CVE-2025-6424

Description

A use-after-free in FontFaceSet resulted in a potentially exploitable crash. This vulnerability was fixed in Firefox 140, Firefox ESR 115.25, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12.

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Produits concernés

• Mozilla Firefox
• Mozilla Thunderbird

Scores CVSS

Faiblesses (CWE)

• CWE-416

Références

• https://bugzilla.mozilla.org/show_bug.cgi?id=1966423 Permissions Required
• https://www.mozilla.org/security/advisories/mfsa2025-51/ Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2025-52/ Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2025-53/ Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2025-54/
• https://www.mozilla.org/security/advisories/mfsa2025-55/
• https://lists.debian.org/debian-lts-announce/2025/06/msg00029.html
• https://lists.debian.org/debian-lts-announce/2025/07/msg00002.html

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories