CVE-2026-78465

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 v3 7.0 HIGH

7.0^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.0 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-78465	Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2522057	Issue Tracking Vendor Advisory
https://gitlab.gnome.org/GNOME/gimp/-/work_items/16578	Issue Tracking Vendor Advisory Exploit Mitigation
https://gitlab.gnome.org/GNOME/gimp/-/work_items/16578	Issue Tracking Vendor Advisory Exploit Mitigation

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:gimp:gimp::::::::
	cpe:2.3:a:gimp:gimp:3.3.1:::::::*

History

No history.

Information

Published : 2026-08-24 17:18

Updated : 2026-09-01 14:23

NVD link : CVE-2026-78465

Mitre link : CVE-2026-78465

CVE.ORG link : CVE-2026-78465

JSON object : View

Products Affected

gimp

gimp

CWE

CWE-190

Integer Overflow or Wraparound

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