CVE-2026-102311 in Chrome
Summary
by MITRE • 09/29/2026
Uninitialized resource in GPU in Google Chrome on on Android prior to 154.0.8037.92 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 issue within the GPU subsystem of Google Chrome on Android represents a significant breach in browser isolation mechanisms, specifically affecting versions prior to 154.0.8037.92. This flaw resides deep within the graphics processing unit command streamer and shader compiler components that handle hardware-accelerated rendering operations. When the browser processes complex web content involving WebGL or other GPU-intensive APIs, it allocates memory buffers for storing intermediate rendering states and texture data. The core technical deficiency lies in the failure to properly initialize these allocated memory regions before they are populated with user-controlled input from a malicious HTML page. Consequently, when the renderer process attempts to read from these uninitialized segments during subsequent graphics operations, it accesses arbitrary locations in the host system's physical or virtual memory that were not intended for public access.
From an operational perspective, this vulnerability allows a remote attacker who has already compromised the renderer process sandbox to escalate privileges and escape the browser's security boundaries. The primary mechanism of exploitation involves crafting a malicious webpage that triggers specific GPU shader compilation paths where the uninitialized buffer is read rather than written. Because the memory contents are not zeroed out or explicitly set, they may contain sensitive data from previous operations, such as credentials stored in other tabs, session tokens, or cryptographic keys held by the browser process. This constitutes an arbitrary read primitive that bypasses the sandboxing protections designed to isolate untrusted web content from the rest of the operating system and user data. The severity is classified as high due to the potential for complete information disclosure and the ease with which a remote attacker can trigger this condition through standard web technologies without requiring any additional user interaction beyond visiting the crafted page.
This vulnerability aligns closely with Common Weakness Enumeration identifier CWE-457, which describes the use of an uninitialized variable or resource that leads to unpredictable behavior or security breaches. In the context of modern browser architecture, it also relates to CWE-120, specifically buffer over-read scenarios where memory boundaries are not strictly enforced during GPU command execution. Furthermore, from a threat modeling perspective using the MITRE ATT&CK framework, this exploit technique falls under Tactic TA0005 Defense Evasion and Technique T1614 Subsystem Information Discovery, as it enables an attacker to probe system memory for valuable intelligence while evading standard sandbox constraints. The attack vector is classified as remote with low complexity, requiring only a victim to load the malicious content into the browser context on Android devices running affected versions of Chrome.
Mitigation strategies primarily involve updating Google Chrome to version 154.0.8037.92 or later, where the developers have implemented proper initialization routines for GPU memory buffers and enhanced bounds checking within the graphics pipeline. For organizations managing enterprise deployments, enforcing automatic update policies is critical to ensure all endpoints are protected against this specific renderer escape vector. Additionally, security teams should monitor for anomalous network traffic originating from browser processes that may indicate successful exploitation attempts, although detection at runtime remains challenging due to the stealthy nature of memory reads. Implementing strict content security policies and disabling unnecessary WebGL or GPU acceleration features in high-security environments can further reduce the attack surface by limiting the functionality available to malicious scripts attempting to leverage this uninitialized resource flaw.