CVE-2026-2447

Summary

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.

Impact & exploitability

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

Affected products we track (2)

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Additional information

• NVD record
• https://www.mozilla.org/security/advisories/mfsa2026-10/Advisory
• https://www.mozilla.org/security/advisories/mfsa2026-11/Advisory
• https://bugzilla.mozilla.org/show_bug.cgi?id=2014390
• https://lists.debian.org/debian-lts-announce/2026/02/msg00028.html