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From: Salvatore Bonaccorso <carnil@debian.org>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: gimp: CVE-2026-66759
Message-ID: <178532912144.778154.18383500802416734877.reportbug@eldamar.lan>
X-Mailer: reportbug 13.2.0+nmu1
Date: Wed, 29 Jul 2026 14:45:21 +0200
Delivered-To: submit@bugs.debian.org

Source: gimp
Version: 3.2.4-3
Severity: important
Tags: security upstream
Forwarded: https://gitlab.gnome.org/GNOME/gimp/-/issues/16528
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>

Hi,

The following vulnerability was published for gimp.

CVE-2026-66759[0]:
| 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.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-66759
    https://www.cve.org/CVERecord?id=CVE-2026-66759
[1] https://gitlab.gnome.org/GNOME/gimp/-/issues/16528
[2] https://gitlab.gnome.org/GNOME/gimp/-/commit/abb3129a8ecb79bf3af6df03bc35ddf8f7aaba20

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore
]