A flaw was found in the file-icns plugin in GIMP.
CVE-2026-66759
A flaw was found in the file-icns plugin in GIMP. When applying a decompressed mask during ICNS image processing, the plugin reads from the mask data buffer without verifying if the cursor exceeds the allocated resource size. If a crafted file contains a truncated mask resource, the icnsdecompress function continues reading past the bounds of the buffer. This out-of-bounds read vulnerability results in information disclosure of heap contents, where memory contents are leaked as alpha channel pixel values, or a crash leading to a denial of service if unmapped memory is accessed.
Assessment
- CVSS
- 7.1 (v3.1)
- Severity
- High
- EPSS
- 0.31% chance of exploitation in the next 30 days
- Known exploited
- Not listed in CISA KEV
- Exploit availability
- Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
- Published
- 27 July 2026
- Last updated
- 5 November 2026
- Affected
- Gnome · Red Hat · GIMP · Red Hat Enterprise Linux 9
- Assigner
- redhat
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
At the source
References
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