CVE-2025-13151

Published: Jan 7, 2026Modified: Jun 17, 2026

7.5

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitability: 3.9 / Impact: 3.6

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

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.

Affected (1)

Products: Gnu: Libtasn1

Gnu

1 product

Libtasn1

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Gnu Libtasn1	Version 4.20.0

Related CWEs

CWE-787

Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

References (4)

https://gitlab.com/gnutls/libtasn1

Source: cret@cert.org

Product

https://gitlab.com/gnutls/libtasn1/-/merge_requests/121

Source: cret@cert.org

Patch

http://www.openwall.com/lists/oss-security/2026/01/08/5

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing ListPatch

https://www.kb.cert.org/vuls/id/271649

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

Timeline

No history available yet.