CVE-2025-13021 is a critical vulnerability involving incorrect boundary conditions in the Graphics: WebGPU component of Firefox. This flaw affects Firefox versions prior to 145 and was addressed in Firefox 145. The vulnerability is related to memory safety issues that could lead to high-impact consequences including potential arbitrary code execution. The issue was reported by Atte Kettunen and is part of a set of memory safety bugs fixed in Firefox 145 and Thunderbird 145.