CVE-2021-1829 Memory corruption in macOS

What is CVE-2021-1829?

CVE-2021-1829 is a critical memory corruption vulnerability in Apple Macos, published on 8 Sep 2021. 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 state handling. This issue is fixed in macOS Big Sur 11.3. An application may be able to execute arbitrary code with kernel privileges.

Weakness: CWE-843

Which versions are affected by CVE-2021-1829?

It affects 1 product.

Products include Apple Macos.

How do I fix CVE-2021-1829?

No fix has been published for CVE-2021-1829 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-2021-1829 being exploited?

There is no known exploitation of CVE-2021-1829 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-fgc6-r27g-4r9x.