CVE-2025-13151

7.5 HIGH 1% exploit odds Fix listed Memory safety

What it is

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.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of service disruption.
Exploit odds: 1.4% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2026-01-07 22:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 08:33 UTC Last updatedMost recent change to the record

Details

Published: 2026-01-07 22:15 UTC
Last modified: 2026-06-17 08:33 UTC
Exploit probability: 1.4% · EPSS, next 30 days
Weakness: CWE-787 · Out-of-bounds write
Record status: Analyzed

Affected

Gnu libtasn1 4.20.0

Attack profile CVSS 3.1 · 7.5

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: High

Raw vector

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

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Fix and advisories

References

NVD record · CVE.org record