firefox: thunderbird: Out-of-bounds access when optimizing linear sums

A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: An attacker could perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes...

OESA-2025-1548 firefox security update

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance and portability. Security Fixes: An attacker was able to perform an out-of-bounds read or write on a JavaScript Promise object. This vulnerability affects Firefox 138.0.4, Firefox ESR 128.10.1, Firefox E...

CVE-2025-4919

CVE-2025-4919 describes an out-of-bounds read/write in JavaScript objects caused by confusing array index sizes, affecting Firefox including aliases (Firefox < 138.0.4, ESR < 128.10.1, ESR < 115.23.1) and Thunderbird (Thunderbird < 128.10.2; Thunderbird