CVE-2020-29385

Name: CVE-2020-29385
Creator: NVD / NIST
Published: 2020-12-26T02:15:12.807+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 1.48%

Last modified Jun 17, 2026

CVE-2020-29385 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. GNOME gdk-pixbuf (aka GdkPixbuf) before 2.42.2 allows a denial of service (infinite loop) in lzw.c in the function write_indexes. if c->self_code equals 10, self->code_table[10].extends will assign the value 11 to c. EPSS estimates a 1.48% chance of exploitation in the next 30 days.

Description

GNOME gdk-pixbuf (aka GdkPixbuf) before 2.42.2 allows a denial of service (infinite loop) in lzw.c in the function write_indexes. if c->self_code equals 10, self->code_table[10].extends will assign the value 11 to c. The next execution in the loop will assign self->code_table[11].extends to c, which will give the value of 10. This will make the loop run infinitely. This bug can, for example, be triggered by calling this function with a GIF image with LZW compression that is crafted in a special way.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

1.48%

70.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-835

Affected Software

Vendor	Product	Versions
Gnome	Gdk-Pixbuf	> 2.39.2, < 2.42.2
Canonical	Ubuntu Linux	20.04
Canonical	Ubuntu Linux	20.10
Fedoraproject	Fedora	33
Fedoraproject	Fedora	34

References

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=977166Issue Tracking, Third Party Advisory
https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/blob/master/NEWSRelease Notes, Vendor Advisory
https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/issues/164Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B5H3GNVWMZTYZR3JBYCK57PF7PFMQBNP/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BGZVCTH5O7WBJLYXZ2UOKLYNIFPVR55D/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EANWYODLOJDFLMBH6WEKJJMQ5PKLEWML/Mailing List, Third Party Advisory
https://security.gentoo.org/glsa/202012-15Third Party Advisory
https://ubuntu.com/security/CVE-2020-29385Patch, Third Party Advisory
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=977166Issue Tracking, Third Party Advisory
https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/blob/master/NEWSRelease Notes, Vendor Advisory
https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/issues/164Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B5H3GNVWMZTYZR3JBYCK57PF7PFMQBNP/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BGZVCTH5O7WBJLYXZ2UOKLYNIFPVR55D/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EANWYODLOJDFLMBH6WEKJJMQ5PKLEWML/Mailing List, Third Party Advisory
https://security.gentoo.org/glsa/202012-15Third Party Advisory
https://ubuntu.com/security/CVE-2020-29385Patch, Third Party Advisory

Timeline

Published: Dec 26, 2020
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2020-29385?

How severe is CVE-2020-29385?

CVE-2020-29385 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 1.48% probability of exploitation in the next 30 days.

How do I fix CVE-2020-29385?

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-2020-29385?

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

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Source: NVD / NIST