CVE-2026-19167 in Chrome
Summary
by MITRE • 08/07/2026
Integer overflow in GPU in Google Chrome prior to 151.0.7922.109 allowed a remote attacker who had compromised the renderer process to leak cross-origin data via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 08/07/2026
This vulnerability represents a critical integer overflow flaw within the graphics processing unit implementation of google chrome browsers prior to version 151.0.7922.109. The issue stems from improper handling of integer values during gpu memory operations, creating a condition where arithmetic overflow can occur when processing large numerical values in graphics rendering contexts. The vulnerability specifically affects the renderer process component of chrome, which handles web page content execution and graphics processing. When an attacker successfully compromises this renderer process through separate means such as a cross-site scripting attack or other exploitation techniques, they can leverage this integer overflow to manipulate memory boundaries and potentially access data from different origins. The chromium security severity classification of high reflects the significant risk posed by this vulnerability, as it enables cross-origin data leakage that could expose sensitive information from other websites or domains.
The technical implementation of this flaw occurs within the gpu memory management subsystem where integer values representing buffer sizes or memory offsets are processed without adequate overflow checking mechanisms. When malicious javascript code or html content triggers specific graphics operations with crafted large integers, the arithmetic overflow can result in memory corruption that allows unauthorized data access patterns. This type of vulnerability maps directly to common weakness enumeration cwes 190 and 682 which specifically address integer overflow conditions and incorrect arithmetic operations respectively. The attack vector requires an initial compromise of the renderer process, aligning with attack technique t1059 in the attack framework where adversaries use legitimate system tools for execution. Once the renderer is compromised, the attacker can construct specific html pages that when processed by the browser trigger the integer overflow condition, leading to memory layout manipulation.
The operational impact of this vulnerability extends beyond simple data leakage as it enables sophisticated cross-origin information disclosure attacks that could compromise user privacy and web application security. An attacker who gains control of the renderer process through other means can use this flaw to extract sensitive cookies, session tokens, or other cross-origin resources that should normally be protected by browser security policies. The vulnerability essentially undermines the same-origin policy enforcement mechanisms that form the foundation of web security models, allowing unauthorized access to data from different domains within the same browser instance. This creates a significant risk for users accessing multiple websites simultaneously, as information from one site could potentially be accessed by another through this memory corruption exploit.
Mitigation strategies for this vulnerability require both immediate patching and operational security improvements. The primary solution involves updating chrome browsers to version 151.0.7922.109 or later where the integer overflow conditions have been corrected through proper input validation and boundary checking in gpu memory operations. Organizations should implement automated update mechanisms to ensure all browser instances are promptly patched. Additionally, security teams should monitor for signs of renderer process compromise through behavioral analysis and intrusion detection systems, as this vulnerability requires initial access to the renderer component. Network-level protections such as content security policies and strict isolation measures can help reduce the attack surface, while regular security assessments should focus on identifying potential renderer compromise vectors. The fix addresses the underlying integer overflow conditions through proper validation of memory allocation parameters and enhanced boundary checking in graphics processing operations, aligning with security best practices for preventing arithmetic overflow vulnerabilities in system components.