CVE-2025-1012High· 7.5▾ TwilightA race during concurrent delazification could have led to a use-after-free. This vulnerability was fixed in Firefox 135, Firefox ESR 115.20, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.1 · 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
0.5%
Last analysed / modified upstream
A race during concurrent delazification could have led to a use-after-free. This vulnerability was fixed in Firefox 135, Firefox ESR 115.20, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.
firefox < 115.20.0firefox < 135.0firefox >= 128.1.0, < 128.7.0thunderbird < 135.0thunderbird >= 128.0.1, < 128.7.0Upgrade past the affected range:
firefox 128.7.0thunderbird 128.7.0Connected by shared product, vendor, weakness, or advisory.
CVE-2025-1010High· 8.8An attacker could have caused a use-after-free via the Custom Highlight API, leading to a potentially exploitable crash
CVE-2025-1009Critical· 9.8An attacker could have caused a use-after-free via crafted XSLT data, leading to a potentially exploitable crash
CVE-2025-1014High· 8.8Certificate length was not properly checked when added to a certificate store
CVE-2025-1016Critical· 9.8Memory safety bugs present in Firefox 134, Thunderbird 134, Firefox ESR 115.19, Firefox ESR 128.6, Thunderbird 115.19, and Thunderbird 128.6
CVE-2025-1017Critical· 9.8Memory safety bugs present in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and Thunderbird 128.6
CVE-2025-1011High· 8.8A bug in WebAssembly code generation could have lead to a crash