CVE-2021-1841

moderate-risk

Published 2021-09-08

A malicious application may be able to execute arbitrary code with kernel privileges. This issue is fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina. An out-of-bounds write issue was addressed with improved bounds checking.

Do I need to act?

0.20% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 7.8/10 High

LOCAL / LOW complexity

Affected Products (20)

Mac Os X

Affected Vendors

Apple

References (4)

Vendor Advisory https://support.apple.com/en-us/HT212325

Vendor Advisory https://support.apple.com/en-us/HT212326

Vendor Advisory https://support.apple.com/en-us/HT212325

Vendor Advisory https://support.apple.com/en-us/HT212326

/ 100

moderate-risk

Severity 24/34 · High

Exploitability 1/34 · Minimal

Exposure 24/34 · High