5.3 Medium

CVE-2026-16768 Gdk-pixbuf: out-of-bounds read in ico parser

Description

A flaw was found in gdk-pixbuf. When parsing a specially crafted ICO file with pixel values that exceed the defined palette range, an out-of-bounds read can occur due to improper bounds checking against the actual palette size. This vulnerability causes heap bytes to be interpreted as valid palette indices and rendered as RGB pixel values in the output image, allowing an attacker to extract heap content via the generated output, such as a thumbnail.

CVSS 3.1 detail

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Exploitable remotely over the network, without an account and without any user action; the impact on data or service is limited.

Attack vector: Network
Attack complexity: Low
Privileges required: None
Interaction: None
Scope: Unchanged
Confidentiality: Low
Integrity: None
Availability: None

Affected products and versions

Product	Affected versions	Fixed in
Red Hat Enterprise Linux 10	Versions not published
Red Hat Enterprise Linux 6	Versions not published
Red Hat Enterprise Linux 7	Versions not published
Red Hat Enterprise Linux 8	Versions not published
Red Hat Enterprise Linux 9	Versions not published
Gdk-Pixbuf	Versions not published

References

access.redhat.com access.redhat.com
RHBZ#2506437 bugzilla.redhat.com
gitlab.gnome.org gitlab.gnome.org

Timeline

Published July 23, 2026
Last modified November 5, 2026

The 1455 CVEs of Red Hat Enterprise Linux 10 →

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