CVE-2021-46829

Name: CVE-2021-46829
Creator: NVD / NIST
Published: 2022-07-24T19:15:10.097+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.73%

Last modified Jun 17, 2026

CVE-2021-46829 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. GNOME GdkPixbuf (aka GDK-PixBuf) before 2.42.8 allows a heap-based buffer overflow when compositing or clearing frames in GIF files, as demonstrated by io-gif-animation.c composite_frame. This overflow is controllable and could be abused for code execution, especially on 32-bit systems.. EPSS estimates a 0.73% chance of exploitation in the next 30 days.

Description

GNOME GdkPixbuf (aka GDK-PixBuf) before 2.42.8 allows a heap-based buffer overflow when compositing or clearing frames in GIF files, as demonstrated by io-gif-animation.c composite_frame. This overflow is controllable and could be abused for code execution, especially on 32-bit systems.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

0.73%

49.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-190

Affected Software

Vendor	Product	Versions
Gnome	Gdk-Pixbuf	< 2.42.8
Fedoraproject	Fedora	35
Debian	Debian Linux	11.0

References

http://www.openwall.com/lists/oss-security/2022/07/25/1Mailing List, Third Party Advisory
https://github.com/pedrib/PoC/blob/master/fuzzing/CVE-2021-46829/CVE-2021-46829.mdExploit, Third Party Advisory
https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/commit/5398f04d772f7f8baf5265715696ed88db0f0512Patch, Third Party Advisory
https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/commit/bca00032ad68d0b0aa2c1f7558db931e52bd9cd2Patch, Third Party Advisory
https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/issues/190Exploit, Issue Tracking, Third Party Advisory
https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/merge_requests/121Exploit, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M5IHHEYFD6GDZVALKIPPRD2U4JNZUZWR/
https://www.debian.org/security/2022/dsa-5228Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/07/23/1Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/07/25/1Mailing List, Third Party Advisory
https://github.com/pedrib/PoC/blob/master/fuzzing/CVE-2021-46829/CVE-2021-46829.mdExploit, Third Party Advisory
https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/commit/5398f04d772f7f8baf5265715696ed88db0f0512Patch, Third Party Advisory
https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/commit/bca00032ad68d0b0aa2c1f7558db931e52bd9cd2Patch, Third Party Advisory
https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/issues/190Exploit, Issue Tracking, Third Party Advisory
https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/merge_requests/121Exploit, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M5IHHEYFD6GDZVALKIPPRD2U4JNZUZWR/
https://www.debian.org/security/2022/dsa-5228Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/07/23/1Mailing List, Third Party Advisory

Timeline

Published: Jul 24, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-46829?

How severe is CVE-2021-46829?

CVE-2021-46829 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.73% probability of exploitation in the next 30 days.

How do I fix CVE-2021-46829?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-46829?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST