Description
A flaw was found in the GIF parser of GdkPixbuf’s LZW decoder. When an invalid symbol is encountered during decompression, the decoder sets the reported output size to the full buffer length rather than the actual number of written bytes. This logic error results in uninitialized sections of the buffer being included in the output, potentially leaking arbitrary memory contents in the processed image.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | gdk-pixbuf | < 2.43.2 | 2.43.2 |
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | gdk-pixbuf | 2.42.12+dfsg-3 | — |
| Debian 13 | gdk-pixbuf | 2.42.12+dfsg-3 | — |
| Debian 12 | gdk-pixbuf | 2.42.10+dfsg-1+deb12u2 | DSA-5946-1 |
| Debian 11 | gdk-pixbuf | 2.42.2+dfsg-1+deb11u3 | DLA-4225-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.10 | gdk-pixbuf | 2.42.12+dfsg-4build1 | — |
| Ubuntu 24.04 LTS | gdk-pixbuf | 2.42.10+dfsg-3ubuntu3.2 | USN-7662-1 |
| Ubuntu 22.04 LTS | gdk-pixbuf | 2.42.8+dfsg-1ubuntu0.4 | USN-7662-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | gdk-pixbuf | 2.40.0+dfsg-3ubuntu0.5+esm1 | USN-7662-1 |
| Ubuntu Pro 18.04 LTS | gdk-pixbuf | 2.36.11-2ubuntu0.1~esm2 | USN-7662-1 |
| Ubuntu Pro 16.04 LTS | gdk-pixbuf | 2.32.2-1ubuntu1.6+esm2 | USN-7662-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | gdk-pixbuf | 2.42.12-150600.3.8.1 | SUSE-SU-2025:02954-1 |
| SLES 15 SP6 | gdk-pixbuf | 2.42.12-150600.3.8.1 | SUSE-SU-2025:02954-1 |
| SLES 15 SP5 | gdk-pixbuf | 2.42.12-150400.5.14.1 | SUSE-SU-2025:02963-1 |
| SLES 15 SP4 | gdk-pixbuf | 2.42.12-150400.5.14.1 | SUSE-SU-2025:02963-1 |
| SLES 15 SP3 | gdk-pixbuf | 2.40.0-150200.3.15.2 | SUSE-SU-2025:03373-1 |
Show 18 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | gdk-pixbuf | 2.42.12-160000.3.1 | SUSE-SU-2026:20128-1 |
| SLES for SAP 15 SP5 | gdk-pixbuf | 2.42.12-150400.5.14.1 | SUSE-SU-2025:02963-1 |
| SLES for SAP 15 SP4 | gdk-pixbuf | 2.42.12-150400.5.14.1 | SUSE-SU-2025:02963-1 |
| SLES for SAP 15 SP3 | gdk-pixbuf | 2.40.0-150200.3.15.2 | SUSE-SU-2025:03373-1 |
| SLES 16.0 | gdk-pixbuf | 2.42.12-160000.3.1 | SUSE-SU-2026:20128-1 |
| SLE Micro 6.2 | gdk-pixbuf | 2.42.12-160000.3.1 | SUSE-SU-2026:20156-1 |
| SLE Micro 6.1 | gdk-pixbuf | 2.42.12-slfo.1.1_2.1 | SUSE-SU-2025:20748-1 |
| SLE Micro 6.0 | gdk-pixbuf | 2.42.12-3.1 | SUSE-SU-2025:20694-1 |
| SLE Micro 5.5 | gdk-pixbuf | 2.42.12-150400.5.14.1 | SUSE-SU-2025:02963-1 |
| SLE Micro 5.4 | gdk-pixbuf | 2.42.12-150400.5.14.1 | SUSE-SU-2025:02963-1 |
| SLE Micro 5.3 | gdk-pixbuf | 2.42.12-150400.5.14.1 | SUSE-SU-2025:02963-1 |
| SLE Micro 5.2 | gdk-pixbuf | 2.40.0-150200.3.15.2 | SUSE-SU-2025:03373-1 |
| SLE HPC 15 SP5 | gdk-pixbuf | 2.42.12-150400.5.14.1 | SUSE-SU-2025:02963-1 |
| SLE HPC 15 SP4 | gdk-pixbuf | 2.42.12-150400.5.14.1 | SUSE-SU-2025:02963-1 |
| SLE HPC 15 SP3 | gdk-pixbuf | 2.40.0-150200.3.15.2 | SUSE-SU-2025:03373-1 |
| SUSE Manager Server LTS 4.3 | gdk-pixbuf | 2.42.12-150400.5.14.1 | SUSE-SU-2025:02963-1 |
| SUSE Manager Proxy LTS 4.3 | gdk-pixbuf | 2.42.12-150400.5.14.1 | SUSE-SU-2025:02963-1 |
| SUSE Enterprise Storage 7.1 | gdk-pixbuf | 2.40.0-150200.3.15.2 | SUSE-SU-2025:03373-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | gdk-pixbuf | 2.42.12-4.1 | openSUSE-SU-2025:15397-1 |
| openSUSE Leap 16.0 | gdk-pixbuf | 2.42.12-160000.3.1 | openSUSE-SU-2026:20084-1 |
| openSUSE Leap 15.6 | gdk-pixbuf | 2.42.12-150600.3.8.1 | SUSE-SU-2025:02954-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | gdk-pixbuf2 +3 | 2.42.12-12.amzn2023 | ALAS2023-2026-1553, ALAS2023-2025-1120 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | gdk-pixbuf2 | 2.42.10-4 | — |
| Azure Linux 2 (CBL-Mariner) | gdk-pixbuf2 | 2.40.0-8 | — |
Advisories 15
- USN-7662-1 gdk-pixbuf vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- ALAS2023-2026-1553 Important: gdk-pixbuf2 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Apr 21, 2026
- openSUSE-SU-2026:20084-1 Security update for gdk-pixbuf SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15397-1 gdk-pixbuf-devel-2.42.12-4.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20156-1 Security update for gdk-pixbuf SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20128-1 Security update for gdk-pixbuf SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:02963-1 Security update for gdk-pixbuf SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20748-1 Security update for gdk-pixbuf SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20694-1 Security update for gdk-pixbuf SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:02954-1 Security update for gdk-pixbuf SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:03373-1 Security update for gdk-pixbuf SUSE / openSUSE Security Updates · Mar 23, 2026
- DSA-5946-1 gdk-pixbuf - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-4225-1 gdk-pixbuf - security update Debian Security (DSA / DLA) · Mar 9, 2026
- WID-SEC-2025-2049 gdk-pixbuf: Schwachstelle ermöglicht Offenlegung von Informationen BSI CERT-Bund (WID) · Jan 28, 2026
- ALAS2023-2025-1120 Important: gdk-pixbuf2 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Aug 8, 2025