CVE-2026-16768 Gdk-pixbuf: out-of-bounds read in ico parser
An attacker can extract heap memory content by crafting a malicious ICO file that triggers an out-of-bounds read in the gdk-pixbuf library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-16768?
CVE-2026-16768 is a medium-severity vulnerability in GNOME Red Hat Enterprise Linux 10, published on 23 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-125
Which versions are affected by CVE-2026-16768?
How do I fix CVE-2026-16768?
Apply the vendor's patch.
Is CVE-2026-16768 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-16768 exists.
Sources
Also known as AZL-93330, BELL-CVE-2026-16768, DEBIAN-CVE-2026-16768, ECHO-061d-26c1-7775, GHSA-744w-9fjj-p376, UBUNTU-CVE-2026-16768.