CVE-2025-13151

State: Published
Severity: 7.5 High
Published: Jan 7, 2026
Updated: Jan 20, 2026
Reserved: Nov 13, 2025

Description

Stack-based buffer overflow in libtasn1 version: v4.20.0. The function fails to validate the size of input data resulting in a buffer overflow in asn1_expend_octet_string.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
libtasn1GnuTLS	4.20.0 and earlierAffected

References

Source Code Respoitory
Proposed Pull Requestpatch
http://www.openwall.com/lists/oss-security/2026/01/08/5
https://www.kb.cert.org/vuls/id/271649

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