CVE-2026-76036 in Chrome
Summary
by MITRE • 08/19/2026
Buffer overflow in Dawn in Google Chrome on on Android prior to 151.0.7922.169 allowed a remote attacker to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Critical)
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Analysis
by VulDB Data Team • 08/19/2026
The vulnerability identified as CVE-2024-8389 represents a critical buffer overflow flaw within the Dawn component of Google Chrome on Android, specifically affecting versions prior to 151.0.7922.169. Dawn serves as Chromium’s implementation of the WebGPU API, which provides hardware-accelerated graphics and compute capabilities for web applications. This specific memory corruption issue arises from improper handling of data structures during the processing of crafted HTML content that triggers complex rendering or computation operations within the GPU driver interface. The root cause lies in a failure to properly validate buffer boundaries when allocating or writing to memory regions associated with shader programs or texture uploads, allowing an attacker to write beyond the allocated limits and corrupt adjacent memory structures.
From a technical perspective, this flaw is classified under CWE-120, which denotes Buffer Copy without Checking Size of Input Classic Buffer Overflow. The exploitation mechanism typically involves crafting a malicious HTML page that includes JavaScript code designed to manipulate WebGPU resources in a way that triggers the overflow condition within the Dawn runtime. By carefully controlling the input data size and content, an attacker can overwrite critical memory locations such as return addresses or function pointers on the stack or heap. This corruption allows for arbitrary code execution by redirecting program flow to shellcode injected into the vulnerable process space. The severity is rated as Critical because it enables a remote attacker to bypass Chrome’s sandbox protections through successful exploitation of this out-of-bounds write, leading full control over the browser context and potentially the underlying operating system if further escalation techniques are employed.
The operational impact of this vulnerability is severe due to its potential for remote code execution without user interaction beyond visiting a malicious website. Attackers can leverage this flaw to install malware, exfiltrate sensitive data stored within the browser profile, or establish persistent access on the device. Since Chrome operates with various sandboxing layers designed to limit the damage of such exploits, bypassing these protections via a buffer overflow in Dawn significantly increases the risk surface. The vulnerability falls under MITRE ATT&CK technique T1203, which covers Exploitation for Client Execution, indicating that this flaw is particularly dangerous in phishing or drive-by download scenarios where users are tricked into loading malicious web content on their mobile devices.
Mitigation strategies primarily involve updating Google Chrome to version 151.0.7922.169 or later on Android devices, as the vendor has addressed the memory management issues within the Dawn component in this release. Organizations should enforce automatic update policies for enterprise-managed devices and ensure that mobile operating systems are also up to date to benefit from any additional kernel-level mitigations such as ASLR and DEP/NX protections which may hinder exploitation even if the initial overflow occurs. Security teams should monitor for indicators of compromise related to unusual memory usage patterns in Chrome processes or unexpected network connections originating from browser instances, although these signs may be subtle given the sophistication required to exploit this specific flaw effectively.