CVE-2025-13601

Publication date 26 November 2025

Last updated 10 February 2026

Ubuntu priority

Cvss 3 Severity Score

Description

A heap-based buffer overflow problem was found in glib through an incorrect calculation of buffer size in the g_escape_uri_string() function. If the string to escape contains a very large number of unacceptable characters (which would need escaping), the calculation of the length of the escaped string could overflow, leading to a potential write off the end of the newly allocated string.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
glib2.0	25.10 questing	Fixed 2.86.0-2ubuntu0.1
	25.04 plucky	Fixed 2.84.1-1ubuntu0.2
	24.04 LTS noble	Fixed 2.80.0-6ubuntu3.6
	22.04 LTS jammy	Fixed 2.72.4-0ubuntu2.7
	20.04 LTS focal	Fixed 2.64.6-1~ubuntu20.04.9+esm1
	18.04 LTS bionic	Fixed 2.56.4-0ubuntu0.18.04.9+esm5
	16.04 LTS xenial	Fixed 2.48.2-0ubuntu4.8+esm5
	14.04 LTS trusty	Fixed 2.40.2-0ubuntu1.1+esm7

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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
glib2.0	Upstream: 9bcd65b Upstream: 7e5489c

Severity score breakdown

Parameter	Value
Base score	7.7 · High
Attack vector	Local
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H