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

Routine

HIGH 7.0UPGRADE

CVE-2026-78465 is a high-severity flaw (CVSS 7.0) affecting gimp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 overf

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.0 (High)
Attack vector	Local
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 80%)
CISA exploited list	No
Weakness	CWE-190
Published	2026-08-24
Last modified	2026-10-14

Publisher (CNA): Red Hat, Inc. · Vendor: gimp

Last updated 2026-10-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-24 17:18 UTCPublished CVE record published
2026-10-14 13:10 UTCUpdated Record last modified

gimp gimp UPGRADE

Affected: >= 3.0.0 and <= 3.2.4 · 3.3.1

Fixed in: newer than 3.2.4

Safe to downgrade to: a release before 3.0.0

1. Check installed version

apt-cache policy gimp || rpm -q gimp || gimp --version

2. UPGRADE to newer than 3.2.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade gimp

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade gimp

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 3.0.0 (Debian / Ubuntu)

apt-cache madison gimp sudo apt install gimp=<VERSION_BEFORE_3.0.0> sudo apt-mark hold gimp

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list gimp sudo dnf downgrade gimp-<VERSION_BEFORE_3.0.0> sudo dnf versionlock add gimp

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-78465?

gimp: upgrade to newer than 3.2.4. Exact commands for each OS are on this page.

Is CVE-2026-78465 being exploited?

CVE-2026-78465 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-78465 affect?

CVE-2026-78465 affects gimp. Severity is high (CVSS 7.0). 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 s

How urgent is CVE-2026-78465?

Priority 35/100. High severity; Public exploit reference

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References

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