CVE-2026-2447

high

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.

References

https://www.mozilla.org/security/advisories/mfsa2026-11/

https://www.mozilla.org/security/advisories/mfsa2026-10/

https://lists.debian.org/debian-lts-announce/2026/02/msg00028.html

https://bugzilla.mozilla.org/show_bug.cgi?id=2014390

Details

Source: Mitre, NVD

Published: 2026-02-16

Updated: 2026-02-22

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 8.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.00017

Detections

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