Vulnerability Monitor

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CVE-2021-30900

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 14.8.1 and iPadOS 14.8.1, iOS 15.1 and iPadOS 15.1. A malicious application may be able to execute arbitrary code with kernel privileges.

Published

2021-08-24T19:15:18.083

Last Modified

2025-10-23T18:02:01.700

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 7.8 (HIGH)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:C/I:C/A:C

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

8.6

Impact Score

10.0

Weaknesses

Type: Primary
CWE-787
Type: Secondary
CWE-787

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	apple	ipados	< 14.8.1	Yes
Operating System	apple	ipados	15.0	Yes
Operating System	apple	iphone_os	< 14.8.1	Yes
Operating System	apple	iphone_os	15.0	Yes
Operating System	apple	macos	< 11.6.1	Yes

References

https://support.apple.com/en-us/HT212867 Vendor Advisory ([email protected])
https://support.apple.com/en-us/HT212868 Vendor Advisory ([email protected])
https://support.apple.com/kb/HT212872 Vendor Advisory ([email protected])
https://support.apple.com/en-us/HT212867 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://support.apple.com/en-us/HT212868 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://support.apple.com/kb/HT212872 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30900 US Government Resource (134c704f-9b21-4f2e-91b3-4a467353bcc0)