CVE-2025-43255: 
macOS vulnerability analysis and mitigation

CVE-2025-43255 is an out-of-bounds read vulnerability affecting Apple's macOS operating system that was disclosed on August 28, 2025. The vulnerability impacts multiple versions of macOS including Sonoma 14.7.7, Sequoia 15.6, and Ventura 13.7.7. This security flaw was discovered by an anonymous researcher working with Trend Micro Zero Day Initiative (Apple Support, NVD).

The vulnerability is classified as an out-of-bounds read issue in the GPU Drivers component of macOS. The flaw has been assigned a CVSS v3.1 base score of 3.3 (LOW) with the vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L. The vulnerability requires local access and low privileges to exploit, with no user interaction needed (CISA-ADP).

When exploited, this vulnerability allows a malicious application to cause unexpected system termination, potentially leading to a denial of service condition. The impact is limited to system availability, with no direct effect on confidentiality or integrity (Apple Support).

Apple has addressed this vulnerability by implementing improved bounds checking in the affected GPU Drivers component. Users are advised to update to macOS Sonoma 14.7.7, macOS Sequoia 15.6, or macOS Ventura 13.7.7, depending on their version (Apple Support).