Uninitialized memory in the JavaScript Engine component. This vulnerability was fixed in Firefox 142, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4277-1 firefox-esr security update
Debian DLA Debian DLA DLA-4279-1 thunderbird security update
Debian DSA Debian DSA DSA-5980-1 firefox-esr security update
Debian DSA Debian DSA DSA-5984-1 thunderbird security update
EUVD EUVD EUVD-2025-25244 Uninitialized memory in the JavaScript Engine component. This vulnerability affects Firefox < 142, Firefox ESR < 128.14, Firefox ESR < 140.2, Thunderbird < 142, Thunderbird < 128.14, and Thunderbird < 140.2.
Ubuntu USN Ubuntu USN USN-7991-1 Thunderbird vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Mon, 13 Apr 2026 15:00:00 +0000

Type Values Removed Values Added
Description Uninitialized memory in the JavaScript Engine component. This vulnerability affects Firefox < 142, Firefox ESR < 128.14, Firefox ESR < 140.2, Thunderbird < 142, Thunderbird < 128.14, and Thunderbird < 140.2. Uninitialized memory in the JavaScript Engine component. This vulnerability was fixed in Firefox 142, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.

Mon, 03 Nov 2025 19:30:00 +0000


Thu, 30 Oct 2025 16:00:00 +0000

Type Values Removed Values Added
Title thunderbird: firefox: Uninitialized memory in the JavaScript Engine component Uninitialized memory in the JavaScript Engine component

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

Type Values Removed Values Added
Title thunderbird: firefox: Uninitialized memory in the JavaScript Engine component
Weaknesses CWE-665
References
Metrics threat_severity

None

threat_severity

Moderate


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

Type Values Removed Values Added
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 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

Wed, 20 Aug 2025 16:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-457
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N'}

ssvc

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


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

Type Values Removed Values Added
Description Uninitialized memory in the JavaScript Engine component. This vulnerability affects Firefox < 142, Firefox ESR < 128.14, Firefox ESR < 140.2, Thunderbird < 142, Thunderbird < 128.14, and Thunderbird < 140.2.
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-04-13T14:25:51.187Z

Reserved: 2025-08-19T15:55:41.889Z

Link: CVE-2025-9181

cve-icon Vulnrichment

Updated: 2025-11-03T18:14:14.144Z

cve-icon NVD

Status : Modified

Published: 2025-08-19T21:15:30.520

Modified: 2026-04-13T15:17:13.777

Link: CVE-2025-9181

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-08-19T20:33:55Z

Links: CVE-2025-9181 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2025-08-21T12:31:47Z

Weaknesses