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CVE-2025-13151

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Date: January 7, 2026

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.

Severity Score

Related Resources (6)

https://gitlab.com/gnutls/libtasn1
https://nvd.nist.gov/vuln/detail/CVE-2025-13151
http://www.openwall.com/lists/oss-security/2026/01/08/5
https://gitlab.com/gnutls/libtasn1/-/merge_requests/121
https://www.kb.cert.org/vuls/id/271649
https://www.mend.io/vulnerability-database/CVE-2025-13151

Severity Score

Weakness Type (CWE)

Out-of-bounds Write

CWE-787

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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