CVE-2026-84567 Memory corruption in macOS

Medium 5.5 Published 14 Sep 2026 Updated 26 Oct 2026

An app can cause unexpected system termination due to memory handling issues in macOS, requiring a system update.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-84567?

CVE-2026-84567 is a medium-severity memory corruption vulnerability in Apple Macos, published on 14 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The issue was addressed with improved memory handling. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to cause unexpected system termination.

Weakness: CWE-416, CWE-787, CWE-119

Which versions are affected by CVE-2026-84567?

It affects 1 product.

Products include Apple Macos.

How do I fix CVE-2026-84567?

No fix has been published for CVE-2026-84567 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-84567 being exploited?

There is no known exploitation of CVE-2026-84567 in the wild and no public exploit code.

All Apple Macos vulnerabilities

Sources

Also known as GHSA-jrr9-c8xm-7f2q.