Use-after-free in macOS - CVE-2026-43686

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Main Vulnerability Database Vulnerabilities #VU149853

Use-after-free in macOS - CVE-2026-43686

Published: September 15, 2026


Vulnerability identifier: #VU149853
CSH Severity: High
CVSS v4: 8.5 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-43686
CWE-ID: CWE-416
Exploitation vector: Adjecent network
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in OS kernel when handling responses from an NFS server. A remote attacker can trick the victim into connecting to a malicious NFS server, trigger a use-after-free error and execute arbitrary code on the system.



Affected software

macOS
Apple iOS
iPadOS
tvOS
watchOS
visionOS

How to mitigate CVE-2026-43686

Install updates from vendor's website.

macOS - addressed in versions 26.7 25G229, 15.8 24H23, 27.0 26A428
Apple iOS - addressed in versions 26.7 23H24, 27.0 24A427, 27.0 24A437
iPadOS - addressed in versions 26.7 23H24, 27.0 24A437
tvOS - update to 27.0 24J361
watchOS - update to 27.0 24R364
visionOS - update to 27.0

External References

Related Security Bulletins