Critical severity · published Oct 28, 2025
CVE-2025-12380
Use-after-free in WebGPU internals triggered from a compromised child process
9.8
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 27% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
Firefox · Mozilla
142.0 before 144.0.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-12380
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-12380
Permissions Required
https://bugzilla.mozilla.org/show_bug.cgi?id=1993113
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-86/
More from Firefox
10.0
CVE-2019-11708
Mozilla Firefox and Thunderbird Sandbox Escape Vulnerability
9.8
CVE-2024-9680
Mozilla Firefox Use-After-Free Vulnerability
9.8
CVE-2010-3765
Mozilla Multiple Products Remote Code Execution Vulnerability
9.6
CVE-2022-26486
Mozilla Firefox Use-After-Free Vulnerability
8.8
CVE-2023-5217
Google Chromium libvpx Heap Buffer Overflow Vulnerability