CVE-2025-6558: 
vulnerability analysis and mitigation

CVE-2025-6558 is a high-severity vulnerability discovered in Google Chrome's ANGLE (Almost Native Graphics Layer Engine) and GPU components. The vulnerability was discovered on June 23, 2025, by Clément Lecigne and Vlad Stolyarov of Google's Threat Analysis Group (TAG) and affects Google Chrome versions prior to 138.0.7204.157. The flaw is characterized as an insufficient validation of untrusted input that could allow a remote attacker to perform a sandbox escape via a crafted HTML page (NVD, Chrome Releases).

The vulnerability has been assigned a CVSS v3.1 base score of 8.8 (High) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. It is classified under CWE-20 (Improper Input Validation). The vulnerability specifically affects the ANGLE component, which serves as a translation layer between Chrome's rendering engine and device-specific graphics drivers, potentially allowing attackers to escape Chrome's sandbox through manipulation of low-level GPU operations (NVD, Hacker News).

The vulnerability's impact is severe as it allows attackers to potentially break out of the browser's security sandbox and interact with the underlying system. For most users, simply visiting a malicious website could be sufficient to trigger a silent compromise without requiring any additional user interaction such as downloads or clicks (Hacker News).

Google has released patches for the vulnerability in Chrome version 138.0.7204.157/.158 for Windows and macOS, and 138.0.7204.157 for Linux. Users are strongly advised to update their browsers immediately. CISA has set a due date of August 12, 2025, for federal agencies to apply the vendor patches or discontinue product use if mitigations are unavailable (Chrome Releases, NVD).