CVE-2024-40803 Memory corruption in macOS

What is CVE-2024-40803?

CVE-2024-40803 is a high-severity memory corruption vulnerability in Apple Macos, published on 29 Jul 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A type confusion issue was addressed with improved checks. This issue is fixed in macOS Monterey 12.7.6, macOS Sonoma 14.6, macOS Ventura 13.6.8. An attacker may be able to cause unexpected app termination.

Weakness: CWE-843

Which versions are affected by CVE-2024-40803?

It affects 1 product.

Products include Apple Macos.

How do I fix CVE-2024-40803?

No fix has been published for CVE-2024-40803 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-2024-40803 being exploited?

There is no known exploitation of CVE-2024-40803 in the wild and no public exploit code.

Other vulnerabilities in Apple Macos

• CVE-2026-65400 Apple macOS Improper Authentication Exploited Critical 9.8
• CVE-2024-44146 Security feature bypass in macOS Critical 10.0
• CVE-2024-44148 Security feature bypass in macOS Critical 10.0
• CVE-2023-38586 Security feature bypass in macOS Critical 10.0
• CVE-2023-40455 Security feature bypass in macOS Critical 10.0

All Apple Macos vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-fmmj-2f3w-98j5.