CVE-2025-13151
Unknown Unknown - Not Provided
Stack-Based Buffer Overflow in libtasn1 v4.20.0 ASN.1 Parsing

Publication date: 2026-01-07

Last updated on: 2026-02-02

Assigner: CERT/CC

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.
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Meta Information
Published
2026-01-07
Last Modified
2026-02-02
Generated
2026-06-16
AI Q&A
2026-01-08
EPSS Evaluated
2026-06-15
NVD
CVE-2025-13151
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
gnutls libtasn1 4.20.0
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.
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Executive Summary

This vulnerability is a stack-based buffer overflow in libtasn1 version 4.20.0. It occurs because the function asn1_expend_octet_string fails to properly validate the size of input data, which can lead to a buffer overflow.

Impact Analysis

The vulnerability can lead to a buffer overflow, which may cause a denial of service or potentially allow an attacker to execute arbitrary code, impacting the availability of the affected system.

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