CVE-2026-95324 in Chrome
Summary
by MITRE • 09/29/2026
Uninitialized resource in GPU in Google Chrome prior to 154.0.8037.57 allowed a remote attacker who had compromised the renderer process 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 as an uninitialized resource in the GPU subsystem of Google Chrome prior to version 154.0.8037.57 represents a critical failure in state management within the browser's graphics processing unit interface. This flaw allows for out-of-bounds memory reads, which can lead to information disclosure or potentially further exploitation depending on the specific data accessed and the context of execution. The severity is classified as High by Chromium security standards due to its potential impact on user privacy and system integrity when combined with other attack vectors such as renderer process compromise.
The technical root cause lies in the improper initialization of a resource allocated for GPU operations. In complex software systems like web browsers, resources are frequently allocated dynamically during rendering tasks involving WebGL or hardware-accelerated content. If these allocations fail to properly initialize all fields or memory buffers before being used by subsequent GPU commands, they may contain stale data from previous allocations or uninitialized stack/heap regions. When a crafted HTML page triggers specific graphical operations that interact with this flawed resource path, the browser attempts to read from an invalid or unintended memory location. This behavior constitutes an out-of-bounds read vulnerability where the application accesses memory beyond its intended boundaries without adequate validation checks.
From an operational perspective, this vulnerability requires a pre-condition of renderer process compromise. Typically, Chrome isolates web content in sandboxed renderer processes to limit the impact of exploits. However, if an attacker has already achieved code execution or arbitrary write capabilities within a compromised renderer through another vector such as a separate JavaScript exploit or a different browser bug, they can leverage this GPU uninitialized resource flaw to escape that isolation boundary. By triggering the out-of-bounds read, the attacker can leak sensitive information from the host system memory, including potentially cryptographic keys, session tokens, or other data belonging to privileged processes running outside the sandbox. This effectively breaks the security model of process isolation that is central to modern browser architecture.
This vulnerability aligns with Common Weakness Enumeration (CWE) category CWE-457, which describes Use of Uninitialized Variable. The lack of proper initialization leads to unpredictable behavior and potential data leakage. In terms of attack patterns, this scenario maps closely to MITRE ATT&CK technique T1083, File and Directory Discovery, if the read allows enumeration of system files or structures, or more broadly to privilege escalation techniques where sandbox escape is achieved through memory corruption flaws. The exploitation chain typically involves crafting a malicious webpage that forces specific GPU shader executions or texture operations that trigger the uninitialized state access within the browser's graphics pipeline.
Mitigation strategies primarily involve applying the official patch provided in Google Chrome version 154.0.8037.57 and later releases, which corrects the initialization logic for the affected GPU resources. Organizations should ensure automated update mechanisms are enabled to maintain current versions across all endpoints. For environments where immediate patching is not feasible, network-level controls such as web filtering proxies can be configured to block access to known malicious domains hosting exploit kits that target this specific vulnerability class. Additionally, enabling strict Content Security Policy headers and disabling unnecessary browser features like WebGL or hardware acceleration in high-security contexts can reduce the attack surface available for triggering these GPU-related flaws. Regular security audits focusing on memory safety in C++ codebases used by browsers are also recommended to prevent similar uninitialized variable issues from being introduced in future updates.