Use-after-free in Google Chromium - CVE-2025-9864

Vulnerability identifier: #VU114891

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-2025-9864

CWE-ID: CWE-416

Exploitation vector: Remote access

Exploit availability: Public exploit is available

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error within the V8 component in Google Chrome. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger use-after-free error and execute arbitrary code on the target system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Google Chromium
Microsoft Edge
Google Chrome
Prisma Access Browser
Gentoo Linux
Debian Linux
Fedora
Chrome OS
chromium
cef
www-client/vivaldi
www-client/opera
www-client/microsoft-edge
www-client/google-chrome
www-client/chromium
chromium (Debian package)

Install update from vendor's website.

Google Chromium - update to 140.0.7339.80
Microsoft Edge - update to 140.0.3485.54
Google Chrome - update to 140.0.7339.80
chromium - addressed in versions 140.0.7339.80-1.el9, 140.0.7339.80-1.el10_2, 140.0.7339.80-1.fc41, 140.0.7339.80-1.fc42, 140.0.7339.80-1.fc43, 140.0.7339.127-1.el9, 140.0.7339.127-1.el10_2, 140.0.7339.127-1.fc41, 140.0.7339.127-1.fc42, 140.0.7339.127-1.fc43
cef - addressed in versions 140.1.15^chromium140.0.7339.207-3.fc42, 140.1.15^chromium140.0.7339.207-3.fc43
Chrome OS - update to 140.0.7339.201
Prisma Access Browser - update to 141.6.4.55
www-client/vivaldi - update to 7.7.3851.48
www-client/opera - update to 126.0.5744.0
www-client/microsoft-edge - update to 142.0.3595.53
www-client/google-chrome - update to 142.0.7444.59
www-client/chromium - update to 142.0.7444.134
chromium (Debian package) - addressed in versions 140.0.7339.80-1~deb12u1, 140.0.7339.80-1~deb13u1

• Exploit #12015 - my_v8_exploits (my try at recreating and exploiting some v8 CVEs) (October 8, 2025)

• https://chromereleases.googleblog.com/2025/09/stable-channel-update-for-desktop.html
• https://crbug.com/434513380

• Multiple vulnerabilities in Google Chrome
• Debian update for chromium
• Fedora 42 update for chromium
• Fedora EPEL 10.2 update for chromium
• Fedora EPEL 9 update for chromium
• Fedora 41 update for chromium
• Fedora 43 update for chromium
• Multiple vulnerabilities in Microsoft Edge
• Fedora EPEL 10.2 update for chromium
• Fedora 42 update for chromium
• Fedora EPEL 9 update for chromium
• Fedora 43 update for chromium
• Fedora 41 update for chromium
• Multiple vulnerabilities in Google ChromeOS
• Fedora 43 update for cef
• Fedora 42 update for cef
• Multiple vulnerabilities in Prisma Access Browser
• Gentoo update for Chromium, Google Chrome, Microsoft Edge, Opera, Vivaldi