What’s Vulnerable › Vulnerabilities

CVE-2021-30931

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-08-24 · updated 2026-06-17

Description

A logic issue was addressed with improved validation. This issue is fixed in macOS Monterey 12.0.1, macOS Big Sur 11.6.2, Security Update 2021-008 Catalina. A malicious application may be able to disclose kernel memory.

Affected products

• macOS: from 10.15 through 10.15.7; 10.15.7-security_update_2020, 10.15.7-security_update_2020-001, 10.15.7-security_update_2020-005, 10.15.7-security_update_2020-007, 10.15.7-security_update_2021-001, 10.15.7-security_update_2021-002 (+3)
• Apple macOS: from 11.0 (excl.) before 11.6.2; from 12.0 (excl.) before 12.1 — fixed in 11.6.2, 12.1

How to fix

Upgrade to a fixed version: Apple macOS 11.6.2, 12.1. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/HT212869
• https://support.apple.com/en-us/HT212979
• https://support.apple.com/en-us/HT212981
• https://support.apple.com/en-us/HT212869
• https://support.apple.com/en-us/HT212979
• https://support.apple.com/en-us/HT212981

Get alerted when CVE-2021-30931 or the next vulnerability affects your stack