Use-after-free in Mozilla products - CVE-2026-92027

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Main Vulnerability Database Vulnerabilities #VU150051

Use-after-free in Mozilla products - CVE-2026-92027

Published: September 15, 2026


Vulnerability identifier: #VU150051
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-92027
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to cause memory corruption.

The vulnerability exists due to use-after-free in the DOM: Streams component when processing web content. A remote attacker can trick the victim into visiting a specially crafted website to cause memory corruption.

User interaction is required to visit the crafted website.


Affected software

Mozilla Firefox
Firefox ESR
Firefox for Android
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
Debian Linux
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Desktop 15
Anolis OS
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Desktop Applications Module
openSUSE Leap
openEuler
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
firefox-debuginfo
firefox
firefox-debugsource
firefox (Red Hat package)
MozillaFirefox-devel
MozillaFirefox-debugsource
MozillaFirefox
MozillaFirefox-debuginfo
MozillaFirefox-translations-common
MozillaFirefox-branding-upstream
MozillaFirefox-translations-other
firefox-esr (Debian package)

How to mitigate CVE-2026-92027

Install security update from vendor's website.

Mozilla Firefox - update to 156.0
Firefox for Android - update to 156.0
Firefox ESR - addressed in versions 115.41.0, 140.16.0, 153.3.0
firefox-debuginfo - update to 140.16.0-1
firefox - update to 140.16.0-1
firefox-debugsource - update to 140.16.0-1
firefox - addressed in versions 140.16.0-1, 140.17.0-1.0.1
firefox (Red Hat package) - addressed in versions 140.16.0-1.el7_9, 140.16.0-1.el8_4, 140.16.0-1.el8_6, 140.16.0-1.el8_8, 140.16.0-1.el8_10, 140.16.0-1.el9_2, 140.16.0-1.el9_4, 140.16.0-1.el9_6, 140.16.0-1.el10_0, 140.16.0-1.el10_2
MozillaFirefox-devel - addressed in versions 153.3.0-118.8.1, 153.3.0-150400.157.8.1
MozillaFirefox-debugsource - addressed in versions 153.3.0-118.8.1, 153.3.0-150400.157.8.1
MozillaFirefox - addressed in versions 153.3.0-118.8.1, 153.3.0-150400.157.8.1
MozillaFirefox-debuginfo - addressed in versions 153.3.0-118.8.1, 153.3.0-150400.157.8.1
MozillaFirefox-translations-common - addressed in versions 153.3.0-118.8.1, 153.3.0-150400.157.8.1
MozillaFirefox-branding-upstream - update to 153.3.0-150400.157.8.1
MozillaFirefox-translations-other - update to 153.3.0-150400.157.8.1
firefox-esr (Debian package) - update to 140.16.0esr-1~deb13u1

External References

Related Security Bulletins