HIGH

CVE-2026-2447

Heap buffer overflow in libvpx

CVSS v3

8.8

HIGH

EPSS Score

0.7 %

exploit probability, as of 2026-10-19

CISA KEV

known exploited

Exploitation

none

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

firefoxAlmaLinux:10all versions · fixed in 140.8.0-2.el10_1
firefoxAlmaLinux:9all versions · fixed in 140.8.0-2.el9_7.alma.1and 1 other package
firefoxAlmaLinux:8all versions · fixed in 140.8.0-2.el8_10.alma.1
libvpxAlmaLinux:10all versions · fixed in 1.14.1-6.el10_1and 1 other package
libvpxAlmaLinux:9all versions · fixed in 1.9.0-10.el9_7and 1 other package
libvpxAlmaLinux:8all versions · fixed in 1.7.0-13.el8_10and 1 other package
thunderbirdAlmaLinux:10all versions · fixed in 140.8.0-2.el10_1.alma.1
thunderbirdAlmaLinux:9all versions · fixed in 140.8.0-1.el9_7.alma.1

1 more package range on OSV.dev

Vendor advisories

CVE-2026-2447 Red Hat Product Security721 products fixed · 7 known affected
libvpx: Heap buffer overflow in libvpx
rhel10/firefox-flatpak as a component of Red Hat Enterprise Linux 10 · firefox as a component of Red Hat Enterprise Linux 6 · firefox.src as a component of Red Hat Enterprise Linux 6
RHSA-2026:16174 Red Hat Product Security3 products fixed
Red Hat Security Advisory: Red Hat AI Inference Server 3.3.3 (Spyre)
RHSA-2026:8748 Red Hat Product Security2 products fixed
Red Hat Security Advisory: Red Hat AI Inference Server Model Optimization Tools 3.3.1 (CUDA)
RHSA-2026:8746 Red Hat Product Security2 products fixed
Red Hat Security Advisory: Red Hat AI Inference Server 3.3.1 (CUDA)
RHSA-2026:8747 Red Hat Product Security1 product fixed
Red Hat Security Advisory: Red Hat AI Inference Server 3.3.1 (ROCm)
RHSA-2026:5326 Red Hat Product Security21 products fixed
Red Hat Security Advisory: libvpx security update

37 more advisories

Full record on NVD

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.

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published: 2026-02-16
Last Modified: 2026-04-13

Frequently asked questions

What is 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.

Is CVE-2026-2447 actively exploited?

Active exploitation of CVE-2026-2447 has not been confirmed. Its EPSS score was 0.7% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-2447?

CVE-2026-2447 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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