CVE-2021-30857
A race condition was addressed with improved locking. This issue is fixed in Security Update 2021-005 Catalina, iOS 14.8 and iPadOS 14.8, tvOS 15, iOS 15 and iPadOS 15, watchOS 8, macOS Big Sur 11.6. A malicious application may be able to execute arbitrary code with kernel privileges.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
A race condition was addressed with improved locking. This issue is fixed in Security Update 2021-005 Catalina, iOS 14.8 and iPadOS 14.8, tvOS 15, iOS 15 and iPadOS 15, watchOS 8, macOS Big Sur 11.6. A malicious application may be able to execute arbitrary code with kernel privileges.
- Record
CVE-2021-30857- CVSS 3.1
- 7.0 High
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.6 High
AV:N/AC:H/Au:N/C:C/I:C/A:C - Weakness
- CWE-362
- Updated
- 2026-11-02
CVE List No score
A race condition was addressed with improved locking. This issue is fixed in Security Update 2021-005 Catalina, iOS 14.8 and iPadOS 14.8, tvOS 15, iOS 15 and iPadOS 15, watchOS 8, macOS Big Sur 11.6. A malicious application may be able to execute arbitrary code with kernel privileges.
- Record
CVE-2021-30857- Updated
- 2026-11-02
EUVDEUVD-2021-17774 No score
A race condition was addressed with improved locking. This issue is fixed in Security Update 2021-005 Catalina, iOS 14.8 and iPadOS 14.8, tvOS 15, iOS 15 and iPadOS 15, watchOS 8, macOS Big Sur 11.6. A malicious application may be able to execute arbitrary code with kernel privileges.
- Record
EUVD-2021-17774- Updated
- 2026-11-03
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-30857 is a high vulnerability (CVSS 7.0) in Apple Ipados, published August 24, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.92%, the 60th percentile. No source names a fixed version.