CVE-2026-12293
Critical · CVSS 9.8Firefox / Thunderbird (WebGPU) — Use-after-free in WebGPU graphics component (CWE-416 / CWE-825)
- CVSS
- 9.8
- nvd
- EPSS
- —
- KEV
- No
- Class
- other
- CWE-416, CWE-416, CWE-825
Description
Use-after-free in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 152 and Thunderbird 152.
Search profile — drives PoC discovery
Symbols WebGPUGraphics: WebGPUwgpuGPUDeviceGPUBufferGPUCommandEncoderGPURenderPipelineGPUQueuebug 2039568mfsa2026-57mfsa2026-60
Keywords CVE-2026-12293Firefox WebGPU use-after-freeThunderbird WebGPU UAFFirefox 152 WebGPU exploitmfsa2026-57 PoCmfsa2026-60 PoCbugzilla 2039568 exploitWebGPU UAF FirefoxCWE-416 Firefox WebGPUCWE-825 Firefox WebGPU
Versions: Firefox < 152, Thunderbird < 152
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2039568
- https://www.mozilla.org/security/advisories/mfsa2026-57/
- https://www.mozilla.org/security/advisories/mfsa2026-60/
- https://access.redhat.com/security/cve/CVE-2026-12293
- https://bugzilla.redhat.com/show_bug.cgi?id=2489216
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12293.json
Status: enriched · ingested 2026-06-30T06:00:22.000Z · profiled 2026-06-30T18:30:14.000Z