Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-78465

CVE-2026-78465HIGH

GNOME GIMP — Gimp: integer overflow in pcx loader (planes=4) leads to heap overflow on 32-bit

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   H   N   R  U  H  H  H    7.0   .0028   18.6     —

AFFECTED
  Product                     Versions     Fixed
  GIMP                        unspecified  —
  Red Hat Enterprise Linux 6  unspecified  —
  Red Hat Enterprise Linux 7  unspecified  —
  Red Hat Enterprise Linux 8  unspecified  —
  Red Hat Enterprise Linux 9  unspecified  —

TIMELINE
  Aug 24  Reserved by redhat
  Aug 24  Published (CNA: redhat)
  Sep 1   EXPLOIT PUBLISHED — CVE-2026-78465 (GNOME GIMP). Public exploit reference added.

CWE-190 · CNA: redhat · CVSS v3.1 · 3 references · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
August 24, 2026	Reserved	Reserved by redhat
August 24, 2026	Published	Published (CNA: redhat)
September 1, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-78465 (GNOME GIMP). Public exploit reference added.

Affected

Affected products and packages — 5 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
GNOME	GIMP	—	—	—
Red Hat	Red Hat Enterprise Linux 6	—	—	—
Red Hat	Red Hat Enterprise Linux 7	—	—	—
Red Hat	Red Hat Enterprise Linux 8	—	—	—
Red Hat	Red Hat Enterprise Linux 9	—	—	—

Weaknesses

CWE-190

References (3)

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]

Authoritative record: CVE-2026-78465 at cve.org

Vendors: gnome · red hat

Weaknesses: CWE-190

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-78465 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.