INFSA-2025:8125: firefox security update

Information about definition

Identificator: INFSA-2025:8125

Type: security

Release date: 2025-07-15 19:43:05 UTC

Information about package

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.

Vulnerabilities description

  • CVE-2025-4918

    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 ESR < 115.23.1, Thunderbird < 128.10.2, and Thunderbird < 138.0.2.

  • CVE-2025-4919

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

Severity level

CVE Score CVSS 2.0 Score CVSS 3.x Score CVSS 4.0
NIST — CVE-2025-4918
 no information 8.8 no information
NIST — CVE-2025-4919
 no information 8.8 no information
Critical, important, moderate, low

Updated packages