CVE-2026-28911 Memory corruption in macOS

Critical 9.8 Published 27 Jul 2026 Updated 28 Jul 2026

A malicious app can corrupt memory in a system process, potentially leading to code execution or privilege escalation on macOS.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-28911?

CVE-2026-28911 is a critical memory corruption vulnerability in Apple Macos, published on 27 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The issue was addressed with improved memory handling. This issue is fixed in macOS Sonoma 14.8.8, macOS Tahoe 26.6. A malicious app may be able to corrupt memory of a system process.

Weakness: CWE-119

Which versions are affected by CVE-2026-28911?

It affects 1 product.

Products include Apple Macos.

How do I fix CVE-2026-28911?

No fix has been published for CVE-2026-28911 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-2026-28911 being exploited?

There is no known exploitation of CVE-2026-28911 in the wild and no public exploit code.

All Apple Macos vulnerabilities

Sources

Also known as GHSA-3628-553v-4wcf.