Use after free in macOS - CVE-2026-43668

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Main Vulnerability Database Vulnerabilities #VU131048

Use after free in macOS - CVE-2026-43668

Published: May 12, 2026


Vulnerability identifier: #VU131048
CSH Severity: Medium
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-43668
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to a use-after-free error in mDNSResponder. A remote attacker can trick the victim into opening a specially crafted file and cause unexpected system termination or corrupt kernel memory.


Affected software

macOS
iPadOS
Apple iOS
tvOS
visionOS
watchOS

How to mitigate CVE-2026-43668

Install update from vendor's website.

macOS - addressed in versions 26.5 25F71, 14.8.7 23J520, 15.7.7 24G720
iPadOS - addressed in versions 18.7.9 22H355, 26.5 23F77
Apple iOS - addressed in versions 18.7.9 22H355, 26.5 23F77
tvOS - update to 26.5 23L471
visionOS - update to 26.5
watchOS - update to 26.5 23T570

External References

Related Security Bulletins