CVE-2026-66757 GNOME CVE debrief

Who should care

Users of GIMP, especially those processing untrusted SGI images, should be aware of this vulnerability and take steps to mitigate it. This includes reviewing and applying patches from GIMP vendors, restricting access to untrusted SGI images, and monitoring for similar vulnerabilities in image processing plugins. IT teams and security professionals responsible for managing GIMP installations should prioritize this issue and ensure that their systems are updated and protected.

Technical summary

The file-sgi plugin in GIMP is vulnerable to an integer overflow when processing RLE-compressed SGI images. If a crafted file sets image header dimensions (ysize and zsize) to their maximum value (65535), the multiplication overflows the 32-bit int boundary before being passed to calloc, resulting in undefined behavior and a denial of service. This issue affects users of GIMP who process untrusted SGI images, particularly those in environments where image processing is common.

Defensive priority

Medium priority due to potential for denial of service

Recommended defensive actions

• Review and apply patches from GIMP vendors
• Restrict access to untrusted SGI images
• Monitor for similar vulnerabilities in image processing plugins
• Perform a thorough review of system logs for abnormal plugin behavior
• Ensure that GIMP is updated to the latest version
• Conduct an asset inventory to identify systems that may be exposed
• Implement compensating controls for exposed systems while remediation is scheduled

Evidence notes

Evidence from official CVE and NVD sources indicate a potential integer overflow issue in GIMP's file-sgi plugin. Limited details are available on affected products and versions. To verify, defenders should review official advisories and assess their exposure to untrusted SGI images. Additional verification tasks may include reviewing system logs for abnormal plugin behavior and ensuring that GIMP is updated to the latest version.

Official resources