CVE-2026-90948 Gimp: gimp: heap-based buffer overflow in ico loader via integer overflow in embedded png dimensions
A remote attacker can execute arbitrary code or cause a crash by tricking a user into opening a malicious ICO file with an embedded PNG.
- 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-2026-90948?
CVE-2026-90948 is a high-severity vulnerability in Red Hat Enterprise Linux 6, published on 14 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 GIMP's ICO file loader. When processing an ICO file containing an embedded PNG image, an integer overflow can occur during the calculation of the required buffer size. This leads to an undersized buffer being allocated, causing a heap-based buffer overflow when the decoded pixel data is written. A remote attacker could exploit this by crafting a malicious ICO file, which, when opened, could lead to arbitrary code execution or a crash.
Weakness: CWE-787
Which versions are affected by CVE-2026-90948?
How do I fix CVE-2026-90948?
Apply the vendor's patch.
Is CVE-2026-90948 being exploited?
There is no known exploitation of CVE-2026-90948 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-90948, GHSA-4gcm-x544-rhh4, UBUNTU-CVE-2026-90948.