CVE-2025-6558 in Chrome
Summary
by MITRE • 07/15/2025
Insufficient validation of untrusted input in ANGLE and GPU in Google Chrome prior to 138.0.7204.157 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 08/26/2025
The vulnerability identified as CVE-2025-6558 represents a critical security flaw in Google Chrome's ANGLE graphics library and GPU subsystem that existed prior to version 138.0.7204.157. This issue stems from insufficient validation of untrusted input within the browser's graphics processing components, creating a pathway for remote attackers to potentially escape the sandbox environment that normally isolates these critical subsystems from the rest of the operating system. The vulnerability operates at the intersection of graphics processing and browser security boundaries, where unvalidated input from malicious web pages can be processed through the GPU and ANGLE components without proper sanitization checks.
The technical flaw manifests when Chrome processes untrusted HTML content that contains crafted graphics commands or data structures that are passed through the ANGLE graphics library to the underlying GPU driver. This processing occurs within the browser's GPU process, which typically operates under strict sandboxing restrictions designed to prevent privilege escalation and system compromise. However, the insufficient input validation allows malicious data to bypass these security controls, potentially enabling attackers to execute arbitrary code with elevated privileges that would normally be restricted by the sandbox mechanism. The vulnerability specifically affects the way Chrome handles graphics-related input from web pages, particularly when these inputs are processed through the GPU acceleration subsystem.
From an operational perspective, this vulnerability poses a significant risk to users browsing the web, as it can be exploited through a simple malicious webpage without requiring any user interaction beyond visiting the site. The remote exploitation capability means that attackers can leverage this vulnerability through phishing campaigns, compromised websites, or malicious advertisements without needing physical access to the target system. Successful exploitation could result in complete system compromise, allowing attackers to install malware, steal sensitive data, or use the compromised system as a launch point for further attacks within a network environment. The Chromium security severity rating of High reflects the potential for privilege escalation and system-level compromise that this vulnerability enables.
The vulnerability aligns with several common weakness enumerations and attack patterns within cybersecurity frameworks, specifically relating to CWE-20 (Improper Input Validation) and CWE-787 (Out-of-bounds Write) as referenced in the CWE database. It also maps to attack techniques described in the MITRE ATT&CK framework under T1059 (Command and Scripting Interpreter) and T1068 (Exploitation for Privilege Escalation) where attackers leverage software vulnerabilities to gain elevated system privileges. Organizations should prioritize immediate patching of affected Chrome versions to mitigate this risk, as the vulnerability exists within core browser functionality that is widely used across enterprise and consumer environments. Additionally, network administrators should consider implementing web filtering solutions and browser hardening measures to reduce the attack surface while waiting for patches to be deployed across all systems.
Mitigation strategies should include immediate deployment of Chrome version 138.0.7204.157 or later, which contains the necessary fixes for this vulnerability. System administrators should also implement additional security controls such as web application firewalls, content filtering solutions, and browser security extensions that can help detect and block malicious web content. Regular security assessments should be conducted to verify that all Chrome installations are properly updated and that no systems remain vulnerable to this or similar graphics-related vulnerabilities. The incident also highlights the importance of maintaining up-to-date security patches for browser components, particularly those that operate with elevated privileges in GPU and graphics processing contexts where security boundaries are most critical.