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 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.

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/errata/RHSA-2026:50817	Issue Tracking
https://access.redhat.com/security/cve/CVE-2026-66759	Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2507557	Issue Tracking Vendor Advisory
https://gitlab.gnome.org/GNOME/gimp/-/issues/16528	Exploit Issue Tracking Vendor Advisory
https://gitlab.gnome.org/GNOME/gimp/-/issues/16528	Exploit Issue Tracking Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:gimp:gimp:3.0.8:::::::*
	cpe:2.3:a:gimp:gimp:3.2.4:::::::*
	cpe:2.3:o:redhat:enterprise_linux:6.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:7.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:9.0:::::::*

History

No history.

Information

Published : 2026-07-27 19:17

Updated : 2026-08-24 18:17

NVD link : CVE-2026-66759

Mitre link : CVE-2026-66759

CVE.ORG link : CVE-2026-66759

JSON object : View

Products Affected

redhat

enterprise_linux

gimp

gimp

CWE

CWE-125

Out-of-bounds Read

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