Race condition, use-after-free in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Mozilla
  • Firefox
  • Thunderbird

Configuration 1 [-]

OR cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*

No data.

References
Link Providers
https://bugzilla.mozilla.org/show_bug.cgi?id=2060357 cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-74973 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-74973 cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-74/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-75/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-76/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-76/#CVE-2026-74973 cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-77/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-78/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-79/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-79/#CVE-2026-74973 cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-80/ cve-icon cve-icon
History

Wed, 19 Aug 2026 17:15:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla thunderbird
CPEs cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
Vendors & Products Mozilla thunderbird

Wed, 19 Aug 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-825
References
Metrics threat_severity

None

 threat_severity

Moderate

Tue, 18 Aug 2026 19:00:00 +0000

Type Values Removed Values Added
Description Race condition, use-after-free in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, and Firefox ESR 153.1. Race condition, use-after-free in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
References

Tue, 18 Aug 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 4.2, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N'}

ssvc

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

Tue, 18 Aug 2026 14:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-362
CWE-416

Tue, 18 Aug 2026 14:00:00 +0000

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

Tue, 18 Aug 2026 12:45:00 +0000

Type Values Removed Values Added
Description Race condition, use-after-free in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, and Firefox ESR 153.1.
Title Race condition, use-after-free in the Graphics component
References
cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published: 2026-08-18T12:23:33.845Z

Updated: 2026-08-18T18:55:20.315Z

Reserved: 2026-08-17T11:58:50.482Z

Link: CVE-2026-74973

cve-icon Vulnrichment

Updated: 2026-08-18T15:37:27.931Z

cve-icon NVD

Status : Analyzed

Published: 2026-08-18T13:17:34.927

Modified: 2026-08-19T17:08:35.160

Link: CVE-2026-74973

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-08-18T12:23:33Z

Links: CVE-2026-74973 - Bugzilla