CVE-2026-78465Gimp: integer overflow in pcx loader (planes=4) leads to heap overflow on 32-bit
Updated under an hour ago ()
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It affects GNOME GIMP and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.0 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-190
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Analyzed
- Record last updated
- Aug 31, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
GNOME GIMP gnome:gimp (from the name) | All versions | CNA record |
Red Hat Red Hat Enterprise Linux 6 redhat:enterprise_linux | 6 | CNA record |
gimp gimp gimp:gimp | from 3.0.0 through 3.2.4; 3.3.1 | NVD |
References
- https://access.redhat.com/security/cve/CVE-2026-78465vdb-entry, x-refsource-redhat, vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2522057issue-tracking, x-refsource-redhat, vendor-advisory
- https://gitlab.gnome.org/GNOME/gimp/-/work_items/16578issue-tracking, vendor-advisory, exploit, mitigation
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.