CVE-2026-18090 Gdk-pixbuf: gdk-pixbuf: heap out-of-bounds read in uncompress() via crafted icns rle block
A remote attacker can cause a crash or leak memory by providing a crafted ICNS file to applications using gdk-pixbuf.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-18090?
CVE-2026-18090 is a medium-severity memory corruption vulnerability in Red Hat Enterprise Linux 10, published on 8 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
A flaw was found in gdk-pixbuf. This vulnerability allows a remote attacker to cause a heap out-of-bounds read by providing a specially crafted Apple Icon Image (.icns) file. The uncompress() function, which handles RLE-encoded ICNS icon data, fails to validate the source buffer's boundaries during decompression. This can lead to a denial of service, where the application crashes, or to information disclosure, potentially revealing sensitive data from adjacent memory.
Weakness: CWE-125
Which versions are affected by CVE-2026-18090?
How do I fix CVE-2026-18090?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-18090 being exploited?
There is no known exploitation of CVE-2026-18090 in the wild and no public exploit code.
Sources
Also known as AZL-100929, DEBIAN-CVE-2026-18090, ECHO-20a6-5d48-2092, GHSA-wjgf-rg4p-gj99, UBUNTU-CVE-2026-18090.