CVE-2025-6424Critical· 9.8▾ MidnightA use-after-free in FontFaceSet resulted in a potentially exploitable crash. This vulnerability was fixed in Firefox 140, Firefox ESR 115.25, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12.
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 53.9 · likelihood 1.6 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 30.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
4.4%
Last analysed / modified upstream
4.4% → 8.0%
A use-after-free in FontFaceSet resulted in a potentially exploitable crash. This vulnerability was fixed in Firefox 140, Firefox ESR 115.25, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12.
firefox < 115.25.0firefox < 140.0firefox >= 116.0, < 128.12.0Upgrade past the affected range:
firefox 128.12.0Connected by shared product, vendor, weakness, or advisory.
CVE-2022-26486Critical· 9.6An unexpected message in the WebGPU IPC framework could lead to a use-after-free and exploitable sandbox escape
CVE-2022-26485High· 8.8Removing an XSLT parameter during processing could have lead to an exploitable use-after-free
CVE-2024-9680Critical· 9.8An attacker was able to achieve code execution in the content process by exploiting a use-after-free in Animation timelines
CVE-2025-3028Medium· 6.5JavaScript code running while transforming a document with the XSLTProcessor could lead to a use-after-free
CVE-2025-1931High· 7.5It was possible to cause a use-after-free in the content process side of a WebTransport connection, leading to a potentially exploitable crash
CVE-2025-1930High· 8.8On Windows, a compromised content process could use bad StreamData sent over AudioIPC to trigger a use-after-free in the Browser process