A local user may be able to cause unexpected system termination or read kernel memory. This issue is fixed in macOS Big Sur 11.4, Security Update 2021-003 Catalina. An out-of-bounds read issue was addressed by removing the vulnerable code.
https://support.apple.com/en-us/HT212530
https://support.apple.com/en-us/HT212529
Source: Mitre, NVD
Published: 2021-09-08
Updated: 2021-09-16
Base Score: 6.6
Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:N/A:C
Severity: Medium
Base Score: 7.1
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Severity: High