Buffer overflow in Mozilla products - CVE-2025-9184

Vulnerability identifier: #VU114393

CSH Severity: High

CVSS v4 BT: 6.1 [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-2025-9184

CWE-ID: CWE-119

Exploitation vector: Remote access

Exploit availability: No public exploit available

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.

Firefox for Android
Firefox Focus for Android
Mozilla Firefox
Firefox ESR
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 15 SP3
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Real Time 15
SUSE Enterprise Storage
SUSE Package Hub 15
Desktop Applications Module
openSUSE Leap
Ubuntu
Mozilla Thunderbird
MozillaFirefox-devel
MozillaFirefox-translations-common
MozillaFirefox-debuginfo
MozillaFirefox
MozillaFirefox-debugsource
MozillaThunderbird-debugsource
MozillaThunderbird
MozillaThunderbird-translations-common
MozillaThunderbird-debuginfo
MozillaThunderbird-translations-other
MozillaFirefox-translations-other
MozillaFirefox-branding-upstream
thunderbird (Ubuntu package)

Install updates from vendor's website.

Firefox for Android - update to 142.0
Mozilla Firefox - update to 142.0
Firefox ESR - update to 140.2.0
Firefox Focus for Android - update to 142.0
Mozilla Thunderbird - addressed in versions 140.2, 142.0
MozillaFirefox-devel - addressed in versions 140.2.0-112.276.1, 140.2.0-150200.152.198.1
MozillaFirefox-translations-common - addressed in versions 140.2.0-112.276.1, 140.2.0-150200.152.198.1
MozillaFirefox-debuginfo - addressed in versions 140.2.0-112.276.1, 140.2.0-150200.152.198.1
MozillaFirefox - addressed in versions 140.2.0-112.276.1, 140.2.0-150200.152.198.1
MozillaFirefox-debugsource - addressed in versions 140.2.0-112.276.1, 140.2.0-150200.152.198.1
MozillaThunderbird-debugsource - update to 140.2.0-150200.8.236.1
MozillaThunderbird - update to 140.2.0-150200.8.236.1
MozillaThunderbird-translations-common - update to 140.2.0-150200.8.236.1
MozillaThunderbird-debuginfo - update to 140.2.0-150200.8.236.1
MozillaThunderbird-translations-other - update to 140.2.0-150200.8.236.1
MozillaFirefox-translations-other - update to 140.2.0-150200.152.198.1
MozillaFirefox-branding-upstream - update to 140.2.0-150200.152.198.1
thunderbird (Ubuntu package) - update to 1:140.7.1+build1-0ubuntu0.22.04.1

• https://www.mozilla.org/security/advisories/mfsa2025-64/
• https://www.mozilla.org/security/advisories/mfsa2025-67/

• Multiple vulnerabilities in Mozilla Firefox
• Multiple vulnerabilities in Mozilla Thunderbird 140.x
• Multiple vulnerabilities in Thunderbird
• SUSE update for MozillaThunderbird
• SUSE update for MozillaFirefox
• SUSE update for MozillaFirefox
• Ubuntu update for thunderbird