Out-of-bounds read in macOS - CVE-2023-40391

Vulnerability identifier: #VU81154

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2023-40391

CWE-ID: CWE-125

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local application to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in GPU Drivers. A local application can trigger an out-of-bounds read error and disclose kernel memory.

macOS
iPadOS
tvOS
Apple iOS
Apple Xcode

Install updates from vendor's website.

macOS - update to 14.0 23A344
Apple Xcode - update to 15.0
iPadOS - update to 17.0
tvOS - update to 17.0
Apple iOS - addressed in versions 17.0 21A326, 17.0 21A327, 17.0 21A329, 17.0 21A331

• https://support.apple.com/en-us/HT213940

• Multiple vulnerabilities in Apple macOS Sonoma
• Multiple vulnerabilities in Apple Xcode
• Multiple vulnerabilities in Apple iOS 17 and iPadOS 17
• Multiple vulnerabilities in Apple tvOS 17