Use-after-free in macOS - CVE-2021-30886
Published: October 27, 2021
Vulnerability identifier: #VU57735
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-2021-30886
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the macOS kernel. A local user can run a specially crafted program to trigger a use-after-free error and execute arbitrary code with kernel privileges.
Affected software
macOS
watchOS
tvOS
Apple iOS
iPadOS
watchOS
tvOS
Apple iOS
iPadOS
How to mitigate CVE-2021-30886
Install updates from vendor's website.
macOS - update to 12.0.1 21A559
watchOS - update to 8.1 19R570
tvOS - update to 15.1 19J572
Apple iOS - update to 15.1 19B74
iPadOS - addressed in versions 15.1 19B74, 15.1 19B75
watchOS - update to 8.1 19R570
tvOS - update to 15.1 19J572
Apple iOS - update to 15.1 19B74
iPadOS - addressed in versions 15.1 19B74, 15.1 19B75