CVE-2026-90948

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.

This vulnerability is rated as Important because, although exploitation requires user interaction to open an untrusted image file, a successful attack can result in arbitrary code execution with the permissions of the user running GIMP. In typical Red Hat Enterprise Linux server environments, GIMP is not installed or enabled by default, confining the risk primarily to workstation and desktop systems where users interactively open external files. The flaw cannot be exploited directly over the network without user intervention, reducing the likelihood of automated or widespread compromise.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.