CVE-2025-15279

Publication date 31 December 2025

Last updated 29 April 2026

Ubuntu priority

Cvss 3 Severity Score

Description

FontForge GUtils BMP File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of FontForge. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of pixels within BMP files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current user. Was ZDI-CAN-27517.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
fontforge	26.04 LTS resolute	Needs evaluation
	25.10 questing	Needs evaluation
	25.04 plucky	Ignored end of life, was deferred [2026-01-05]
	24.04 LTS noble	Needs evaluation
	22.04 LTS jammy	Needs evaluation
	20.04 LTS focal	Needs evaluation
	18.04 LTS bionic	Needs evaluation
	16.04 LTS xenial	Needs evaluation

Notes

hlibk

The CVE fix introduced a regression, which was fixed in pull request 5723. So, both pull requests need to be backported.

Patch details

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

Package	Patch details
fontforge	Upstream: https://github.com/fontforge/fontforge/pull/5720 Upstream: https://github.com/fontforge/fontforge/pull/5723

Severity score breakdown

Parameter	Value
Base score	7.8 · High
Attack vector	Local
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H