Use-after-free in macOS - CVE-2021-30927

Vulnerability identifier: #VU58863

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-30927

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error in the OS kernel subsystem. A local user can run a specially crafted program to trigger a use-after-free error and execute arbitrary code with kernel privileges.

macOS
watchOS
tvOS
Apple iOS
iPadOS

Install updates from vendor's website.

macOS - addressed in versions 12.1 21C52, 10.15.7 19H1615, 11.6.2 20G314
watchOS - update to 8.3 19S55
tvOS - update to 15.2 19K53
Apple iOS - addressed in versions 15.2 19C56, 15.2 19C57
iPadOS - update to 15.2 19C56

• https://support.apple.com/en-us/HT212978

• Multiple vulnerabilities in macOS Monterey
• Multiple vulnerabilities in macOS Big Sur
• Multiple vulnerabilities in Apple macOS Catalina
• Multiple vulnerabilities in Apple iOS 15 and iPadOS 15
• Multiple vulnerabilities in Apple tvOS
• Multiple vulnerabilities in Apple watchOS