VULNERABILITY INTELLIGENCE

CVE-2026-66759

CVSS score7.1 HIGH
EPSS probability0.30%
CISA KEVNot currently listed
Published2026-07-27
Last modified2026-08-24
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

Description

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 icns_decompress 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.

Weakness classification

  • secalert@redhat.com: CWE-125

Primary references