Amazon Linux 2023 Security Advisory: ALAS2023-2026-1834
Advisory Released Date: 2026-06-22
Advisory Updated Date: 2026-06-22
Severity:
Important
Issue Overview:
CryptX versions before 0.088_001 for Perl have a stack buffer overflow in four AEAD decrypt_verify helpers.
The gcm_decrypt_verify, ccm_decrypt_verify, chacha20poly1305_decrypt_verify and eax_decrypt_verify XS routines copied the caller-supplied authentication tag into a fixed 144-byte stack buffer (MAXBLOCKSIZE) without checking the supplied length. A longer tag overwrites the stack past the buffer. Version 0.088 added the clamp to gcm_decrypt_verify, and 0.088_001 added it to the other three.
Any caller of an affected helper that forwards an attacker-controlled tag longer than the buffer can trigger the overflow. (CVE-2026-41565)
Affected Packages:
perl-CryptX
Issue Correction:
Run dnf update perl-CryptX --releasever 2023.12.20260622 or dnf update --advisory ALAS2023-2026-1834 --releasever 2023.12.20260622 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:
perl-CryptX-debuginfo-0.088-2.amzn2023.0.3.aarch64
perl-CryptX-debugsource-0.088-2.amzn2023.0.3.aarch64
perl-CryptX-0.088-2.amzn2023.0.3.aarch64
noarch:
perl-CryptX-tests-0.088-2.amzn2023.0.3.noarch
src:
perl-CryptX-0.088-2.amzn2023.0.3.src
x86_64:
perl-CryptX-debuginfo-0.088-2.amzn2023.0.3.x86_64
perl-CryptX-debugsource-0.088-2.amzn2023.0.3.x86_64
perl-CryptX-0.088-2.amzn2023.0.3.x86_64