CVE-2026-6748

EUVD-2026-24089
Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 32%
Affected Products (NVD)
VendorProductVersion
mozillafirefox_esr
𝑥
< 140.10.0
mozillafirefox
𝑥
< 150.0
mozillathunderbird_esr
𝑥
< 140.10.0
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
Red HatRed Hat Enterprise Linux 10
0:140.10.0-1.el10_1 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 10
0:140.10.0-1.el10_2 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 10
0:140.10.0-1.el10_1 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 10
0:140.10.0-1.el10_2 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 10.0 Extended Update Support
0:140.10.0-1.el10_0 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 10.0 Extended Update Support
0:140.10.0-1.el10_0 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 7 Extended Lifecycle Support
0:140.10.0-2.el7_9 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 8
0:140.10.0-1.el8_10 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 8
0:140.10.0-1.el8_10 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
0:140.10.0-1.el8_4 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
0:140.10.0-1.el8_4 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
0:140.10.0-1.el8_4 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
0:140.10.0-1.el8_4 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
0:140.10.0-1.el8_6 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
0:140.10.0-1.el8_6 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 8.6 Telecommunications Update Service
0:140.10.0-1.el8_6 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 8.6 Telecommunications Update Service
0:140.10.0-1.el8_6 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 8.6 Update Services for SAP Solutions
0:140.10.0-1.el8_6 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 8.6 Update Services for SAP Solutions
0:140.10.0-1.el8_6 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Service
0:140.10.0-1.el8_8 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Service
0:140.10.0-1.el8_8 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutions
0:140.10.0-1.el8_8 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutions
0:140.10.0-1.el8_8 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 9
0:140.10.0-1.el9_7 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 9
0:140.10.0-1.el9_8 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 9
0:140.10.0-1.el9_7 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 9
0:140.10.1-1.el9_8 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 9.0 Update Services for SAP Solutions
0:140.10.0-1.el9_0 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 9.0 Update Services for SAP Solutions
0:140.10.0-1.el9_0 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutions
0:140.10.0-1.el9_2 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutions
0:140.10.0-1.el9_2 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 9.4 Extended Update Support
0:140.10.0-1.el9_4 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 9.4 Extended Update Support
0:140.10.0-1.el9_4 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 9.6 Extended Update Support
0:140.10.0-1.el9_6 ≤
𝑥
< *
ADP
Red HatRed Hat Enterprise Linux 9.6 Extended Update Support
0:140.10.0-1.el9_6 ≤
𝑥
< *
ADP
Debian logo
Debian Releases
Debian Product
Codename
firefox
sid
152.0.6-1
fixed
firefox-esr
bookworm
140.12.0esr-1~deb12u1
fixed
bookworm (security)
140.12.0esr-1~deb12u1
fixed
bullseye
vulnerable
bullseye (security)
140.12.0esr-1~deb11u1
fixed
forky
140.12.0esr-1
fixed
sid
140.12.0esr-1
fixed
trixie
140.12.0esr-1~deb13u1
fixed
trixie (security)
140.12.0esr-1~deb13u1
fixed
thunderbird
bookworm
1:140.12.0esr-1~deb12u1
fixed
bookworm (security)
1:140.12.0esr-1~deb12u1
fixed
bullseye
vulnerable
bullseye (security)
1:140.12.0esr-1~deb11u1
fixed
forky
1:140.12.0esr-1
fixed
sid
1:140.12.0esr-1
fixed
trixie
1:140.12.0esr-1~deb13u1
fixed
trixie (security)
1:140.12.0esr-1~deb13u1
fixed
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
MozillaFirefox
suse enterprise desktop 15 SP7
140.10.0-150200.152.231.1
fixed
suse enterprise sap 15 SP4
140.10.0-150200.152.231.1
fixed
suse enterprise sap 15 SP5
140.10.0-150200.152.231.1
fixed
suse enterprise sap 15 SP6
140.10.0-150200.152.231.1
fixed
suse enterprise sap 15 SP7
140.10.0-150200.152.231.1
fixed
suse enterprise server 12 SP3
140.10.0-112.310.1
fixed
suse enterprise server 12 SP5
140.10.0-112.310.1
fixed
suse enterprise server 15 SP4
140.10.0-150200.152.231.1
fixed
suse enterprise server 15 SP5
140.10.0-150200.152.231.1
fixed
suse enterprise server 15 SP6
140.10.0-150200.152.231.1
fixed
suse enterprise server 15 SP7
140.10.0-150200.152.231.1
fixed
MozillaFirefox-devel
suse enterprise desktop 15 SP7
140.10.0-150200.152.231.1
fixed
suse enterprise sap 15 SP4
140.10.0-150200.152.231.1
fixed
suse enterprise sap 15 SP5
140.10.0-150200.152.231.1
fixed
suse enterprise sap 15 SP6
140.10.0-150200.152.231.1
fixed
suse enterprise sap 15 SP7
140.10.0-150200.152.231.1
fixed
suse enterprise server 12 SP3
140.10.0-112.310.1
fixed
suse enterprise server 12 SP5
140.10.0-112.310.1
fixed
suse enterprise server 15 SP4
140.10.0-150200.152.231.1
fixed
suse enterprise server 15 SP5
140.10.0-150200.152.231.1
fixed
suse enterprise server 15 SP6
140.10.0-150200.152.231.1
fixed
suse enterprise server 15 SP7
140.10.0-150200.152.231.1
fixed
MozillaFirefox-translations-common
suse enterprise desktop 15 SP7
140.10.0-150200.152.231.1
fixed
suse enterprise sap 15 SP4
140.10.0-150200.152.231.1
fixed
suse enterprise sap 15 SP5
140.10.0-150200.152.231.1
fixed
suse enterprise sap 15 SP6
140.10.0-150200.152.231.1
fixed
suse enterprise sap 15 SP7
140.10.0-150200.152.231.1
fixed
suse enterprise server 12 SP3
140.10.0-112.310.1
fixed
suse enterprise server 12 SP5
140.10.0-112.310.1
fixed
suse enterprise server 15 SP4
140.10.0-150200.152.231.1
fixed
suse enterprise server 15 SP5
140.10.0-150200.152.231.1
fixed
suse enterprise server 15 SP6
140.10.0-150200.152.231.1
fixed
suse enterprise server 15 SP7
140.10.0-150200.152.231.1
fixed
MozillaFirefox-translations-other
suse enterprise desktop 15 SP7
140.10.0-150200.152.231.1
fixed
suse enterprise sap 15 SP4
140.10.0-150200.152.231.1
fixed
suse enterprise sap 15 SP5
140.10.0-150200.152.231.1
fixed
suse enterprise sap 15 SP6
140.10.0-150200.152.231.1
fixed
suse enterprise sap 15 SP7
140.10.0-150200.152.231.1
fixed
suse enterprise server 15 SP4
140.10.0-150200.152.231.1
fixed
suse enterprise server 15 SP5
140.10.0-150200.152.231.1
fixed
suse enterprise server 15 SP6
140.10.0-150200.152.231.1
fixed
suse enterprise server 15 SP7
140.10.0-150200.152.231.1
fixed
MozillaThunderbird
suse enterprise desktop 15 SP7
140.10.1-150200.8.271.1
fixed
suse enterprise sap 15 SP7
140.10.1-150200.8.271.1
fixed
suse enterprise server 15 SP7
140.10.1-150200.8.271.1
fixed
suse enterprise workstation 15 SP7
140.10.1-150200.8.271.1
fixed
MozillaThunderbird-translations-common
suse enterprise desktop 15 SP7
140.10.1-150200.8.271.1
fixed
suse enterprise sap 15 SP7
140.10.1-150200.8.271.1
fixed
suse enterprise server 15 SP7
140.10.1-150200.8.271.1
fixed
suse enterprise workstation 15 SP7
140.10.1-150200.8.271.1
fixed
MozillaThunderbird-translations-other
suse enterprise desktop 15 SP7
140.10.1-150200.8.271.1
fixed
suse enterprise sap 15 SP7
140.10.1-150200.8.271.1
fixed
suse enterprise server 15 SP7
140.10.1-150200.8.271.1
fixed
suse enterprise workstation 15 SP7
140.10.1-150200.8.271.1
fixed
Red Hat logo
Red Hat Enterprise Linux Releases
Red Hat Product
Release
firefox
RHEL 9
0:140.10.0-1.el9_8
fixed
firefox-x11
RHEL 9
0:140.10.0-1.el9_8
fixed
thunderbird
RHEL 9
0:140.10.1-1.el9_8
fixed
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
firefox
Amazon Linux 2023
0:140.10.1-1.amzn2023.0.1
fixed
firefox-debuginfo
Amazon Linux 2023
0:140.10.1-1.amzn2023.0.1
fixed
firefox-debugsource
Amazon Linux 2023
0:140.10.1-1.amzn2023.0.1
fixed
thunderbird
Amazon Linux 2
0:140.10.0-1.amzn2.0.1
fixed
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://bugzilla.mozilla.org/show_bug.cgi?id=2022604
https://www.mozilla.org/security/advisories/mfsa2026-30/
https://www.mozilla.org/security/advisories/mfsa2026-32/
https://www.mozilla.org/security/advisories/mfsa2026-33/
https://www.mozilla.org/security/advisories/mfsa2026-34/
https://access.redhat.com/errata/RHSA-2026:10757
https://access.redhat.com/errata/RHSA-2026:10766
https://access.redhat.com/errata/RHSA-2026:10767
https://access.redhat.com/errata/RHSA-2026:12285
https://access.redhat.com/errata/RHSA-2026:13537
https://access.redhat.com/errata/RHSA-2026:15892
https://access.redhat.com/errata/RHSA-2026:17477
https://access.redhat.com/errata/RHSA-2026:17687
https://access.redhat.com/errata/RHSA-2026:17688
https://access.redhat.com/errata/RHSA-2026:17689
https://access.redhat.com/errata/RHSA-2026:17690
https://access.redhat.com/errata/RHSA-2026:19041
https://access.redhat.com/errata/RHSA-2026:19131
https://access.redhat.com/errata/RHSA-2026:19201
https://access.redhat.com/errata/RHSA-2026:19348
https://access.redhat.com/errata/RHSA-2026:19461
https://access.redhat.com/errata/RHSA-2026:19462
https://access.redhat.com/errata/RHSA-2026:19463
https://access.redhat.com/errata/RHSA-2026:19464
https://access.redhat.com/errata/RHSA-2026:19465
https://access.redhat.com/errata/RHSA-2026:19466
https://access.redhat.com/errata/RHSA-2026:19467
https://access.redhat.com/errata/RHSA-2026:19468
https://access.redhat.com/errata/RHSA-2026:19469
https://access.redhat.com/errata/RHSA-2026:19542
https://access.redhat.com/errata/RHSA-2026:19655
https://access.redhat.com/errata/RHSA-2026:19704
https://access.redhat.com/security/cve/CVE-2026-6748
https://bugzilla.redhat.com/show_bug.cgi?id=2460103
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6748.json