CVE-2026-2447

Heap buffer overflow in libvpx

Published Feb 16, 2026 CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Description
Heap buffer overflow in libvpx. This vulnerability was fixed in Firefox 147.0.4, Firefox ESR 140.7.1, Firefox ESR 115.32.1, Thunderbird 140.7.2, and Thunderbird 147.0.2.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-4489-1 libvpx security update
Debian DSA Debian DSA DSA-6143-1 libvpx security update
Ubuntu USN Ubuntu USN USN-8053-1 libvpx vulnerability
References
Link Providers
https://access.redhat.com/errata/RHSA-2026:16174 cve-icon
https://access.redhat.com/errata/RHSA-2026:3338 cve-icon
https://access.redhat.com/errata/RHSA-2026:3339 cve-icon
https://access.redhat.com/errata/RHSA-2026:3361 cve-icon
https://access.redhat.com/errata/RHSA-2026:3491 cve-icon
https://access.redhat.com/errata/RHSA-2026:3492 cve-icon
https://access.redhat.com/errata/RHSA-2026:3493 cve-icon
https://access.redhat.com/errata/RHSA-2026:3494 cve-icon
https://access.redhat.com/errata/RHSA-2026:3495 cve-icon
https://access.redhat.com/errata/RHSA-2026:3496 cve-icon
https://access.redhat.com/errata/RHSA-2026:3497 cve-icon
https://access.redhat.com/errata/RHSA-2026:3515 cve-icon
https://access.redhat.com/errata/RHSA-2026:3516 cve-icon
https://access.redhat.com/errata/RHSA-2026:3517 cve-icon
https://access.redhat.com/errata/RHSA-2026:3967 cve-icon
https://access.redhat.com/errata/RHSA-2026:3976 cve-icon
https://access.redhat.com/errata/RHSA-2026:3978 cve-icon
https://access.redhat.com/errata/RHSA-2026:3979 cve-icon
https://access.redhat.com/errata/RHSA-2026:3980 cve-icon
https://access.redhat.com/errata/RHSA-2026:3981 cve-icon
https://access.redhat.com/errata/RHSA-2026:3982 cve-icon
https://access.redhat.com/errata/RHSA-2026:3983 cve-icon
https://access.redhat.com/errata/RHSA-2026:3984 cve-icon
https://access.redhat.com/errata/RHSA-2026:4022 cve-icon
https://access.redhat.com/errata/RHSA-2026:4152 cve-icon
https://access.redhat.com/errata/RHSA-2026:4260 cve-icon
https://access.redhat.com/errata/RHSA-2026:4432 cve-icon
https://access.redhat.com/errata/RHSA-2026:4447 cve-icon
https://access.redhat.com/errata/RHSA-2026:4629 cve-icon
https://access.redhat.com/errata/RHSA-2026:5227 cve-icon
https://access.redhat.com/errata/RHSA-2026:5228 cve-icon
https://access.redhat.com/errata/RHSA-2026:5229 cve-icon
https://access.redhat.com/errata/RHSA-2026:5230 cve-icon
https://access.redhat.com/errata/RHSA-2026:5231 cve-icon
https://access.redhat.com/errata/RHSA-2026:5319 cve-icon
https://access.redhat.com/errata/RHSA-2026:5320 cve-icon
https://access.redhat.com/errata/RHSA-2026:5323 cve-icon
https://access.redhat.com/errata/RHSA-2026:5324 cve-icon
https://access.redhat.com/errata/RHSA-2026:5326 cve-icon
https://access.redhat.com/errata/RHSA-2026:8746 cve-icon
https://access.redhat.com/errata/RHSA-2026:8747 cve-icon
https://access.redhat.com/errata/RHSA-2026:8748 cve-icon
https://access.redhat.com/security/cve/CVE-2026-2447 cve-icon
https://bugzilla.mozilla.org/show_bug.cgi?id=2014390 cve-icon cve-icon cve-icon
https://bugzilla.redhat.com/show_bug.cgi?id=2440219 cve-icon
https://lists.debian.org/debian-lts-announce/2026/02/msg00028.html cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-2447 cve-icon
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2447.json 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
Type Values Removed Values Added
Description 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. Heap buffer overflow in libvpx. This vulnerability was fixed in Firefox 147.0.4, Firefox ESR 140.7.1, Firefox ESR 115.32.1, Thunderbird 140.7.2, and Thunderbird 147.0.2.
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
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'}

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

Sources

Status
PUBLISHED
Assigner
mozilla
Published
Updated
Jul 15, 2026, 2:49 AM
Reserved
Feb 13, 2026, 9:28 AM
Status
Modified
Published
Feb 16, 2026, 3:18 PM
Modified
Jul 15, 2026, 2:19 AM
Severity
Important
Public date
Feb 16, 2026, 2:13 PM