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Fencer Vulns
high 8.8

CVE-2021-44648 json

GNOME gdk-pixbuf 2.42.6 is vulnerable to a heap-buffer overflow vulnerability when decoding the lzw compressed stream of image data in GIF…

published 2022-01-12 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-31469

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.0%
EPSS 2.0% chance of exploitation in 30 days, percentile 80%
public exploits
0
none known

Summary

GNOME gdk-pixbuf 2.42.6 is vulnerable to a heap-buffer overflow vulnerability when decoding the lzw compressed stream of image data in GIF files with lzw minimum code size equals to 12.

Patch / fix

  • gdk-pixbuf Debian 14, Debian 13, Debian 12 2.42.9+dfsg-1

debian advisories DEBIAN-CVE-2021-44648

  • gdk-pixbuf Ubuntu 20.04 LTS 2.40.0+dfsg-3ubuntu0.4
  • gdk-pixbuf Ubuntu 22.04 LTS 2.42.8+dfsg-1ubuntu0.1

ubuntu advisories UBUNTU-CVE-2021-44648

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • gdk-pixbuf2 RHEL 9 2.42.6-3.el9
  • gdk-pixbuf2-modules RHEL 9 2.42.6-3.el9

red hat advisories RHSA-2023:2216

  • gdk-pixbuf SLES for SAP 15 SP2, SLES 15 SP2-LTSS, SLES 15 SP2-BCL +11 more 2.40.0-150200.3.9.1
  • gdk-pixbuf SLE Module for Basesystem 15 SP4, openSUSE Leap 15.4 2.42.9-150400.5.6.1

suse advisories SUSE-SU-2022:3230-1SUSE-SU-2022:3153-1

  • gdk-pixbuf openSUSE Tumbleweed 2.42.9-3.1

opensuse advisories openSUSE-SU-2024:12296-1

  • gdk-pixbuf2 AlmaLinux 9 2.42.6-3.el9
  • gdk-pixbuf2-modules AlmaLinux 9 2.42.6-3.el9

almalinux advisories ALSA-2023:2216

  • gdk-pixbuf Alpine 3.24, Alpine 3.23, Alpine 3.22 +7 more 2.42.8-r0

alpine advisories ALPINE-CVE-2021-44648

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-44648 updated cvss 7.3

gdk-pixbuf: heap-buffer overflow when decoding the lzw compressed stream of image data

  • Red Hat Enterprise Linux AppStream (v. 9) gdk-pixbuf2 2.42.6-3.el9, gdk-pixbuf2-modules 2.42.6-3.el9
    fixed: vendor fix RHSA-2023:2216
  • Red Hat Enterprise Linux 6 gdk-pixbuf2 Red Hat Enterprise Linux 7 gdk-pixbuf2, gdk-pixbuf2-tests Red Hat Enterprise Linux 8 gdk-pixbuf2, gdk-pixbuf2-xlib, gdk-pixbuf2-modules
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.97% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • gitlab.gnome.org https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/issues/136 referenced PoC, tagged "exploit" by a source, unverified
  • sahildhar.github.io https://sahildhar.github.io/blogpost/GdkPixbuf-Heap-Buffer-Overflow-in-lzw_decoder_new/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.