CVE-2021-30883
KEVHIGH 9.3EPSS 14.7%
A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 15.0.2 and iPadOS 15.0.2, macOS Monterey 12.0.1, iOS 14.8.1 and iPadOS 14.8.1, tvOS 15.1, watchOS 8.1, macOS Big Sur 11.6.1. An application may be able to execute arbitrary code with kernel privileges. Apple is aware of a report that this issue may have been actively exploited..
- CVSS v3.1
- 7.8 HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - CVSS v3.1
- 7.8 HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - CVSS v2.0
- 9.3 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C - EPSS
- 14.72% chance of exploitation in the next 30 days, 96th percentile
- CISA KEV
- added 2022-05-23
- Published
- 2021-08-24
- Updated
- 2025-10-21
Proof-of-concept exploits (3)
- nanerasingh/IOMFB_integer_overflow_poc0★ · 2021-10-15
- nanerasingh/IOMFB_integer_overflow_poc10★ · 2021-10-27
- saaramar/IOMFB_integer_overflow_poc150★ · 2021-10-11