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Fencer Vulns
high 8.8

CVE-2026-2447 json

Heap buffer overflow in libvpx

published 2026-02-16 8 mo ago modified 2026-07-15 3 mo ago also EUVD-2026-6081

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 53%
public exploits
0
none known

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.

Patch / fix

  • Red Hat Red Hat Enterprise Linux 10 0:1.14.1-6.el10_1, 0:140.8.0-2.el10_1
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:1.14.1-3.el10_0.1, 0:140.8.0-2.el10_0
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:1.3.0-8.el7_9.3, 0:140.8.0-2.el7_9
  • Red Hat Red Hat Enterprise Linux 8 0:1.7.0-13.el8_10, 0:140.8.0-1.el8_10, 0:140.8.0-2.el8_10
  • Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support 0:1.7.0-8.el8_2.2, 0:140.8.0-1.el8_2, 0:140.8.0-2.el8_2
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:1.7.0-10.el8_4.2, 0:140.8.0-2.el8_4
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:1.7.0-10.el8_4.2, 0:140.8.0-2.el8_4
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:1.7.0-10.el8_6.2, 0:140.8.0-1.el8_6, 0:140.8.0-2.el8_6
  • Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service 0:1.7.0-10.el8_6.2, 0:140.8.0-1.el8_6, 0:140.8.0-2.el8_6
  • Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions 0:1.7.0-10.el8_6.2, 0:140.8.0-1.el8_6, 0:140.8.0-2.el8_6
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:1.7.0-10.el8_8.2, 0:140.8.0-1.el8_8, 0:140.8.0-2.el8_8
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:1.7.0-10.el8_8.2, 0:140.8.0-1.el8_8, 0:140.8.0-2.el8_8
  • Red Hat Red Hat Enterprise Linux 9 0:1.9.0-10.el9_7, 0:140.8.0-1.el9_7, 0:140.8.0-2.el9_7
  • Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions 0:1.9.0-7.el9_0.3, 0:140.8.0-1.el9_0, 0:140.8.0-2.el9_0
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:1.9.0-7.el9_2.3, 0:140.8.0-1.el9_2, 0:140.8.0-2.el9_2
  • Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support 0:1.9.0-7.el9_4.3, 0:140.8.0-1.el9_4, 0:140.8.0-2.el9_4
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:1.9.0-9.el9_6.1, 0:140.8.0-1.el9_6, 0:140.8.0-2.el9_6
  • Red Hat Red Hat AI Inference Server 3.3 1775680192, 1775680262, 1775749857, 1778244546
  • libvpx Debian 12 1.12.0-1+deb12u5
  • libvpx Debian 13 1.15.0-2.1+deb13u1
  • libvpx Debian 14 1.16.0-3
  • firefox-esr Debian 14, Debian 13, Debian 12 140.8.0esr-1
  • thunderbird Debian 14, Debian 13, Debian 12 1:140.8.0esr-1

debian advisories DEBIAN-CVE-2026-2447

  • libvpx Ubuntu 22.04 LTS 1.11.0-2ubuntu2.5
  • libvpx Ubuntu 24.04 LTS 1.14.0-1ubuntu2.3
  • libvpx Ubuntu 25.10 1.15.0-2.1ubuntu0.1
  • libvpx Ubuntu 26.04 LTS 1.16.0-2ubuntu1

ubuntu advisories UBUNTU-CVE-2026-2447

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libvpx RHEL 10.1 1.14.1-6.el10_1
  • libvpx RHEL 9 1.9.0-10.el9_7
  • libvpx RHEL 8 1.7.0-13.el8_10
  • thunderbird RHEL 9 140.8.0-1.el9_7
  • thunderbird RHEL 10.1 140.8.0-2.el10_1
  • thunderbird RHEL 8 140.8.0-1.el8_10
  • firefox RHEL 10.1 140.8.0-2.el10_1
  • firefox RHEL 9 140.8.0-2.el9_7

red hat advisories RHSA-2026:5326RHSA-2026:5323RHSA-2026:5324RHSA-2026:5319RHSA-2026:5320RHSA-2026:5231

  • MozillaThunderbird SLE Workstation Extension 15 SP7, SLE Module for Package Hub 15 SP7, openSUSE Leap 15.6 140.7.2-150200.8.257.1
  • MozillaFirefox SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +9 more 140.7.1-150200.152.219.1
  • MozillaFirefox SLES for SAP applications 16.0, SLES 16.0 140.7.1-160000.1.1
  • MozillaFirefox SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 140.7.1-112.298.1

suse advisories SUSE-SU-2026:0692-1SUSE-SU-2026:0611-1SUSE-SU-2026:0602-1SUSE-SU-2026:20582-1

  • libvpx openSUSE Tumbleweed 1.17.0-1.1
  • MozillaThunderbird openSUSE Leap 16.0 140.8.1-bp160.1.1
  • MozillaFirefox openSUSE Leap 16.0 140.7.1-160000.1.1
  • MozillaFirefox openSUSE Tumbleweed 147.0.4-1.1
  • MozillaThunderbird openSUSE Tumbleweed 140.7.2-1.1
  • firefox-esr openSUSE Tumbleweed 140.7.1-1.1

opensuse advisories openSUSE-SU-2026:12106-1openSUSE-SU-2026:20391-1openSUSE-SU-2026:20253-1openSUSE-SU-2026:10225-1openSUSE-SU-2026:10218-1openSUSE-SU-2026:10212-1

  • libvpx AlmaLinux 10 1.14.1-6.el10_1
  • libvpx AlmaLinux 9 1.9.0-10.el9_7
  • libvpx AlmaLinux 8 1.7.0-13.el8_10
  • thunderbird AlmaLinux 8 140.8.0-1.el8_10.alma.1
  • thunderbird AlmaLinux 9 140.8.0-1.el9_7.alma.1
  • thunderbird AlmaLinux 10 140.8.0-2.el10_1.alma.1
  • firefox AlmaLinux 8 140.8.0-2.el8_10.alma.1
  • firefox AlmaLinux 9 140.8.0-2.el9_7.alma.1

almalinux advisories ALSA-2026:4629ALSA-2026:4447ALSA-2026:3967ALSA-2026:3515ALSA-2026:3516ALSA-2026:3517

  • libvpx Rocky Linux 10 1.14.1-6.el10_1
  • libvpx Rocky Linux 9 1.9.0-10.el9_7
  • libvpx Rocky Linux 8 1.7.0-13.el8_10
  • thunderbird Rocky Linux 10 140.8.0-2.el10_1
  • thunderbird Rocky Linux 9 140.8.0-1.el9_7
  • thunderbird Rocky Linux 8 140.8.0-1.el8_10
  • firefox Rocky Linux 10 140.8.0-2.el10_1
  • firefox Rocky Linux 9 140.8.0-2.el9_7

rocky linux advisories RLSA-2026:4629RLSA-2026:4447RLSA-2026:3967RLSA-2026:3517RLSA-2026:3516RLSA-2026:3515

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-2447 updated cvss 7.5

libvpx: Heap buffer overflow in libvpx

  • Red Hat Enterprise Linux 6 libvpx, firefox, libvpx-utils
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 10 rhel8/flatpak-runtime
    affected: workaround, no fix available
  • Red Hat AI Inference Server 3.3 rhaiis 1775680192, rhaiis 1775680262, rhaiis 1775749857, rhaiis 1778244546
    fixed: vendor fix RHSA-2026:8748
  • Red Hat CodeReady Linux Builder EUS (v.9.4) libvpx-devel 1.9.0-7.el9_4.3, libvpx-debuginfo 1.9.0-7.el9_4.3, libvpx-debugsource 1.9.0-7.el9_4.3, libvpx-utils-debuginfo 1.9.0-7.el9_4.3
    fixed: vendor fix RHSA-2026:5324
  • Red Hat CodeReady Linux Builder EUS (v.9.6) libvpx-devel 1.9.0-9.el9_6.1, libvpx-debuginfo 1.9.0-9.el9_6.1, libvpx-debugsource 1.9.0-9.el9_6.1, libvpx-utils-debuginfo 1.9.0-9.el9_6.1
    fixed: vendor fix RHSA-2026:5231
  • Red Hat Enterprise Linux AppStream (v. 8) libvpx 1.7.0-13.el8_10, firefox 140.8.0-2.el8_10, thunderbird 140.8.0-1.el8_10
    fixed: vendor fix RHSA-2026:3338
  • Red Hat Enterprise Linux AppStream (v. 9) libvpx 1.9.0-10.el9_7, firefox 140.8.0-2.el9_7, firefox-x11 140.8.0-2.el9_7, thunderbird 140.8.0-1.el9_7
    fixed: vendor fix RHSA-2026:3339
  • Red Hat Enterprise Linux AppStream (v. 10) libvpx 1.14.1-6.el10_1, firefox 140.8.0-2.el10_1, thunderbird 140.8.0-2.el10_1
    fixed: vendor fix RHSA-2026:3361
show 18 more
  • Red Hat Enterprise Linux AppStream AUS (v. 8.2) libvpx 1.7.0-8.el8_2.2, firefox 140.8.0-2.el8_2, thunderbird 140.8.0-1.el8_2
    fixed: vendor fix RHSA-2026:3492
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) firefox 140.8.0-2.el8_4, libvpx 1.7.0-10.el8_4.2, thunderbird 140.8.0-2.el8_4
    fixed: vendor fix RHSA-2026:3491
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) firefox 140.8.0-2.el8_6, libvpx 1.7.0-10.el8_6.2, thunderbird 140.8.0-1.el8_6 Red Hat Enterprise Linux AppStream E4S (v.8.6) firefox 140.8.0-2.el8_6, libvpx 1.7.0-10.el8_6.2, thunderbird 140.8.0-1.el8_6
    fixed: vendor fix RHSA-2026:3495
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) firefox 140.8.0-2.el8_8, libvpx 1.7.0-10.el8_8.2, thunderbird 140.8.0-1.el8_8
    fixed: vendor fix RHSA-2026:3494
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) libvpx 1.9.0-7.el9_0.3, firefox 140.8.0-2.el9_0, thunderbird 140.8.0-1.el9_0
    fixed: vendor fix RHSA-2026:3493
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) libvpx 1.9.0-7.el9_2.3, firefox 140.8.0-2.el9_2, firefox-x11 140.8.0-2.el9_2, thunderbird 140.8.0-1.el9_2
    fixed: vendor fix RHSA-2026:4152
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) firefox 140.8.0-2.el10_0, libvpx 1.14.1-3.el10_0.1, thunderbird 140.8.0-2.el10_0
    fixed: vendor fix RHSA-2026:3976
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) libvpx 1.9.0-7.el9_4.3, firefox 140.8.0-2.el9_4, firefox-x11 140.8.0-2.el9_4, thunderbird 140.8.0-1.el9_4
    fixed: vendor fix RHSA-2026:3496
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) libvpx 1.9.0-9.el9_6.1, firefox 140.8.0-2.el9_6, firefox-x11 140.8.0-2.el9_6, thunderbird 140.8.0-1.el9_6
    fixed: vendor fix RHSA-2026:3497
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) firefox 140.8.0-2.el8_4, libvpx 1.7.0-10.el8_4.2, thunderbird 140.8.0-2.el8_4
    fixed: vendor fix RHSA-2026:3491
  • Red Hat Enterprise Linux AppStream TUS (v.8.6) firefox 140.8.0-2.el8_6, libvpx 1.7.0-10.el8_6.2, thunderbird 140.8.0-1.el8_6
    fixed: vendor fix RHSA-2026:3495
  • Red Hat Enterprise Linux AppStream TUS (v.8.8) firefox 140.8.0-2.el8_8, libvpx 1.7.0-10.el8_8.2, thunderbird 140.8.0-1.el8_8
    fixed: vendor fix RHSA-2026:3494
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libvpx-devel 1.9.0-10.el9_7, libvpx-debuginfo 1.9.0-10.el9_7, libvpx-debugsource 1.9.0-10.el9_7, libvpx-utils-debuginfo 1.9.0-10.el9_7
    fixed: vendor fix RHSA-2026:4447
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libvpx-devel 1.14.1-6.el10_1, libvpx-debuginfo 1.14.1-6.el10_1, libvpx-debugsource 1.14.1-6.el10_1, libvpx-utils-debuginfo 1.14.1-6.el10_1
    fixed: vendor fix RHSA-2026:4629
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libvpx-devel 1.14.1-3.el10_0.1, libvpx-debuginfo 1.14.1-3.el10_0.1, libvpx-debugsource 1.14.1-3.el10_0.1, libvpx-utils-debuginfo 1.14.1-3.el10_0.1
    fixed: vendor fix RHSA-2026:5227
  • Red Hat Enterprise Linux CRB (v. 8) libvpx-devel 1.7.0-13.el8_10, libvpx-debuginfo 1.7.0-13.el8_10, libvpx-debugsource 1.7.0-13.el8_10, libvpx-utils-debuginfo 1.7.0-13.el8_10
    fixed: vendor fix RHSA-2026:3967
  • Red Hat Enterprise Linux Server (v. 7 ELS) libvpx 1.3.0-8.el7_9.3, firefox 140.8.0-2.el7_9
    fixed: vendor fix RHSA-2026:3984
  • Red Hat Enterprise Linux Server Optional (v. 7 ELS) libvpx-utils 1.3.0-8.el7_9.3
    fixed: vendor fix RHSA-2026:5320

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
8 mo ago

Exploit prediction

0.70% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • Mozilla Firefox
  • Mozilla Thunderbird
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
  • Red Hat Red Hat AI Inference Server 3.3
  • Red Hat Red Hat Enterprise Linux 6

Classification

Weakness
  • CWE-122 Heap-based Buffer Overflow

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.