CVE-2021-1860: 
macOS vulnerability analysis and mitigation

A memory initialization vulnerability (CVE-2021-1860) was discovered in Apple's kernel component, affecting multiple Apple operating systems including iOS 14.5, iPadOS 14.5, watchOS 7.4, tvOS 14.5, macOS Big Sur 11.3, and Security Updates for Catalina and Mojave. The vulnerability was discovered by security researcher @0xalsr and disclosed in April 2021 (Apple Support).

The vulnerability stems from a memory initialization issue in the kernel that was addressed with improved memory handling. The vulnerability received a CVSS v3.1 base score of 6.5 (MEDIUM) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N, and a CVSS v2.0 score of 7.1 (HIGH) (NVD).

When exploited, this vulnerability allows a malicious application to disclose kernel memory, potentially exposing sensitive system information (Apple Support, NVD).

Apple addressed this vulnerability by releasing security updates across multiple platforms: 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 are advised to update their devices to these versions to protect against this vulnerability (Apple Support).