CVE-2021-30900
KEVApple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability
Description
Apple GPU drivers, included in iOS, iPadOS, and macOS, contain an out-of-bounds write vulnerability that may allow a malicious application to execute code with kernel privileges.
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.
CVSS 3.1 vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HPublishedAug 24, 2021
Last modifiedJun 17, 2026
Added to KEVMar 30, 2023
Remediation dueApr 20, 2023
References
- support.apple.com/en-us/HT212867Vendor Advisory
- support.apple.com/en-us/HT212868Vendor Advisory
- support.apple.com/kb/HT212872Vendor Advisory
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30900US Government Resource
0 recent articles mention this CVE
70
Risk assessment · High
Actively exploited. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 1287 days
- CVSS
- 7.8 HIGH
- EPSS (30-day exploit probability)
- 5.2% · top 8% of all CVEs
- Weakness
- CWE-787
Recommended actions
- 1.Apply updates per vendor instructions.
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.