CVE-2026-19149 in Chrome
Summary
by MITRE • 08/07/2026
Use after free in Aura in Google Chrome on Linux prior to 151.0.7922.109 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)
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Analysis
by VulDB Data Team • 08/07/2026
This vulnerability represents a critical use-after-free condition in the Aura windowing system component of Google Chrome on Linux platforms. The flaw exists within the memory management handling of graphical user interface elements, specifically affecting how the system manages object lifecycles during window rendering operations. When processing maliciously crafted HTML content, an attacker can manipulate the timing and execution flow to cause a freed memory region to be accessed after it has been deallocated, creating potential for arbitrary code execution within the browser's security boundaries.
The technical implementation of this vulnerability stems from improper reference counting or object lifecycle management within Aura's window handling subsystem. When Chrome processes HTML elements that trigger specific rendering paths, the system fails to properly validate that objects remain allocated during subsequent operations. This condition allows a remote attacker to craft a webpage containing malicious JavaScript or HTML constructs that force the browser into a state where freed memory can be reused and accessed, potentially enabling code execution with the privileges of the browser process.
The operational impact of this vulnerability extends beyond simple privilege escalation as it specifically targets the sandbox escape mechanism that separates browser processes from the underlying operating system. The attack vector relies on delivering a malicious HTML page through standard web browsing channels, making it particularly dangerous for widespread exploitation. Successful exploitation could allow an attacker to bypass Chrome's sandbox protection, potentially gaining access to system resources and executing arbitrary commands with elevated privileges. This represents a severe threat to user security as it undermines fundamental browser security models that isolate web content from system-level operations.
Mitigation strategies should prioritize immediate patch deployment to versions 151.0.7922.109 and later, which contain the necessary fixes for the memory management issues within Aura's windowing system. Organizations should implement network-based protections such as web application firewalls that can detect and block suspicious HTML content patterns associated with known exploitation techniques. Additionally, browser hardening measures including disabling unnecessary JavaScript features, implementing strict content security policies, and maintaining updated browser versions will reduce the attack surface. The vulnerability aligns with CWE-416 which describes use-after-free errors in software systems, while also mapping to ATT&CK technique T1059.007 for script-based execution and T1548.002 for privilege escalation through sandbox bypass mechanisms. Continuous monitoring of browser security updates and implementation of automated patch management systems will provide additional defense layers against similar future vulnerabilities in the Chrome rendering pipeline.