CVE-2026-76022 in Chrome
Summary
by MITRE • 08/21/2026
Buffer overflow in Network in Google Chrome prior to 151.0.7922.173 allowed a remote attacker to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 08/24/2026
The vulnerability identified as CVE-2024-6895 represents a critical buffer overflow condition within the Network component of Google Chrome, specifically affecting versions prior to 151.0.7922.173. This flaw arises from improper bounds checking during memory allocation or data handling operations associated with network requests and responses processed by the browser engine. In modern web browsers like Chrome, the rendering process is compartmentalized into a sandboxed environment designed to restrict access to system resources and prevent arbitrary code execution in the event of a compromise. However, this specific buffer overflow allows an attacker to corrupt memory structures outside these protective boundaries, effectively breaking out of the renderer sandbox. The severity of this issue is classified as High by Chromium security standards due to its potential for remote code execution without user interaction beyond visiting a maliciously crafted webpage.
From a technical perspective, buffer overflows occur when more data is written to a fixed-length block of memory than it can hold, causing adjacent memory locations to be overwritten with unintended values. In the context of Chrome's network stack, this likely involves parsing complex HTTP headers or handling large binary payloads where input validation fails to ensure that allocated buffers are sufficient for the incoming data size. When an attacker crafts a specific HTML page containing malicious JavaScript and associated network requests, they can trigger this overflow condition. The overwritten memory may contain control flow instructions such as return addresses or function pointers, which, if manipulated correctly by the attacker, allow them to redirect program execution to shellcode injected into the process memory. This mechanism bypasses standard browser security mitigations like Data Execution Prevention and Address Space Layout Randomization because it exploits a logic error in how the network module manages its internal buffers rather than relying solely on low-level system protections.
The operational impact of this vulnerability is severe, as successful exploitation grants an attacker arbitrary code execution privileges within the context of the Chrome process. While modern browsers employ multiple layers of defense including site isolation and sandboxing, escaping the renderer sandbox typically leads to full compromise of the user's session or potentially the underlying operating system depending on the browser version and configuration. An adversary could use this capability to steal sensitive data such as cookies, credentials, and browsing history, install persistent malware, or pivot further into a corporate network if the victim is part of an enterprise environment. The attack vector is classified as remote via the user interface because it requires only that the user visits a malicious website hosted by the attacker. This makes social engineering tactics like phishing emails with links to compromised sites particularly effective vectors for exploitation in real-world scenarios.
To mitigate this risk, organizations and individual users must ensure that Google Chrome is updated to version 151.0.7922.173 or later immediately upon availability. For enterprise environments, enforcing automatic update policies through endpoint management solutions such as Microsoft Endpoint Manager or Jamf ensures rapid patch deployment across all devices. Additionally, deploying browser isolation technologies can provide an additional layer of defense by rendering web content in a cloud-based virtual environment separate from the local machine, thereby neutralizing any attempt to escape the sandbox even if vulnerabilities like this one are present. Security awareness training should also be conducted to educate users about the risks of visiting untrusted websites and clicking on suspicious links, reducing the likelihood of successful social engineering attacks that lead to exploitation of such browser flaws.
This vulnerability aligns with Common Weakness Enumeration identifier CWE-120, which describes buffer copy without checking size limits, a classic category of memory safety errors prevalent in C and C++ based software like Chrome's core components. Furthermore, the attack technique maps to MITRE ATT&CK tactic T1059, specifically subtechnique 007 for command and script interpreters such as JavaScript, which is often used during initial access or execution phases after gaining a foothold in the browser process. Understanding these mappings helps security teams prioritize remediation efforts based on established industry frameworks and threat intelligence models that track how adversaries leverage memory corruption vulnerabilities to achieve their objectives within modern web browsing contexts.