CVE-2025-4919highCWE-125 CWE-787

CVE-2025-4919: falha de alta gravidade em Mozilla Firefox

Out-of-bounds access when optimizing linear sums

Publicada em 17 mai 2025 · Atualizada em 13 abr 2026

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21Vexday Risk Score

Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.

ssvc Trackcvss 8.8epss 9.1%

An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes. This vulnerability was fixed in Firefox 138.0.4, Firefox ESR 128.10.1, Firefox ESR 115.23.1, Thunderbird 128.10.2, and Thunderbird 138.0.2.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Produtos afetados

Mozilla · Firefox Mozilla · Thunderbird

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No mesmo produto, das mais perigosas para as menos.

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Referências

https://bugzilla.mozilla.org/show_bug.cgi?id=1966614 https://lists.debian.org/debian-lts-announce/2025/05/msg00024.html https://lists.debian.org/debian-lts-announce/2025/05/msg00046.html https://www.mozilla.org/security/advisories/mfsa2025-36/https://www.mozilla.org/security/advisories/mfsa2025-37/https://www.mozilla.org/security/advisories/mfsa2025-38/https://www.mozilla.org/security/advisories/mfsa2025-40/https://www.mozilla.org/security/advisories/mfsa2025-41/