8.8

CVE-2026-2447: mozilla firefox Heap-based Buffer Overflow

CVSS: 8.8v3.1HighModified
AliasesMGASA-2026-0044SUSE-SU-2026:0602-1SUSE-SU-2026:0611-1
Published 16-02-2026Last modified 15-07-2026
Open JSON

Vulnerability summary

CVE-2026-2447 is a high (CVSS 8.8) Heap-based Buffer Overflow vulnerability in mozilla firefox. EPSS estimates a 0.70% chance of exploitation in the next 30 days, higher than 52.2% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.70%
0%100%
Low · +0.08 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 26 · Related 3
OPENSUSE-SU-2026:20391-1RHSA-2026:3338RHSA-2026:3339RHSA-2026:3361RHSA-2026:3491RHSA-2026:3492

Timeline

  1. 16-02-2026
    PublishedVulnerability first disclosed.
  2. 15-07-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

0.70%

Chance of exploitation in the next 30 days

Percentile

52%

Versus all other CVEs

30-day change

+0.08 pp

From 0.62% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.70%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Suse17 products
  • MozillaFirefox&distro=SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS< 140.7.1-150200.152.219.1
  • MozillaFirefox&distro=SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS< 140.7.1-150200.152.219.1
  • MozillaFirefox&distro=SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS< 140.7.1-150200.152.219.1
  • MozillaFirefox&distro=SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS< 140.7.1-150200.152.219.1
  • MozillaFirefox&distro=SUSE Linux Enterprise Module for Desktop Applications 15 SP7< 140.7.1-150200.152.219.1
Opensuse7 products
  • firefox-esr&distro=openSUSE Tumbleweed< 140.7.1-1.1
  • libvpx&distro=openSUSE Tumbleweed< 1.17.0-1.1
  • MozillaFirefox&distro=openSUSE Leap 15.6< 140.7.1-150200.152.219.1
  • MozillaFirefox&distro=openSUSE Leap 16.0< 140.7.1-160000.1.1
  • MozillaFirefox&distro=openSUSE Tumbleweed< 147.0.4-1.1
Redhat6 products
  • libvpx< 0:1.7.0-13.el8_10 | < 0:1.9.0-10.el9_7 | < 0:1.14.1-6.el10_1 | < 0:1.14.1-3.el10_0.1 | < 0:1.7.0-8.el8_2.2 | < 0:1.7.0-10.el8_6.2 | < 0:1.7.0-10.el8_8.2 | < 0:1.9.0-9.el9_6.1 | < 0:1.9.0-7.el9_2.3 | < 0:1.3.0-8.el7_9.3 | < 0:1.7.0-10.el8_4.2 | < 0:1.9.0-7.el9_4.3 | < 0:1.9.0-7.el9_0.3
  • libvpx-debuginfo< 0:1.7.0-13.el8_10 | < 0:1.9.0-10.el9_7 | < 0:1.14.1-6.el10_1 | < 0:1.14.1-3.el10_0.1 | < 0:1.7.0-8.el8_2.2 | < 0:1.7.0-10.el8_6.2 | < 0:1.7.0-10.el8_8.2 | < 0:1.9.0-9.el9_6.1 | < 0:1.9.0-7.el9_2.3 | < 0:1.3.0-8.el7_9.3 | < 0:1.7.0-10.el8_4.2 | < 0:1.9.0-7.el9_4.3 | < 0:1.9.0-7.el9_0.3
  • libvpx-debugsource< 0:1.7.0-13.el8_10 | < 0:1.9.0-10.el9_7 | < 0:1.14.1-6.el10_1 | < 0:1.14.1-3.el10_0.1 | < 0:1.7.0-8.el8_2.2 | < 0:1.7.0-10.el8_6.2 | < 0:1.7.0-10.el8_8.2 | < 0:1.9.0-9.el9_6.1 | < 0:1.9.0-7.el9_2.3 | < 0:1.7.0-10.el8_4.2 | < 0:1.9.0-7.el9_4.3 | < 0:1.9.0-7.el9_0.3
  • libvpx-devel< 0:1.7.0-13.el8_10 | < 0:1.9.0-10.el9_7 | < 0:1.14.1-6.el10_1 | < 0:1.14.1-3.el10_0.1 | < 0:1.9.0-9.el9_6.1 | < 0:1.3.0-8.el7_9.3 | < 0:1.9.0-7.el9_4.3
  • libvpx-utils< 0:1.3.0-8.el7_9.3
Debian3 products
  • firefox-esr< 140.8.0esr-1
  • libvpx< 1.16.0-3 | < 1.12.0-1+deb12u5 | < 1.15.0-2.1+deb13u1 | < 1.9.0-1+deb11u5
  • thunderbird< 1:140.8.0esr-1
Chainguard2 products
  • firefox< 148.0-r0
  • firefox-esr< 140.7.1-r0
Mozilla2 products
  • firefox< 115.32.1 | < 147.0.4 | ≥ 116.0, < 140.7.1
  • thunderbird< 140.7.2 | ≥ 141.0, < 147.0.2
Ubuntu2 products
  • libvpxAll versions (No fix recorded) | < 1.11.0-2ubuntu2.5 | < 1.14.0-1ubuntu2.3 | < 1.15.0-2.1ubuntu0.1 | < 1.16.0-2ubuntu1
  • thunderbirdAll versions (No fix recorded)
Mageia1 product
  • libvpx< 1.12.0-1.5.mga9
Wolfi1 product
  • firefox< 148.0-r0

9 vendors · 41 products

References

78 links
Show all 78 references