CVE-2025-13151

HIGH

libtasn1 v4.20.0 - Stack-based Buffer Overflow in asn1_expend_octet_string

Title source: llm

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.

References (4)

Core 4

Core References

Product

https://gitlab.com/gnutls/libtasn1

View Writeup ZIP pw:eip

Mailing List, Patch

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

Third Party Advisory

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

Patch patch

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

Scores

CVSS v3 7.5

EPSS 0.0111

EPSS Percentile 61.9%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-787

Status published

Products (1)

gnu/libtasn1 4.20.0

Published Jan 07, 2026

Tracked Since Feb 18, 2026