CVE-2021-30656
An access issue was addressed with improved memory management. This issue is fixed in iOS 14.5...
An access issue was addressed with improved memory management. This issue is fixed in iOS 14.5 and iPadOS 14.5. A malicious application may be able to determine kernel memory layout.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
An access issue was addressed with improved memory management. This issue is fixed in iOS 14.5 and iPadOS 14.5. A malicious application may be able to determine kernel memory layout.
- Record
CVE-2021-30656- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N - CVSS 2.0
- 7.1 High
AV:N/AC:M/Au:N/C:C/I:N/A:N - Updated
- 2026-11-02
CVE ListNo score
An access issue was addressed with improved memory management. This issue is fixed in iOS 14.5 and iPadOS 14.5. A malicious application may be able to determine kernel memory layout.
- Record
CVE-2021-30656- Updated
- 2026-11-02
EUVDEUVD-2021-17573No score
An access issue was addressed with improved memory management. This issue is fixed in iOS 14.5 and iPadOS 14.5. A malicious application may be able to determine kernel memory layout.
- Record
EUVD-2021-17573- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-vcx9-823v-p52v
An access issue was addressed with improved memory management. This issue is fixed in iOS 14.5...
An access issue was addressed with improved memory management. This issue is fixed in iOS 14.5 and iPadOS 14.5. A malicious application may be able to determine kernel memory layout.
- Record
GHSA-vcx9-823v-p52v- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N - Weakness
- CWE-668
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-30656 is a medium vulnerability (CVSS 5.5) in Apple Ipados, published September 8, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.86%, the 59th percentile. No source names a fixed version.