Improper input validation in macOS - CVE-2026-84558
Published: September 15, 2026
Vulnerability identifier: #VU149890
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-84558
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to an unspecified flaw in the kernel when a local application interacts with the kernel. A local user can use a local application to cause a denial of service.
Affected software
macOS
How to mitigate CVE-2026-84558
Install update from vendor's website.
macOS - update to 27.0 26A428