CVE-2025-12380 Use-after-free in WebGPU internals triggered from a compromised child process

What is CVE-2025-12380?

CVE-2025-12380 is a critical use after free vulnerability in Mozilla Firefox, published on 28 Oct 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-416

Which versions are affected by CVE-2025-12380?

It affects 1 product.

Products include Mozilla Firefox.

How do I fix CVE-2025-12380?

Upgrade to a fixed version.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2025-12380 being exploited?

There is no known exploitation of CVE-2025-12380 in the wild and no public exploit code.

Other vulnerabilities in Mozilla Firefox

• CVE-2019-11708 Mozilla Firefox and Thunderbird Sandbox Escape Exploited Critical 10.0
• CVE-2010-3765 Mozilla Multiple Products Remote Code Execution Exploited Critical 9.8
• CVE-2022-26486 Mozilla Firefox Use-After-Free Exploited Critical 9.6
• CVE-2022-26485 Mozilla Firefox Use-After-Free Exploited High 8.8
• CVE-2019-11707 Mozilla Firefox and Thunderbird Type Confusion Exploited High 8.8

All Mozilla Firefox vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-mmmm-6m78-44q2, openSUSE-SU-2025:15686-1.