CVE-2025-4918criticalCWE-125 CWE-787

CVE-2025-4918: fallo crítico en Mozilla Firefox

Out-of-bounds access when resolving Promise objects

Publicada el 17 may 2025 · Actualizada el 13 abr 2026

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Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.

28Vexday Risk Score

Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.

ssvc Trackcvss 9.8epss 9.5%

An attacker was able to perform an out-of-bounds read or write on a JavaScript `Promise` object. 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:N/S:U/C:H/I:H/A:H

Productos afectados

Mozilla · Firefox Mozilla · Thunderbird

CVEs relacionadas — Mozilla Firefox

En el mismo producto, de las más peligrosas a las menos.

CVE-2016-9079HIGHCVE-2016-9079EPSS 87.4%KEV CVE-2019-11708CRITICALCVE-2019-11708EPSS 55.9%KEV CVE-2019-17026HIGHCVE-2019-17026EPSS 46.3%KEV CVE-2019-11707HIGHCVE-2019-11707EPSS 38.0%KEV CVE-2024-9680CRITICALCVE-2024-9680EPSS 23.2%KEV CVE-2022-26485HIGHCVE-2022-26485EPSS 14.3%KEV

Referencias

https://bugzilla.mozilla.org/show_bug.cgi?id=1966612 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/https://www.vicarius.io/vsociety/posts/cve-2025-4918-detect-firefox-out-of-bounds-write https://www.vicarius.io/vsociety/posts/cve-2025-4918-mitigate-firefox-out-of-bounds-write