CVE-2025-0241High· 7.7▾ TwilightWhen segmenting specially crafted text, segmentation would corrupt memory leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.4 · 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
0.7%
Last analysed / modified upstream
When segmenting specially crafted text, segmentation would corrupt memory leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.
firefox < 128.6.0firefox < 134.0thunderbird < 128.6.0thunderbird >= 129.0, < 134.0Upgrade past the affected range:
firefox 134.0thunderbird 134.0Connected by shared product, vendor, weakness, or advisory.
CVE-2025-0242Medium· 6.5Memory safety bugs present in Firefox 133, Thunderbird 133, Firefox ESR 115.18, Firefox ESR 128.5, Thunderbird 115.18, and Thunderbird 128.5
CVE-2025-0243Medium· 5.1Memory safety bugs present in Firefox 133, Thunderbird 133, Firefox ESR 128.5, and Thunderbird 128.5
CVE-2025-0239Medium· 4.0When using Alt-Svc, ALPN did not properly validate certificates when the original server is redirecting to an insecure site
CVE-2025-0240Medium· 4.0Parsing a JavaScript module as JSON could, under some circumstances, cause cross-compartment access, which may result in a use-after-free
CVE-2025-0237Medium· 5.4The WebChannel API, which is used to transport various information across processes, did not check the sending principal but rather accepted the principal being sent
CVE-2025-0238Medium· 5.3Assuming a controlled failed memory allocation, an attacker could have caused a use-after-free, leading to a potentially exploitable crash