CVE-2020-23922

Publication date 21 April 2021

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

An issue was discovered in giflib through 5.1.4. DumpScreen2RGB in gif2rgb.c has a heap-based buffer over-read.

Show unmaintained releases

Package	Ubuntu Release	Status
giflib	24.04 LTS noble	Not affected
	23.10 mantic	Not affected
	23.04 lunar	Ignored end of life, was deferred [2024-02-02]
	22.10 kinetic	Ignored end of life, was deferred [2024-02-02]
	22.04 LTS jammy	Not affected
	21.10 impish	Ignored end of life
	21.04 hirsute	Ignored end of life
	20.10 groovy	Ignored end of life
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not in release

one of the commits listes below likely fixes this issue.

looks like the patch for CVE-2016-3977 fixes the issue.

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/368f28c0034ecfb6dd4b3412af4cc589a56e0611/ Upstream: https://sourceforge.net/p/giflib/code/ci/fd0f408bd6dbc6ca33f0593d17164f9cb113a8ce/ Upstream: https://sourceforge.net/p/giflib/code/ci/ccbc956432650734c91acb3fc88837f7b81267ff/ Upstream: https://sourceforge.net/p/giflib/code/ci/ea8dbc5786862a3e16a5acfa3d24e2c2f608cd88/