Heap-based buffer overflow in Google Chromium - CVE-2026-7339

Vulnerability identifier: #VU128442

CSH Severity: Medium

CVSS v4: 7.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-7339

CWE-ID: CWE-122

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted HTML content in WebRTC. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Google Chromium
Google Chrome
Debian Linux
Fedora
Chrome OS
chromium
chromium (Debian package)

Install update from vendor's website.

Google Chromium - update to 147.0.7727.137
Google Chrome - update to 147.0.7727.137
Chrome OS - update to 144.0.7559.256
chromium - addressed in versions 147.0.7727.137-1.el9, 147.0.7727.137-1.el10_1, 147.0.7727.137-1.el10_3, 147.0.7727.137-1.fc42, 147.0.7727.137-1.fc43, 147.0.7727.137-1.fc44
chromium (Debian package) - addressed in versions 147.0.7727.137-1~deb12u1, 147.0.7727.137-1~deb13u1

• https://chromereleases.googleblog.com/2026/04/stable-channel-update-for-desktop_28.html
• https://crbug.com/493957495

• Multiple vulnerabilities in Google Chrome
• Fedora 42 update for chromium
• Fedora 44 update for chromium
• Fedora 43 update for chromium
• Fedora EPEL 9 update for chromium
• Fedora EPEL 10.1 update for chromium
• Fedora EPEL 10.3 update for chromium
• Debian update for chromium
• Multiple vulnerabilities in Google ChromeOS LTS