Memory safety bugs present in Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 142, Firefox ESR < 140.2, Thunderbird < 142, and Thunderbird < 140.2.
History

Fri, 22 Aug 2025 00:15:00 +0000

Type Values Removed Values Added
Title thunderbird: firefox: Memory safety bugs fixed in Firefox ESR 140.2, Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142
References
Metrics threat_severity

None

threat_severity

Important


Thu, 21 Aug 2025 18:45:00 +0000

Type Values Removed Values Added
Weaknesses NVD-CWE-noinfo
CPEs cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*

Thu, 21 Aug 2025 14:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-119
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 21 Aug 2025 12:45:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Mozilla firefox Esr
Mozilla thunderbird
Vendors & Products Mozilla
Mozilla firefox
Mozilla firefox Esr
Mozilla thunderbird

Tue, 19 Aug 2025 20:45:00 +0000

Type Values Removed Values Added
Description Memory safety bugs present in Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 142, Firefox ESR < 140.2, Thunderbird < 142, and Thunderbird < 140.2.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published: 2025-08-19T20:33:58.037Z

Updated: 2025-08-21T13:45:24.222Z

Reserved: 2025-08-19T15:56:07.296Z

Link: CVE-2025-9184

cve-icon Vulnrichment

Updated: 2025-08-21T13:45:21.163Z

cve-icon NVD

Status : Analyzed

Published: 2025-08-19T21:15:30.903

Modified: 2025-08-21T18:37:05.943

Link: CVE-2025-9184

cve-icon Redhat

Severity : Important

Publid Date: 2025-08-19T20:33:58Z

Links: CVE-2025-9184 - Bugzilla