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Mozilla Firefox Use-After-Free Vulnerability in WebGPU Internals Allowing Sandbox Escape

Vulnerability

A use-after-free vulnerability has been identified in Mozilla Firefox versions prior to 144.0.2. This issue arises from WebGPU-related inter-process communication (IPC) calls, starting with Firefox 142. A compromised child process could exploit this vulnerability to trigger the use-after-free condition in the GPU or browser process, potentially escaping the child process sandbox.

Impact

Exploitation of this vulnerability could lead to a sandbox escape from a compromised child process.

Remediation

Users can upgrade to Firefox 144.0.2 to address this vulnerability.

Added: Oct 28, 2025, 2:19 PM
Updated: Oct 28, 2025, 2:19 PM

Vulnerability Rating

Custom Algorithm
spread
8.4
impact
10.0
exploitability
4.7
remediation
7.7
relevance
0.8
threat
0.0
urgency
2.9
incentive
0.8

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.