Buffer overflow in Firefox for Android and Mozilla Firefox - CVE-2025-3034

Vulnerability identifier: #VU106365

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-2025-3034

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
Mozilla Firefox
Gentoo Linux
Ubuntu
Fedora
Mozilla Thunderbird
www-client/firefox
www-client/firefox-bin
mail-client/thunderbird
mail-client/thunderbird-bin
dev-lang/spidermonkey
firefox
thunderbird (Ubuntu package)

Install updates from vendor's website.

Firefox for Android - update to 137.0
Mozilla Firefox - update to 137.0
Mozilla Thunderbird - update to 137.0
www-client/firefox - update to 60.8.0
www-client/firefox-bin - update to 60.8.0
mail-client/thunderbird - update to 128.9.0
mail-client/thunderbird-bin - update to 128.9.0
dev-lang/spidermonkey - update to 128.9.0
firefox - addressed in versions 137.0-2.fc40, 137.0-2.fc41, 137.0-2.fc42
thunderbird (Ubuntu package) - update to 1:140.7.1+build1-0ubuntu0.22.04.1

• https://bugzilla.mozilla.org/buglist.cgi?bug_id=1894100%2C1934086%2C1950360
• https://www.mozilla.org/security/advisories/mfsa2025-20/

• Multiple vulnerabilities in Mozilla Firefox and Firefox ESR
• Multiple vulnerabilities in Mozilla Thunderbird
• Fedora 41 update for firefox
• Fedora 40 update for firefox
• Fedora 42 update for firefox
• Gentoo update for Mozilla Firefox
• Gentoo update for Mozilla Thunderbird
• Gentoo update for Spidermonkey
• Ubuntu update for thunderbird