CVE-2026-84565 Memory corruption in macOS

High 7.1 Published 14 Sep 2026 Updated 26 Oct 2026

An out-of-bounds read in macOS allows attackers to cause unexpected app termination via a maliciously crafted disk image.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-84565?

CVE-2026-84565 is a high-severity memory corruption vulnerability in Apple Macos, published on 14 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. Processing a maliciously crafted disk image may lead to unexpected app termination.

Weakness: CWE-125

Which versions are affected by CVE-2026-84565?

It affects 1 product.

Products include Apple Macos.

How do I fix CVE-2026-84565?

No fix has been published for CVE-2026-84565 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-2026-84565 being exploited?

There is no known exploitation of CVE-2026-84565 in the wild and no public exploit code.

All Apple Macos vulnerabilities

Sources

Also known as GHSA-hrf7-5rq7-gq9x.