CVE-2025-9478: 
vulnerability analysis and mitigation

A critical Use-after-free vulnerability in ANGLE component of Google Chrome (CVE-2025-9478) was discovered prior to version 139.0.7258.154. The vulnerability was reported by Google Big Sleep on August 11, 2025, and publicly disclosed on August 26, 2025. This security flaw affects Google Chrome installations across multiple operating systems including Windows, Linux, and macOS (NVD Database, Chrome Release).

The vulnerability is classified as a Use-after-free (CWE-416) issue specifically affecting the ANGLE (Almost Native Graphics Layer Engine) component in Google Chrome. It received 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, indicating network vector attack capability with low attack complexity, no privileges required, and user interaction needed (NVD Database).

The vulnerability allows remote attackers to potentially exploit heap corruption through a specially crafted HTML page, which could lead to arbitrary code execution. Given the critical severity rating and high CVSS score, successful exploitation could result in complete compromise of the affected system's confidentiality, integrity, and availability (NVD Database).

Google has addressed this vulnerability in Chrome version 139.0.7258.154. Users are strongly advised to update to this version or later to mitigate the risk. The fix was released as part of a stable channel update for desktop (Chrome Release).