CVE-2026-20621
Kernel Memory Corruption via Improper Memory Handling in Apple OS
Publication date: 2026-02-11
Last updated on: 2026-04-02
Assigner: Apple Inc.
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| apple | ipados | to 26.3 (exc) |
| apple | iphone_os | to 26.3 (exc) |
| apple | macos | to 14.8.4 (exc) |
| apple | macos | From 15.0 (inc) to 15.7.4 (exc) |
| apple | macos | From 26.0 (inc) to 26.3 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-119 | The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability involves improper memory handling in certain Apple operating systems. Specifically, an application may exploit this flaw to cause unexpected system termination or corrupt kernel memory.
How can this vulnerability impact me? :
The impact of this vulnerability includes the potential for an application to cause your system to unexpectedly terminate or to corrupt the kernel memory, which could lead to system instability or crashes.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, you should update your Apple devices to the fixed versions of the operating systems.
- macOS Tahoe 26.3
- macOS Sonoma 14.8.4
- macOS Sequoia 15.7.4
- iOS 18.7.5 and iPadOS 18.7.5
- visionOS 26.3
- iOS 26.3 and iPadOS 26.3