# CVE-2020-29385: gir1.2-gdkpixbuf-2.0: GNOME gdk-pixbuf (aka GdkPixbuf) before 2.42.2 allows a denial of service (infinite loop) in lzw.c in the function wr...

CVE-2020-29385 is fixed in 4 products on 1 platform, first by gir1.2-gdkpixbuf-2.0 2.40.0+dfsg-3ubuntu0.1, released December 7, 2020. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2020-29385
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0154
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 7, 2020

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | gir1.2-gdkpixbuf-2.0 Ubuntu 20.04 LTS (focal) | 2.40.0+dfsg-3ubuntu0.1 | [gir1.2-gdkpixbuf-2.0 2.40.0+dfsg-3ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-gir1.2-gdkpixbuf-2.0-2.40.0-dfsg-3ubuntu0.1.md) | Dec 7, 2020 |
| Linux | libgdk-pixbuf2.0-0 Ubuntu 20.04 LTS (focal) | 2.40.0+dfsg-3ubuntu0.1 | [libgdk-pixbuf2.0-0 2.40.0+dfsg-3ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libgdk-pixbuf2.0-0-2.40.0-dfsg-3ubuntu0.1.md) | Dec 7, 2020 |
| Linux | libgdk-pixbuf2.0-bin Ubuntu 20.04 LTS (focal) | 2.40.0+dfsg-3ubuntu0.1 | [libgdk-pixbuf2.0-bin 2.40.0+dfsg-3ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libgdk-pixbuf2.0-bin-2.40.0-dfsg-3ubuntu0.1.md) | Dec 7, 2020 |
| Linux | libgdk-pixbuf2.0-common Ubuntu 20.04 LTS (focal) | 2.40.0+dfsg-3ubuntu0.1 | [libgdk-pixbuf2.0-common 2.40.0+dfsg-3ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libgdk-pixbuf2.0-common-2.40.0-dfsg-3ubuntu0.1.md) | Dec 7, 2020 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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