CVE-2026-2447

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.
References
Link Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=2014390 Issue Tracking Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-10/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-11/ Vendor Advisory
https://lists.debian.org/debian-lts-announce/2026/02/msg00028.html
https://access.redhat.com/errata/RHSA-2026:16174
https://access.redhat.com/errata/RHSA-2026:3338
https://access.redhat.com/errata/RHSA-2026:3339
https://access.redhat.com/errata/RHSA-2026:3361
https://access.redhat.com/errata/RHSA-2026:3491
https://access.redhat.com/errata/RHSA-2026:3492
https://access.redhat.com/errata/RHSA-2026:3493
https://access.redhat.com/errata/RHSA-2026:3494
https://access.redhat.com/errata/RHSA-2026:3495
https://access.redhat.com/errata/RHSA-2026:3496
https://access.redhat.com/errata/RHSA-2026:3497
https://access.redhat.com/errata/RHSA-2026:3515
https://access.redhat.com/errata/RHSA-2026:3516
https://access.redhat.com/errata/RHSA-2026:3517
https://access.redhat.com/errata/RHSA-2026:3967
https://access.redhat.com/errata/RHSA-2026:3976
https://access.redhat.com/errata/RHSA-2026:3978
https://access.redhat.com/errata/RHSA-2026:3979
https://access.redhat.com/errata/RHSA-2026:3980
https://access.redhat.com/errata/RHSA-2026:3981
https://access.redhat.com/errata/RHSA-2026:3982
https://access.redhat.com/errata/RHSA-2026:3983
https://access.redhat.com/errata/RHSA-2026:3984
https://access.redhat.com/errata/RHSA-2026:4022
https://access.redhat.com/errata/RHSA-2026:4152
https://access.redhat.com/errata/RHSA-2026:4260
https://access.redhat.com/errata/RHSA-2026:4432
https://access.redhat.com/errata/RHSA-2026:4447
https://access.redhat.com/errata/RHSA-2026:4629
https://access.redhat.com/errata/RHSA-2026:5227
https://access.redhat.com/errata/RHSA-2026:5228
https://access.redhat.com/errata/RHSA-2026:5229
https://access.redhat.com/errata/RHSA-2026:5230
https://access.redhat.com/errata/RHSA-2026:5231
https://access.redhat.com/errata/RHSA-2026:5319
https://access.redhat.com/errata/RHSA-2026:5320
https://access.redhat.com/errata/RHSA-2026:5323
https://access.redhat.com/errata/RHSA-2026:5324
https://access.redhat.com/errata/RHSA-2026:5326
https://access.redhat.com/errata/RHSA-2026:8746
https://access.redhat.com/errata/RHSA-2026:8747
https://access.redhat.com/errata/RHSA-2026:8748
https://access.redhat.com/security/cve/CVE-2026-2447
https://bugzilla.redhat.com/show_bug.cgi?id=2440219
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2447.json
Configurations

Configuration 1 (hide)

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:*:*:*:*:*:*:*:*

History

30 Jun 2026, 03:18

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:16174 -
  • () https://access.redhat.com/errata/RHSA-2026:3338 -
  • () https://access.redhat.com/errata/RHSA-2026:3339 -
  • () https://access.redhat.com/errata/RHSA-2026:3361 -
  • () https://access.redhat.com/errata/RHSA-2026:3491 -
  • () https://access.redhat.com/errata/RHSA-2026:3492 -
  • () https://access.redhat.com/errata/RHSA-2026:3493 -
  • () https://access.redhat.com/errata/RHSA-2026:3494 -
  • () https://access.redhat.com/errata/RHSA-2026:3495 -
  • () https://access.redhat.com/errata/RHSA-2026:3496 -
  • () https://access.redhat.com/errata/RHSA-2026:3497 -
  • () https://access.redhat.com/errata/RHSA-2026:3515 -
  • () https://access.redhat.com/errata/RHSA-2026:3516 -
  • () https://access.redhat.com/errata/RHSA-2026:3517 -
  • () https://access.redhat.com/errata/RHSA-2026:3967 -
  • () https://access.redhat.com/errata/RHSA-2026:3976 -
  • () https://access.redhat.com/errata/RHSA-2026:3978 -
  • () https://access.redhat.com/errata/RHSA-2026:3979 -
  • () https://access.redhat.com/errata/RHSA-2026:3980 -
  • () https://access.redhat.com/errata/RHSA-2026:3981 -
  • () https://access.redhat.com/errata/RHSA-2026:3982 -
  • () https://access.redhat.com/errata/RHSA-2026:3983 -
  • () https://access.redhat.com/errata/RHSA-2026:3984 -
  • () https://access.redhat.com/errata/RHSA-2026:4022 -
  • () https://access.redhat.com/errata/RHSA-2026:4152 -
  • () https://access.redhat.com/errata/RHSA-2026:4260 -
  • () https://access.redhat.com/errata/RHSA-2026:4432 -
  • () https://access.redhat.com/errata/RHSA-2026:4447 -
  • () https://access.redhat.com/errata/RHSA-2026:4629 -
  • () https://access.redhat.com/errata/RHSA-2026:5227 -
  • () https://access.redhat.com/errata/RHSA-2026:5228 -
  • () https://access.redhat.com/errata/RHSA-2026:5229 -
  • () https://access.redhat.com/errata/RHSA-2026:5230 -
  • () https://access.redhat.com/errata/RHSA-2026:5231 -
  • () https://access.redhat.com/errata/RHSA-2026:5319 -
  • () https://access.redhat.com/errata/RHSA-2026:5320 -
  • () https://access.redhat.com/errata/RHSA-2026:5323 -
  • () https://access.redhat.com/errata/RHSA-2026:5324 -
  • () https://access.redhat.com/errata/RHSA-2026:5326 -
  • () https://access.redhat.com/errata/RHSA-2026:8746 -
  • () https://access.redhat.com/errata/RHSA-2026:8747 -
  • () https://access.redhat.com/errata/RHSA-2026:8748 -
  • () https://access.redhat.com/security/cve/CVE-2026-2447 -
  • () https://bugzilla.redhat.com/show_bug.cgi?id=2440219 -
  • () https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2447.json -

13 Apr 2026, 15:17

Type Values Removed Values Added
Summary (en) 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. (en) 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.

22 Feb 2026, 21:16

Type Values Removed Values Added
References
  • () https://lists.debian.org/debian-lts-announce/2026/02/msg00028.html -

18 Feb 2026, 21:39

Type Values Removed Values Added
CPE cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
First Time Mozilla
Mozilla firefox
Mozilla thunderbird
References () https://bugzilla.mozilla.org/show_bug.cgi?id=2014390 - () https://bugzilla.mozilla.org/show_bug.cgi?id=2014390 - Issue Tracking, Permissions Required
References () https://www.mozilla.org/security/advisories/mfsa2026-10/ - () https://www.mozilla.org/security/advisories/mfsa2026-10/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2026-11/ - () https://www.mozilla.org/security/advisories/mfsa2026-11/ - Vendor Advisory

18 Feb 2026, 17:52

Type Values Removed Values Added
Summary
  • (es) Desbordamiento de búfer en el heap en libvpx. Esta vulnerabilidad afecta a Firefox &lt; 147.0.4, Firefox ESR &lt; 140.7.1, Firefox ESR &lt; 115.32.1, Thunderbird &lt; 140.7.2, y Thunderbird &lt; 147.0.2.

17 Feb 2026, 15:16

Type Values Removed Values Added
CWE CWE-122
CVSS v2 : unknown
v3 : unknown
v2 : unknown
v3 : 8.8

16 Feb 2026, 16:19

Type Values Removed Values Added
References
  • () https://www.mozilla.org/security/advisories/mfsa2026-11/ -
Summary (en) Heap buffer overflow in libvpx. This vulnerability affects Firefox < 147.0.4, Firefox ESR < 140.7.1, and Firefox ESR < 115.32.1. (en) 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.

16 Feb 2026, 15:18

Type Values Removed Values Added
New CVE

Information

Published : 2026-02-16 15:18

Updated : 2026-07-15 02:19


NVD link : CVE-2026-2447

Mitre link : CVE-2026-2447

CVE.ORG link : CVE-2026-2447


JSON object : View

Products Affected

mozilla

  • firefox
  • thunderbird
CWE
CWE-122

Heap-based Buffer Overflow