Buffer overflow in Mozilla Firefox and Firefox ESR - CVE-2025-0242

Vulnerability identifier: #VU102423

CSH Severity: High

CVSS v4.0: 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/E:U/U:Amber

CVE-ID: CVE-2025-0242

CWE-ID: CWE-119

Exploitation vector: Remote access

Exploit availability: No public exploit available

Affected software:
Mozilla Firefox
Firefox ESR
SeaMonkey
SUSE Linux Enterprise Server 15 SP4
Gentoo Linux
Debian Linux
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Desktop 15 SP4
SUSE Linux Enterprise Server 15 SP3
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing ESPOS 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
SUSE Linux Enterprise Workstation Extension 15
Anolis OS
SUSE Enterprise Storage
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for x86_64
Fedora
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
Desktop Applications Module
SUSE Package Hub 15
openSUSE Leap
Ubuntu
openEuler
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
seamonkey
www-client/firefox
mozilla-thunderbird
mozilla-firefox
firefox-esr (Debian package)
thunderbird (Debian package)
firefox-debuginfo
firefox-debugsource
firefox
firefox (Red Hat package)
thunderbird
thunderbird (Red Hat package)
MozillaFirefox-devel
MozillaFirefox-debugsource
MozillaFirefox-translations-common
MozillaFirefox-debuginfo
MozillaFirefox
MozillaThunderbird-translations-common
MozillaThunderbird-translations-other
MozillaThunderbird
MozillaThunderbird-debuginfo
MozillaThunderbird-debugsource
MozillaFirefox-translations-other
MozillaFirefox-branding-upstream
dev-lang/spidermonkey
mail-client/thunderbird
mail-client/thunderbird-bin
thunderbird-wayland
thunderbird-librnp-rnp
thunderbird-debuginfo
thunderbird-debugsource
thunderbird (Ubuntu package)
firefox (Ubuntu package)
Mozilla Thunderbird
Firefox for Android
Firefox Focus for Android

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 trick the victim into visiting a specially crafted website, trigger memory corruption and execute arbitrary code on the target system.

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

Install updates from vendor's website.

• https://bugzilla.mozilla.org/buglist.cgi?bug_id=1874523%2C1926454%2C1931873%2C1932169
• https://www.mozilla.org/security/advisories/mfsa2025-01/
• https://www.mozilla.org/security/advisories/mfsa2025-02/
• https://www.mozilla.org/security/advisories/mfsa2025-03/