CVE-2026-41565
7.5 HIGHCryptX versions before 0.088_001 for Perl have a stack buffer overflow in four AEAD decrypt_verify helpers
Published: 2026-05-28 · Last updated: 2026-05-29
Severity and scoring
- CVSS
- 7.5 HIGH
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CWE
- CWE-121
Description
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.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-41565
- [Other]https://github.com/DCIT/perl-CryptX/commit/57e69e541b0718ca8724c2f61514322a2d859bc1.patch
- [Other]https://github.com/DCIT/perl-CryptX/commit/7e56347d420aaf43b2ee1586f4a230492ccf1642.patch
- [Other]https://metacpan.org/release/MIK/CryptX-0.088_001
- [Other]http://www.openwall.com/lists/oss-security/2026/05/28/10
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