# CVE-2026-78465: gimp: A flaw was found in the file-pcx plugin in GIMP, affecting 32-bit builds only

CVE-2026-78465 is fixed in gimp on 1 platform, first by OPENSUSE-SU-2026:21869-1, released September 16, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-78465
- Priority: High
- CVSS: 7.0 (high)
- EPSS: 0.0028
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 24, 2026

## Description

A flaw was found in the file-pcx plugin in GIMP, affecting 32-bit builds only. When processing a PCX image file, the plugin calculates memory allocation sizes based on the image dimensions and the number of color planes. If a crafted file sets the number of planes to 4 alongside sufficiently large dimensions, the calculation exceeds the 32-bit integer limit and overflows, resulting in an undersized heap-based buffer allocation. This integer overflow issue results in a heap-based buffer overflow when the plugin subsequently writes image data into the undersized buffer, causing memory corruption, potentially leading to arbitrary code execution or a denial of service.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | gimp Debian 13.5 (trixie) | 3.0.4-3+deb13u11 | [DEBIAN-CVE-2026-78465](https://patchblox.com/security/data/fix/linux/debian-cve-2026-78465.md) | Sep 18, 2026 |
| Linux | gimp Debian 14 | 3.2.6-1 | [DEBIAN-CVE-2026-78465](https://patchblox.com/security/data/fix/linux/debian-cve-2026-78465.md) | Sep 18, 2026 |
| Linux | gimp opensuse-leap 16.0 | 3.0.8-bp160.9.1 | [OPENSUSE-SU-2026:21869-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21869-1.md) | Sep 16, 2026 |
| Linux | gimp sles 15.7 | 2.10.30-150400.3.74.1 | [SUSE-SU-2026:4309-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4309-1.md) | Sep 23, 2026 |

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Data as of 2026-11-07T18:46:35Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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