What’s Vulnerable › Vulnerabilities

CVE-2021-30899

• Severity: high (CVSS 7.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-08-24 · updated 2026-06-17
• Weakness: CWE-362

Description

A race condition was addressed with improved state handling. This issue is fixed in macOS Monterey 12.0.1, Security Update 2021-007 Catalina, macOS Big Sur 11.6.1. A malicious application may be able to execute arbitrary code with kernel privileges.

Affected products

• macOS: before 10.15.7; 10.15.7, 10.15.7-security_update_2020-001, 10.15.7-security_update_2021-001, 10.15.7-security_update_2021-002, 10.15.7-security_update_2021-003, 10.15.7-security_update_2021-004 (+3) — fixed in 10.15.7
• Apple macOS: from 11.0 before 11.6.1; 12.0 — fixed in 11.6.1

How to fix

Upgrade to a fixed version: macOS 10.15.7; Apple macOS 11.6.1. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/HT212869
• https://support.apple.com/en-us/HT212871
• https://support.apple.com/en-us/HT212872
• https://support.apple.com/en-us/HT212869
• https://support.apple.com/en-us/HT212871
• https://support.apple.com/en-us/HT212872

Get alerted when CVE-2021-30899 or the next vulnerability affects your stack