Use-after-free in macOS - CVE-2026-43719
Published: September 15, 2026
Vulnerability identifier: #VU149829
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-43719
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to use-after-free in SMB when handling SMB requests. A remote attacker can send SMB requests to cause a denial of service.
Affected software
macOS
How to mitigate CVE-2026-43719
Install update from vendor's website.
macOS - addressed in versions 26.7 25G229, 15.8 24H23