Heap buffer overflow in libvpx. This vulnerability affects Firefox < 147.0.4, Firefox ESR < 140.7.1, Firefox ESR < 115.32.1, Thunderbird < 140.7.2, and Thunderbird < 147.0.2.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact total

Affected Vendors & Products

Vendors Products
Mozilla
  • Firefox
  • Firefox Esr
  • Thunderbird

Configuration 1 [-]

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

No data.

References
Link Providers
https://bugzilla.mozilla.org/show_bug.cgi?id=2014390 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-2447 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-2447 cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-10/ cve-icon cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-11/ cve-icon cve-icon
History

Wed, 18 Feb 2026 21:45:00 +0000

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

Wed, 18 Feb 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 threat_severity

Important

Tue, 17 Feb 2026 15:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-122
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

ssvc

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

Tue, 17 Feb 2026 09:00:00 +0000

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

Mon, 16 Feb 2026 15:45:00 +0000

Type Values Removed Values Added
Description Heap buffer overflow in libvpx. This vulnerability affects Firefox < 147.0.4, Firefox ESR < 140.7.1, and Firefox ESR < 115.32.1. Heap buffer overflow in libvpx. This vulnerability affects Firefox < 147.0.4, Firefox ESR < 140.7.1, Firefox ESR < 115.32.1, Thunderbird < 140.7.2, and Thunderbird < 147.0.2.
References

Mon, 16 Feb 2026 14:30:00 +0000

Type Values Removed Values Added
Description Heap buffer overflow in libvpx. This vulnerability affects Firefox < 147.0.4, Firefox ESR < 140.7.1, and Firefox ESR < 115.32.1.
Title Heap buffer overflow in libvpx
References
cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published: 2026-02-16T14:13:23.559Z

Updated: 2026-02-17T14:53:32.187Z

Reserved: 2026-02-13T09:28:08.874Z

Link: CVE-2026-2447

cve-icon Vulnrichment

Updated: 2026-02-17T14:51:58.752Z

cve-icon NVD

Status : Analyzed

Published: 2026-02-16T15:18:34.740

Modified: 2026-02-18T21:39:10.380

Link: CVE-2026-2447

cve-icon Redhat

Severity : Important

Publid Date: 2026-02-16T14:13:23Z

Links: CVE-2026-2447 - Bugzilla