CVE-2025-6424

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-6424
A use-after-free in FontFaceSet resulted in a potentially exploitable crash. This vulnerability affects Firefox < 140, Firefox ESR < 115.25, Firefox ESR < 128.12, Thunderbird < 140, and Thunderbird < 128.12.

9.8 /10

CVSS v3 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
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/
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
History

02 Jul 2025, 21:15

Type Values Removed Values Added
References
  • () https://www.mozilla.org/security/advisories/mfsa2025-54/ -
  • () https://www.mozilla.org/security/advisories/mfsa2025-55/ -
Summary (en) A use-after-free in FontFaceSet resulted in a potentially exploitable crash. This vulnerability affects Firefox < 140, Firefox ESR < 115.25, and Firefox ESR < 128.12. (en) A use-after-free in FontFaceSet resulted in a potentially exploitable crash. This vulnerability affects Firefox < 140, Firefox ESR < 115.25, Firefox ESR < 128.12, Thunderbird < 140, and Thunderbird < 128.12.

02 Jul 2025, 18:11

Type Values Removed Values Added
First Time Mozilla firefox
Mozilla
CPE cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
References () https://bugzilla.mozilla.org/show_bug.cgi?id=1966423 - () https://bugzilla.mozilla.org/show_bug.cgi?id=1966423 - Permissions Required
References () https://www.mozilla.org/security/advisories/mfsa2025-51/ - () https://www.mozilla.org/security/advisories/mfsa2025-51/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-52/ - () https://www.mozilla.org/security/advisories/mfsa2025-52/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-53/ - () https://www.mozilla.org/security/advisories/mfsa2025-53/ - Vendor Advisory

25 Jun 2025, 13:15

Type Values Removed Values Added
Summary
  • (es) Use-after-free en FontFaceSet provocó un bloqueo potencialmente explotable. Esta vulnerabilidad afecta a Firefox &lt; 140, Firefox ESR &lt; 115.25 y Firefox ESR &lt; 128.12.
CWE CWE-416
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 9.8

24 Jun 2025, 13:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-06-24 13:15

Updated : 2025-07-02 21:15

NVD link : CVE-2025-6424

Mitre link : CVE-2025-6424

CVE.ORG link : CVE-2025-6424

JSON object : View

Products Affected

mozilla

  • firefox
CWE
CWE-416

Use After Free