Vulnerability DatabaseCVE-2025-43255

CVE-2025-43255:
macOS vulnerability analysis and mitigation

Overview

CVE-2025-43255 is a security vulnerability discovered in Apple macOS's GPU drivers, specifically within the AppleIntelKBLGraphics kext. The vulnerability was disclosed and patched on July 29, 2025, affecting multiple versions of macOS including Sequoia, Sonoma, and Ventura. This out-of-bounds read vulnerability was discovered by an anonymous researcher working with Trend Micro's Zero Day Initiative (Apple Support, ZDI).

Technical details

The vulnerability is classified with a CVSS score of 6.5 (AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N). The specific flaw exists within the AppleIntelKBLGraphics kext and results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. The issue was addressed by Apple through improved bounds checking in their security update (ZDI).

Impact

The vulnerability allows local attackers to disclose sensitive information on affected installations of Apple macOS. An attacker can leverage this vulnerability in conjunction with other vulnerabilities to potentially escalate privileges and execute code in the context of the kernel (ZDI).

Mitigation and workarounds

Apple has released security updates to address this vulnerability in macOS Sequoia 15.6, Sonoma 14.7.7, and Ventura 13.7.7. Users are advised to update their systems to the latest version to protect against this vulnerability (Apple Support).