CVE-2026-113131 in Chrome
Summary
by MITRE • 10/21/2026
Memory corruption in Bluetooth in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 10/21/2026
The vulnerability identified involves a critical memory corruption flaw within the Bluetooth subsystem of Google Chrome, specifically affecting versions prior to 156.0.8078.47. This defect represents a significant breach in the browser's internal data handling mechanisms, where improper management of memory allocation or bounds checking allows for unauthorized access and modification of system resources. The root cause lies in how the Bluetooth stack processes incoming data structures from remote devices or web-based APIs that interface with local hardware adapters. When an attacker crafts a malicious HTML page containing specially designed JavaScript calls to these interfaces, they can trigger an overflow or use-after-free condition within the browser's sandboxed environment. This type of memory corruption is particularly dangerous because it bypasses standard safety checks, allowing data intended for legitimate Bluetooth operations to overwrite adjacent memory regions that may contain executable code or control flow pointers.
From a technical perspective, this flaw aligns with Common Weakness Enumeration categories such as CWE-120 Buffer Overflow and potentially CWE-416 Use After Free, depending on the specific mechanism exploited within the Chromium engine. The vulnerability is classified under ATT&CK technique T1203 Exploitation for Client Execution, as it leverages a client-side application to achieve code execution. By embedding malicious scripts in an HTML page, an attacker can lure a victim into visiting a compromised site or clicking on a phishing link that hosts the exploit payload. Once loaded, the script interacts with the Chrome Bluetooth API, sending malformed data packets that trigger the memory corruption bug. Because this occurs within the browser's sandbox, which is designed to isolate web content from the underlying operating system, successful exploitation requires chaining additional vulnerabilities or leveraging specific conditions where the sandbox boundaries are effectively bypassed through the corrupted state of internal objects.
The operational impact of this vulnerability is severe, as it enables a remote attacker to execute arbitrary code on the victim's machine with the privileges of the browser process. Although Chrome employs robust sandboxing techniques such as site isolation and restricted permissions, memory corruption bugs often provide the necessary foothold for attackers to escape these constraints through privilege escalation or direct system calls if the exploit is sufficiently sophisticated. This could lead to full device compromise, allowing the attacker to install malware, exfiltrate sensitive data stored locally by the browser, monitor user activity, or use the infected machine as part of a botnet. The medium severity rating assigned by Chromium reflects the complexity required for exploitation and the availability of mitigations like sandboxing, but it does not diminish the potential risk given that many modern exploits rely on chaining multiple vulnerabilities to achieve full control over the target system.
Mitigation strategies primarily involve immediate software updates to ensure users are running version 156.0.8078.47 or later of Google Chrome, where these memory management issues have been patched and validated through rigorous testing. Organizations should enforce automated update policies for all endpoints using this browser to minimize the window of exposure. Additionally, security teams can implement network-level controls such as web filtering proxies that block access to known malicious domains hosting exploit kits. User education remains critical; employees and users must be trained to recognize phishing attempts and avoid visiting untrusted websites or clicking on suspicious links that may trigger drive-by download attacks. For high-security environments, deploying application whitelisting solutions can prevent the execution of unauthorized scripts within the browser context, adding an extra layer of defense against client-side exploitation techniques targeting memory corruption flaws in web applications.