CVE-2023-42856 Memory corruption in macOS

What is CVE-2023-42856?

CVE-2023-42856 is a high-severity memory corruption vulnerability in Apple Macos, published on 25 Oct 2023. 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

The issue was addressed with improved memory handling. This issue is fixed in macOS Sonoma 14.1, macOS Monterey 12.7.1, macOS Ventura 13.6.1. Processing a file may lead to unexpected app termination or arbitrary code execution.

Weakness: CWE-119

Which versions are affected by CVE-2023-42856?

It affects 1 product.

Products include Apple Macos.

How do I fix CVE-2023-42856?

No fix has been published for CVE-2023-42856 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-2023-42856 being exploited?

There is no known exploitation of CVE-2023-42856 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-x9v9-7hfr-q9g4.