CVE-2020-27921 Race condition in macOS

What is CVE-2020-27921?

CVE-2020-27921 is a high-severity vulnerability in Apple Mac Os X, published on 2 Apr 2021. 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

A race condition was addressed with improved state handling. This issue is fixed in macOS Big Sur 11.1, Security Update 2020-001 Catalina, Security Update 2020-007 Mojave, macOS Big Sur 11.0.1. An application may be able to execute arbitrary code with kernel privileges.

Weakness: CWE-362

Which versions are affected by CVE-2020-27921?

It affects 1 product.

Products include Apple Mac Os X.

How do I fix CVE-2020-27921?

No fix has been published for CVE-2020-27921 yet. Limit exposure of the affected software until one is available.

Is CVE-2020-27921 being exploited?

There is no known exploitation of CVE-2020-27921 in the wild and no public exploit code.

Other vulnerabilities in Apple Mac Os X

• CVE-2014-7169 GNU Bourne-Again Shell (Bash) Arbitrary Code Execution Exploited Critical 9.8
• CVE-2014-6271 GNU Bourne-Again Shell (Bash) Arbitrary Code Execution Exploited Critical 9.8
• CVE-2012-1823 PHP-CGI Query String Parameter Exploited Critical 9.8
• CVE-2021-30713 Apple macOS Unspecified Exploited High 7.8
• CVE-2019-8526 Apple macOS Use-After-Free Exploited High 7.8

All Apple Mac Os X vulnerabilities

Sources

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

Also known as GHSA-9853-89f8-q3cw.