CVE-2021-30652: 
macOS vulnerability analysis and mitigation

CVE-2021-30652 is a race condition vulnerability discovered in Apple's libxpc component that was fixed in April 2021. The vulnerability affects multiple Apple operating systems including iOS 14.5, iPadOS 14.5, watchOS 7.4, tvOS 14.5, macOS Big Sur 11.3, Security Update 2021-002 Catalina, and Security Update 2021-003 Mojave. The vulnerability was discovered by James Hutchins (Apple Advisory).

The vulnerability is a race condition in libxpc that was addressed with additional validation. The issue has a CVSS v3.1 base score of 7.0 (HIGH) with the following vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H. The vulnerability is classified as CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization (NVD).

If exploited, this vulnerability could allow a malicious application to gain root privileges on the affected system (Apple Advisory).

Apple addressed this vulnerability by implementing additional validation in the following security updates: iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5, macOS Big Sur 11.3, Security Update 2021-002 Catalina, and Security Update 2021-003 Mojave. Users should update their devices to these versions or later to mitigate the vulnerability (Apple Advisory).