CVE-2026-4444 in Chrome
Summary
by MITRE • 03/20/2026
Stack buffer overflow in WebRTC in Google Chrome prior to 146.0.7680.153 allowed a remote attacker to potentially exploit stack corruption via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 03/25/2026
This vulnerability represents a critical stack buffer overflow flaw in the WebRTC implementation within Google Chrome browsers. The issue stems from improper input validation and memory management within the WebRTC component that handles real-time communication protocols. When processing specially crafted HTML content containing malicious WebRTC parameters, the browser fails to properly bounds-check stack allocations, leading to potential memory corruption. The vulnerability is classified as high severity by Chromium security team due to its remote exploitability and potential for arbitrary code execution. The flaw exists in the stack-based memory allocation mechanisms that handle WebRTC signaling and media stream processing operations.
The technical exploitation of this buffer overflow occurs when a remote attacker crafts an HTML page containing malicious WebRTC configuration data that exceeds the allocated stack buffer size. This overflow can overwrite adjacent stack memory locations including return addresses, function pointers, and local variables. The vulnerability is particularly dangerous because it operates within the browser's rendering context, allowing attackers to execute arbitrary code with the privileges of the victim user. The stack corruption can lead to complete browser process compromise, potentially enabling further attacks such as privilege escalation or information disclosure. This type of vulnerability aligns with CWE-121 Stack-based Buffer Overflow, which specifically addresses buffer overflows occurring in stack memory regions.
Operationally, this vulnerability presents significant risk to users who browse the internet without proper security measures or updated browser versions. The remote exploitation capability means that simply visiting a malicious website could result in system compromise without any user interaction beyond normal browsing. Attackers can leverage this vulnerability to deploy malware, steal sensitive information, or establish persistent access to victim systems. The WebRTC functionality is commonly used in legitimate applications, making the attack surface broader than typical browser vulnerabilities. This vulnerability can be exploited through various attack vectors including malicious websites, phishing campaigns, or compromised web applications that utilize WebRTC features.
Mitigation strategies should prioritize immediate browser updates to version 146.0.7680.153 or later where the stack overflow has been patched. Organizations should implement network-based protections including web application firewalls and content filtering systems that can detect and block malicious WebRTC traffic patterns. Browser hardening measures such as enabling sandboxing, disabling unnecessary WebRTC features, and implementing strict content security policies can reduce exploitation success rates. Regular security assessments should monitor for similar vulnerabilities in other browser components and third-party libraries. System administrators should maintain updated threat intelligence feeds to identify potential exploitation attempts targeting this vulnerability. The ATT&CK framework categorizes this as a technique involving code injection and privilege escalation through browser-based attacks, emphasizing the need for layered defensive measures including endpoint detection and response capabilities to identify and contain exploitation attempts.