CVE-2021-30844

Name: CVE-2021-30844
Creator: NVD / NIST
Published: 2021-10-19T14:15:09.513+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.74%

Last modified Jun 17, 2026

CVE-2021-30844 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A logic issue was addressed with improved state management. This issue is fixed in Security Update 2021-005 Catalina, macOS Big Sur 11.6. EPSS estimates a 1.74% chance of exploitation in the next 30 days.

Description

A logic issue was addressed with improved state management. This issue is fixed in Security Update 2021-005 Catalina, macOS Big Sur 11.6. A remote attacker may be able to leak memory.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

1.74%

74.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-401

Affected Software

Vendor	Product	Versions
Apple	Mac Os X	>= 10.15, <= 10.15.6
Apple	Mac Os X	10.15.7
Apple	Macos	< 11.6.1

References

https://support.apple.com/en-us/HT212804Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT212805Release Notes, Vendor Advisory
https://support.apple.com/kb/HT212871Vendor Advisory
https://support.apple.com/kb/HT212872Vendor Advisory
https://support.apple.com/en-us/HT212804Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT212805Release Notes, Vendor Advisory
https://support.apple.com/kb/HT212871Vendor Advisory
https://support.apple.com/kb/HT212872Vendor Advisory

Timeline

Published: Oct 19, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-30844?

A logic issue was addressed with improved state management. This issue is fixed in Security Update 2021-005 Catalina, macOS Big Sur 11.6. A remote attacker may be able to leak memory.

How severe is CVE-2021-30844?

CVE-2021-30844 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.74% probability of exploitation in the next 30 days.

How do I fix CVE-2021-30844?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-30844?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST