Sandbox escape via stale WebGPU shared-memory slices
Published Oct 28, 2025 · Updated Oct 28, 2025
Use-after-free in Firefox 142 through 144.0.1 allows attackers controlling a child process to escape its sandbox through WebGPU IPC. WebGPUParent::RecvMessages moves a mapping into mSharedMemoryMap but leaves a correlated slice usable after buffer destruction unmaps its storage. Exploitation requires control of a sandboxed child process; a forged queue write dereferences the stale slice in the GPU or browser process.
Summary
What happened
Use-after-free in Firefox 142 through 144.0.1 allows attackers controlling a child process to escape its sandbox through WebGPU IPC. WebGPUParent::RecvMessages moves a mapping into mSharedMemoryMap but leaves a correlated slice usable after buffer destruction unmaps its storage. Exploitation requires control of a sandboxed child process; a forged queue write dereferences the stale slice in the GPU or browser process.
The record
- CVE
- CVE-2025-12380
- Published
- Oct 28, 2025
- Updated
- Oct 28, 2025
- Vendor
- Mozilla
- Product
- Firefox
- Classifications
- CWE-416, T1068
- Attack vector
- local
- Privileges
- Unavailable
Timeline
How it unfolded
- Oct 28, 2025CVE publishedPublication date reported by the CVE source.
- Oct 28, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=unspecified <144.0.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- Mozilla Bugzilla shared-memory UAF reproductionproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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