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CVE-2025-4919

Out-of-bounds access when optimizing linear sums

CVSS 8.8 HIGHEPSS 5.8%CWE-125CWE-787
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
Productos afectados
Mozilla · FirefoxMozilla · Thunderbird

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Referencias
https://bugzilla.mozilla.org/show_bug.cgi?id=1966614https://lists.debian.org/debian-lts-announce/2025/05/msg00024.htmlhttps://lists.debian.org/debian-lts-announce/2025/05/msg00046.htmlhttps://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/