src:
swiftlang-6.3-1.amzn2023.0.2.src
x86_64:
swiftlang-lib-6.3-1.amzn2023.0.2.x86_64
swiftlang-6.3-1.amzn2023.0.2.x86_64