CVE-2026-102313 in Chrome
Summary
by MITRE • 09/29/2026
Uninitialized resource in ANGLE in Google Chrome on on Windows prior to 154.0.8037.92 allowed a remote attacker to read memory outside the sandbox via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 09/29/2026
The vulnerability identified involves an uninitialized resource state within the ANGLE graphics library, which is integrated into Google Chrome on Windows systems prior to version 154.0.8037.92. This flaw represents a critical failure in memory management and initialization protocols during the rendering process. When a remote attacker crafts a malicious HTML page that triggers specific graphical operations within the browser's sandboxed environment, the ANGLE component fails to properly initialize certain internal resources or pointers before they are accessed. This lack of proper initialization leads to undefined behavior where the application may read from memory locations that were not allocated for this purpose or contain stale data from previous processes. The severity is classified as high because it directly compromises the integrity and confidentiality of the system by allowing unauthorized access to sensitive information stored in adjacent memory regions.
From a technical perspective, this issue falls under the category of improper initialization vulnerabilities, commonly referenced in industry standards such as CWE-457: Use of Uninitialized Variable or Resource. The root cause lies in the complex interaction between the browser's rendering engine and the underlying graphics abstraction layer provided by ANGLE. When processing specific WebGL contexts or canvas operations defined in the crafted HTML payload, the software path does not guarantee that all necessary structures are zeroed out or correctly assigned before being utilized for memory reads. Consequently, an attacker can exploit this gap to perform arbitrary read operations outside the confines of the browser's sandbox. This bypasses the isolation mechanisms designed to prevent web content from accessing local system resources, thereby elevating the threat level significantly beyond typical cross-site scripting or injection attacks.
The operational impact of this vulnerability is severe for end-users and organizations relying on Google Chrome as their primary browsing platform. A successful exploitation allows a remote attacker to read arbitrary memory contents, which can include sensitive data such as session cookies, authentication tokens, private keys, or other confidential information stored in the browser's process space. This capability effectively neutralizes the security boundary provided by the sandbox model, enabling potential further attacks such as credential theft, session hijacking, or reconnaissance for more advanced persistent threats. The ability to read memory outside the sandbox also opens avenues for information disclosure that can facilitate subsequent exploitation steps, making this a critical risk vector in modern web-based attack chains.
Mitigation strategies primarily involve immediate software updates to address the underlying code defect. Users and system administrators should upgrade Google Chrome to version 154.0.8037.92 or later, where the initialization logic for ANGLE resources has been corrected to ensure all variables are properly set before use. In environments where patching is not immediately feasible, network-level controls such as web application firewalls can be configured to detect and block requests containing suspicious WebGL payloads or malformed HTML structures that trigger this specific code path. Additionally, enabling strict content security policies and disabling unnecessary browser features like JavaScript execution on untrusted sites can reduce the attack surface available to potential exploiters. Continuous monitoring for anomalous memory access patterns in endpoint detection systems may also provide early warning indicators of exploitation attempts targeting this vulnerability class aligned with ATT&CK techniques related to unauthorized data exfiltration from application processes.