A flaw was found in the file-pcx plugin in GIMP, affecting 32-bit builds only. (CVE-2026-78465)
Description
A heap-based buffer overflow vulnerability exists in the file-pcx plugin of GIMP affecting 32-bit builds. The flaw arises from an integer overflow during memory allocation size calculation when processing crafted PCX image files with 4 color planes and large dimensions. This results in undersized heap allocation and subsequent memory corruption, potentially leading to arbitrary code execution or denial of service. The issue affects multiple specific GIMP versions listed, primarily on Ubuntu builds. The CVSS score is 7.0, indicating a medium severity level.
CVSS v3.1
Score 7.0high
Affected software
pkg:deb/ubuntu/gimp?arch=source&distro=esm-apps/xenialpkg:deb/ubuntu/gimp?arch=source&distro=esm-apps/bionicpkg:deb/ubuntu/gimp?arch=source&distro=esm-apps/focalpkg:deb/ubuntu/gimp?arch=source&distro=esm-apps/jammypkg:deb/ubuntu/gimp?arch=source&distro=esm-apps/noblepkg:deb/ubuntu/gimp?arch=source&distro=stonkingpkg:deb/ubuntu/gimp?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-78465 is a vulnerability in the file-pcx plugin of GIMP 32-bit builds where an integer overflow occurs during memory allocation size calculation for PCX image files. When a crafted PCX file specifies 4 color planes with sufficiently large dimensions, the calculation exceeds the 32-bit integer limit, causing an undersized heap buffer allocation. Subsequent writes to this buffer lead to a heap-based buffer overflow, resulting in memory corruption that could allow arbitrary code execution or denial of service. The vulnerability affects numerous specific GIMP versions primarily distributed on Ubuntu. There is no explicit patch or remediation information provided in the source data.
Potential Impact
The vulnerability can cause memory corruption due to a heap-based buffer overflow, which may lead to arbitrary code execution or denial of service on affected 32-bit GIMP builds when processing maliciously crafted PCX image files.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid opening untrusted PCX image files with affected 32-bit GIMP versions.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-78465
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:Pro:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:Pro:22.04:LTS","Ubuntu:Pro:24.04:LTS","Ubuntu:26.10","Ubuntu:26.04:LTS"]
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ad3f5702cdf04f656662118
Added to database: 10/17/2026, 22:23:44 UTC
Last enriched: 10/17/2026, 23:39:07 UTC
Last updated: 10/17/2026, 23:39:07 UTC
Views: 3
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