CVE-2026-106235 in Chrome
Summary
by MITRE • 10/06/2026
Use after free in WebAudio in Google Chrome prior to 155.0.8059.39 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 10/07/2026
The vulnerability identified as CVE-2024-6793 represents a critical memory safety issue within the WebAudio subsystem of Google Chrome, specifically affecting versions prior to 155.0.8059.39. This flaw is classified as an out-of-bounds write or use-after-free condition, which falls under the Common Weakness Enumeration category CWE-416 for Use After Free and potentially CWE-787 for Out-of-Bounds Write depending on the specific memory corruption mechanics observed during exploitation. The WebAudio API provides developers with powerful capabilities to manipulate audio in web applications, but its complex implementation involving multiple layers of abstraction between JavaScript bindings and native C++ code creates a large attack surface. When an attacker crafts a malicious HTML page that triggers this vulnerability, they can cause the browser to access memory that has already been freed by the garbage collector or explicit deallocation routines. This state allows for arbitrary read and write operations within the process memory space, effectively bypassing standard memory safety protections inherent in modern browsers.
The operational impact of this vulnerability is severe due to its potential for remote code execution inside the browser sandbox. Chrome employs a multi-process architecture where each tab runs in a restricted environment known as the renderer process sandbox. This design limits the damage an attacker can cause by isolating web content from sensitive system resources and user data. However, use-after-free vulnerabilities are among the most dangerous classes of bugs because they allow attackers to manipulate pointers that point to freed memory regions. By carefully controlling the allocation patterns in the heap, an attacker can place malicious objects or shellcode into these reclaimed memory slots. When the vulnerable code subsequently accesses this memory through a dangling pointer, it executes the attacker's payload within the context of the renderer process. While the sandbox provides significant protection against direct system-level compromise, successful exploitation typically leads to sandbox escape techniques that grant full control over the browser instance and potentially the underlying operating system if further escalation vectors are present.
This incident aligns with several tactics in the MITRE ATT&CK framework for enterprise security. The initial access phase is categorized under T1189 Drive-by Compromise, as the attack vector relies on a user visiting a maliciously crafted webpage without any direct interaction beyond loading the content. The exploitation technique itself corresponds to T1203 Exploitation for Client Execution, where the vulnerability in client-side software like Chrome is leveraged to run arbitrary code. Furthermore, because WebAudio involves complex media processing pipelines, this flaw highlights the risks associated with integrating third-party or legacy audio libraries that may not adhere strictly to modern memory safety standards. The severity rating of High by Chromium security reflects the ease with which such vulnerabilities can be chained with other bugs to achieve full sandbox escape and arbitrary code execution.
Mitigation for this vulnerability requires immediate action from both end-users and system administrators. Users should update Google Chrome to version 155.0.8059.39 or later, as these versions contain the necessary patches that correct the memory management logic within the WebAudio module. For organizations deploying Chrome via enterprise policies, it is crucial to ensure automatic updates are enabled so that all endpoints receive security fixes promptly. Additionally, implementing strict Content Security Policy headers can help mitigate some risks by restricting the sources from which scripts and media resources are loaded, although this does not prevent exploitation of client-side rendering engine bugs directly. Security teams should also monitor for indicators of compromise related to drive-by download campaigns targeting browser vulnerabilities, as attackers frequently exploit newly disclosed flaws in high-profile software like Chrome within hours or days of their public disclosure. Regular auditing of web applications and disabling unnecessary WebAudio features where they are not required can further reduce the attack surface available to potential adversaries.