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
How to mitigate CVE-2026-43686
Install updates from vendor's website.
macOS - addressed in versions 26.7 25G229, 15.8 24H23