CVE-2021-40633

Publication date 14 June 2022

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

A memory leak (out-of-memory) in gif2rgb in util/gif2rgb.c in giflib 5.1.4 allows remote attackers trigger an out of memory exception or denial of service via a gif format file.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
giflib	24.04 LTS noble	Not affected
	23.10 mantic	Fixed 5.2.1-2.5ubuntu0.1
	23.04 lunar	Ignored end of life, was deferred [2024-02-02]
	22.10 kinetic	Ignored end of life, was deferred [2022-06-22]
	22.04 LTS jammy	Fixed 5.1.9-2ubuntu0.1
	21.10 impish	Ignored end of life
	20.04 LTS focal	Fixed 5.1.9-1ubuntu0.1
	18.04 LTS bionic	Fixed 5.1.4-2ubuntu0.1+esm1
	16.04 LTS xenial	Fixed 5.1.4-0.3~16.04.1+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
giflib	Upstream: https://sourceforge.net/p/giflib/code/ci/ccbc956432650734c91acb3fc88837f7b81267ff/

Severity score breakdown

Parameter	Value
Base score	8.8 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H