Buffer overflow in Mozilla products - CVE-2025-4091

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Main Vulnerability Database Vulnerabilities #VU108049

Buffer overflow in Mozilla products - CVE-2025-4091

Published: April 29, 2025


Vulnerability identifier: #VU108049
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-4091
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing HTML content. A remote attacker can create a specially crafted website, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


Affected software

Firefox for Android
Mozilla Firefox
Firefox ESR
Debian Linux
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15 SP3
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Desktop 15
Anolis OS
SUSE Enterprise Storage
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Slackware Linux
SUSE Package Hub 15
Desktop Applications Module
openSUSE Leap
openEuler
Ubuntu
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
mozilla-firefox
mozilla-thunderbird
firefox-esr (Debian package)
thunderbird (Debian package)
firefox-debuginfo
firefox
firefox-debugsource
firefox (Red Hat package)
thunderbird (Red Hat package)
thunderbird
MozillaThunderbird-translations-common
MozillaThunderbird-translations-other
MozillaThunderbird
MozillaThunderbird-debuginfo
MozillaThunderbird-debugsource
MozillaFirefox
MozillaFirefox-debugsource
MozillaFirefox-devel
MozillaFirefox-debuginfo
MozillaFirefox-translations-common
MozillaFirefox-branding-upstream
MozillaFirefox-translations-other
thunderbird-debuginfo
thunderbird-debugsource
thunderbird-librnp-rnp
thunderbird-wayland
thunderbird (Ubuntu package)
Mozilla Thunderbird

How to mitigate CVE-2025-4091

Install updates from vendor's website.

Firefox for Android - update to 138.0
Mozilla Firefox - update to 138.0
Firefox ESR - update to 128.10.0
Mozilla Thunderbird - addressed in versions 128.10, 138.0
mozilla-firefox - update to 128.10.0esr
mozilla-thunderbird - update to 128.10.0esr
firefox-esr (Debian package) - update to 128.10.0esr-1~deb12u1
thunderbird (Debian package) - update to 1:128.10.0esr-1~deb12u1
firefox-debuginfo - update to 128.10.0-1
firefox - update to 128.10.0-1
firefox-debugsource - update to 128.10.0-1
firefox (Red Hat package) - addressed in versions 128.10.0-1.el7_9, 128.10.0-1.el8_2, 128.10.0-1.el8_4, 128.10.0-1.el8_6, 128.10.0-1.el8_8, 128.10.0-1.el8_10, 128.10.0-1.el9_0, 128.10.0-1.el9_2, 128.10.0-1.el9_4, 128.10.0-1.el9_5
thunderbird (Red Hat package) - addressed in versions 128.10.0-1.el8_10, 128.10.0-1.el9_5
firefox - addressed in versions 128.10.0-1.0.1, 128.10.0-1.0.2
thunderbird - update to 128.10.0-1.0.1
MozillaThunderbird-translations-common - update to 128.10.0-150200.8.212.1
MozillaThunderbird-translations-other - update to 128.10.0-150200.8.212.1
MozillaThunderbird - update to 128.10.0-150200.8.212.1
MozillaThunderbird-debuginfo - update to 128.10.0-150200.8.212.1
MozillaThunderbird-debugsource - update to 128.10.0-150200.8.212.1
MozillaFirefox - update to 128.10.0-150200.152.179.1
MozillaFirefox-debugsource - update to 128.10.0-150200.152.179.1
MozillaFirefox-devel - update to 128.10.0-150200.152.179.1
MozillaFirefox-debuginfo - update to 128.10.0-150200.152.179.1
MozillaFirefox-translations-common - update to 128.10.0-150200.152.179.1
MozillaFirefox-branding-upstream - update to 128.10.0-150200.152.179.1
MozillaFirefox-translations-other - update to 128.10.0-150200.152.179.1
thunderbird - update to 128.11.1-1
thunderbird-debuginfo - update to 128.11.1-1
thunderbird-debugsource - update to 128.11.1-1
thunderbird-librnp-rnp - update to 128.11.1-1
thunderbird-wayland - update to 128.11.1-1
thunderbird (Ubuntu package) - update to 1:128.12.0+build1-0ubuntu0.22.04.1

External References

Related Security Bulletins