Use after free in macOS - CVE-2026-20637

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU124407

Use after free in macOS - CVE-2026-20637

Published: March 25, 2026


Vulnerability identifier: #VU124407
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-20637
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local application to perform a denial of service (DoS) attack.

The vulnerability exists due to a use-after-free error in AppleKeyStore. A local application can cause unexpected system termination.


Affected software

macOS
visionOS
watchOS
tvOS
Apple iOS
iPadOS

How to mitigate CVE-2026-20637

Install update from vendor's website.

macOS - addressed in versions 15.7.5 24G624, 14.8.5 23J423, 26.3 25D125
visionOS - update to 26.3
watchOS - update to 26.3 23S620
tvOS - update to 26.3 23K620
Apple iOS - addressed in versions 18.7.7 22H333, 26.3 23D127
iPadOS - addressed in versions 18.7.7 22H333, 26.3 23D127

External References

Related Security Bulletins