Bug 2533136

Summary: CVE-2026-90947 gimp: gimp: out-of-bounds write in lighting effects plugin via crafted preset file [fedora-all]
Product: [Fedora] Fedora Reporter: Vladimir Vasilev <vvasilev>
Component: gimpAssignee: Nils Philippsen <nphilipp>
Status: NEW --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: high    
Version: rawhideCC: jridky, nphilipp, phracek, zdohnal
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---Flags: fedora-admin-xmlrpc: mirror+
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["b7431082-4836-4277-b0b2-bd24faaab9e0"]}
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On:    
Bug Blocks: 2533005    

Description Vladimir Vasilev 2026-09-14 14:52:46 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

A flaw was found in GIMP's Lighting Effects filter. When loading a lighting preset file, lighting-ui.c reads the number of light sources from the file using fscanf() without validating the return value or bounding the parsed count against the fixed-size array of light sources (NUM_LIGHTS, 6 entries). A preset file specifying more than 6 light sources causes writes past the end of the lightsource array, corrupting memory. This issue could be triggered by convincing a user to open a specially crafted lighting preset file in GIMP, potentially leading to a crash or arbitrary code execution in the context of the user running GIMP.