CVE-2026-20687
Use-After-Free in Apple OS Kernels Causes System Crash, Memory Corruption
Publication date: 2026-03-25
Last updated on: 2026-03-25
Assigner: Apple Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| apple | macos | From 15.0 (inc) to 15.7.5 (exc) |
| apple | macos | From 26.0 (inc) to 26.4 (exc) |
| apple | ipados | to 18.7.7 (exc) |
| apple | ipados | From 26.0 (inc) to 26.4 (exc) |
| apple | iphone_os | to 18.7.7 (exc) |
| apple | iphone_os | From 26.0 (inc) to 26.4 (exc) |
| apple | tvos | to 26.4 (exc) |
| apple | watchos | to 26.4 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-416 | The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
[{'type': 'paragraph', 'content': "CVE-2026-20687 is a vulnerability in the libxpc component affecting watchOS 26.4 and tvOS 26.4. It allows an app to enumerate a user's installed apps, which can potentially compromise user privacy. The issue was addressed by Apple through improved checks within libxpc to prevent unauthorized app enumeration."}] [1, 2]
How can this vulnerability impact me? :
[{'type': 'paragraph', 'content': "This vulnerability allows an app to enumerate the user's installed apps, potentially compromising user privacy. This means that a malicious app could gather information about other apps installed on the device without authorization."}] [1, 2]
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 provided by Apple.
- Update iOS and iPadOS devices to iOS 18.7.7, iPadOS 18.7.7, iOS 26.4, or iPadOS 26.4.
- Update macOS devices to macOS Sequoia 15.7.5 or macOS Tahoe 26.4.
- Update Apple TV devices to tvOS 26.4.
- Update Apple Watch devices to watchOS 26.4.
These updates include improved checks within the libxpc component to prevent unauthorized app enumeration and address the use after free issue.