CVE-2026-100768 describes a use-after-free vulnerability in the Graphics: WebGPU component of Firefox. Use-after-free vulnerabilities occur when a program continues to use a pointer after the memory it points to has been freed, potentially leading to memory corruption and security issues. This specific vulnerability was reported by Yaqoub Aldurayhim and is classified with high impact. Mozilla fixed this vulnerability in Firefox 157 as part of a broader security update addressing multiple memory safety issues.

The vulnerability has a high impact rating according to Mozilla's advisory. Use-after-free vulnerabilities can lead to arbitrary code execution, privilege escalation, or application crashes. However, no known exploits in the wild have been reported for this specific CVE. The fix in Firefox 157 mitigates the risk by correcting the memory management flaw in the WebGPU graphics component.

Mozilla has released an official fix for this vulnerability in Firefox version 157. Users and administrators should update to Firefox 157 or later to remediate this issue. Since this is a client-side application vulnerability, applying the update is the primary and recommended mitigation. No additional vendor-recommended mitigations are necessary beyond applying the official patch.