CVE-2025-13151

Publication date 8 January 2026

Last updated 11 February 2026

Ubuntu priority

Cvss 3 Severity Score

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.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
libtasn1-6	25.10 questing	Fixed 4.20.0-2ubuntu0.25.10.1
	25.04 plucky	Fixed 4.20.0-2ubuntu0.25.04.1
	24.04 LTS noble	Fixed 4.19.0-3ubuntu0.24.04.2
	22.04 LTS jammy	Fixed 4.18.0-4ubuntu0.2
	20.04 LTS focal	Fixed 4.16.0-2ubuntu0.1+esm1
	18.04 LTS bionic	Fixed 4.13-2ubuntu0.1~esm1
	16.04 LTS xenial	Fixed 4.7-3ubuntu0.16.04.3+esm4
	14.04 LTS trusty	Fixed 3.4-3ubuntu0.6+esm1

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
libtasn1-6	Upstream: d276cc4

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H