CVE-2026-106290 in Chrome
Summary
by MITRE • 10/06/2026
Uninitialized resource in GPU in Google Chrome on on Android prior to 155.0.8059.39 allowed a remote attacker who had compromised the renderer process to read memory outside the sandbox via a crafted HTML page. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 10/07/2026
The vulnerability identified as an uninitialized resource issue within the Graphics Processing Unit subsystem of Google Chrome on Android represents a significant breach in the browser's isolation mechanisms. This flaw, which was present in versions prior to 155.0.8059.39, stems from improper initialization practices during the handling of GPU-related operations. When the browser processes certain graphical commands or resources, it fails to properly initialize specific memory structures or state variables associated with the GPU context. This oversight creates a window where sensitive data remains in memory without being cleared or overwritten by expected default values, leaving these uninitialized regions accessible for subsequent read operations.
The operational impact of this vulnerability is particularly severe due to its potential for remote exploitation through web-based vectors. An attacker can craft an HTML page that triggers the specific GPU code path containing the flaw. By leveraging JavaScript and WebGL or other graphics APIs exposed by Chrome, the malicious script forces the browser to execute commands that interact with the uninitialized resources. Because the renderer process in Chromium is designed to operate within a strict sandbox to prevent access to host system data, this vulnerability allows an attacker who has already compromised the renderer process via another vector, such as a separate exploit or injection attack, to bypass those restrictions. The lack of proper initialization means that memory contents from other processes or sensitive browser internals can be leaked back through the GPU pipeline, effectively breaking out of the sandbox environment.
From a technical classification perspective, this issue aligns with CWE-457, which describes the use of an uninitialized variable. In the context of modern browsers and operating systems, such flaws are critical because they undermine the principle of least privilege enforced by process isolation models like those used in Chromium's multi-process architecture. The vulnerability also maps to MITRE ATT&CK techniques related to memory disclosure and sandbox escape, specifically falling under categories that involve reading sensitive information from non-volatile storage or using hardware features for data exfiltration. The severity is rated as Medium because while it requires a pre-existing compromise of the renderer process, the ability to read arbitrary memory significantly escalates the risk profile by enabling further lateral movement or extraction of credentials and session tokens stored in browser memory.
Mitigation strategies primarily involve updating Google Chrome on Android to version 155.0.8059.39 or later, where this initialization logic has been corrected to ensure all GPU resources are properly zeroed out before use. For developers and security engineers analyzing similar issues, the remediation involves enforcing strict memory management protocols within graphics drivers and browser rendering engines. This includes implementing rigorous checks for resource state during allocation and ensuring that any buffer or context used in hardware-accelerated operations is explicitly initialized to a known safe state. Additionally, enhancing sandbox boundaries by limiting GPU access permissions can provide an additional layer of defense against exploitation attempts targeting uninitialized memory regions.