CVE-2025-12380: Mozilla Firefox

Critical severity, CVSS 9.8. EPSS: 0.3% chance of exploitation in the next 30 days.

Starting with Firefox 142, it was possible for a compromised child process to trigger a use-after-free in the GPU or browser process using WebGPU-related IPC calls. This may have been usable to escape the child process sandbox. This vulnerability was fixed in Firefox 144.0.2.

Affected products

• Mozilla Firefox: from 142.0, before 144.0.2 (fixed in 144.0.2)

Published 2025-10-28. Last modified 2026-10-08.