Memory corruption in macOS - CVE-2026-39873
Published: August 17, 2026
Vulnerability identifier: #VU143776
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-2026-39873
CWE-ID: CWE-119
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 memory corruption in SMB when handling requests. A remote attacker can send a specially crafted request to cause a denial of service.
Affected software
macOS
How to mitigate CVE-2026-39873
Install update from vendor's website.
macOS - addressed in versions 26.6 25G72, 14.8.8 23J620, 15.7.8 24G824