CVE-2021-30838

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-10-19 · updated 2026-06-17

Description

A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 15 and iPadOS 15. A malicious application may be able to execute arbitrary code with system privileges on devices with an Apple Neural Engine.

Affected products

Apple iPadOS: before 14.8 — fixed in 14.8
Apple Iphone Os: before 14.8 — fixed in 14.8
Apple macOS: from 11.0 before 11.6 — fixed in 11.6

How to fix

Upgrade to a fixed version: Apple iPadOS 14.8; Apple Iphone Os 14.8; Apple macOS 11.6. Check the vendor advisory for mitigations.

References

http://seclists.org/fulldisclosure/2021/Oct/61
https://support.apple.com/en-us/HT212814
https://support.apple.com/kb/HT212804
https://support.apple.com/kb/HT212807
http://seclists.org/fulldisclosure/2021/Oct/61
https://support.apple.com/en-us/HT212814
https://support.apple.com/kb/HT212804
https://support.apple.com/kb/HT212807

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