CVE-2026-95335 in Chrome
Summary
by MITRE • 09/29/2026
Use after free in HID in Google Chrome prior to 154.0.8037.57 allowed a remote attacker who had compromised the renderer process to potentially execute arbitrary code 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 described constitutes a critical use-after-free flaw within the Human Interface Device subsystem of Google Chrome, specifically affecting versions prior to 154.0.8037.57. This memory corruption issue arises when the browser fails to properly manage the lifecycle of objects associated with HID interfaces after they have been deallocated from memory. In modern web browsers like Chrome, security is heavily reliant on process isolation and sandboxing techniques designed to contain malicious code within a restricted environment known as the renderer process. The primary goal of this architecture is to prevent any compromised or untrusted content executed in the renderer from accessing sensitive system resources or executing arbitrary commands with higher privileges. However, when a use-after-free condition occurs, it creates a window where previously freed memory can be accessed and potentially manipulated by an attacker who has already gained control over the renderer process context.
The technical mechanism behind this vulnerability involves the improper handling of pointers to HID-related objects after their associated resources have been released. When a crafted HTML page triggers specific interactions with USB or Bluetooth devices, it may cause the browser to free certain internal structures while retaining references to them in other active data structures. If an attacker can control the content that is subsequently allocated into this freed memory region through further malicious actions within the same renderer process, they can achieve arbitrary read and write capabilities beyond the intended sandbox boundaries. This scenario effectively bypasses the isolation mechanisms provided by Chrome's multi-process architecture, allowing code execution to escape from the low-privilege renderer environment into higher-privileged processes or system-level components.
From an operational impact perspective, this vulnerability poses a severe risk because it enables remote code execution without requiring user interaction beyond visiting a maliciously crafted webpage. An attacker could exploit this flaw by hosting a specially designed HTML page that leverages HID interface interactions to trigger the memory corruption. Once executed outside the sandbox, the injected code can perform actions such as stealing sensitive data, installing malware, or pivoting to attack other systems on the network. The severity is classified as High within the Chromium security framework due to its potential for widespread exploitation and the significant breach of trust inherent in web browsing activities where users expect their system integrity to remain intact despite visiting untrusted sites.
This vulnerability aligns with Common Weakness Enumeration identifier CWE-416, which describes use after free errors resulting from improper memory management practices. Furthermore, it maps to MITRE ATT&CK techniques related to process injection and sandbox escape, specifically those involving exploitation of client-side software vulnerabilities for initial access or privilege escalation within the endpoint environment. The attack vector is classified as remote via network (ATT&CK T1189), leveraging social engineering through deceptive web content to trigger the exploit without direct user intervention beyond navigation.
Mitigation strategies primarily involve updating Google Chrome to version 154.0.8037.57 or later, where these memory management issues have been addressed by developers through rigorous code reviews and automated fuzzing tests that detect such lifecycle mismatches in HID handling routines. Organizations should enforce automatic update policies for all client machines to ensure timely patch deployment against known vulnerabilities of this nature. Additionally, deploying endpoint detection and response solutions with behavioral analysis capabilities can help identify anomalous process injection attempts or sandbox escape behaviors indicative of exploitation activity related to memory corruption flaws like use-after-free conditions in browser processes.