CVE-2026-20621
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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
The issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.5 and iPadOS 18.7.5, iOS 26.3 and iPadOS 26.3, macOS Sequoia 15.7.4, macOS Sonoma 14.8.4, macOS Tahoe 26.3, visionOS 26.3. An app may be able to cause unexpected system termination or corrupt kernel memory.
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Meta Information
Published
2026-02-11
Last Modified
2026-04-02
Generated
2026-06-16
AI Q&A
2026-02-12
EPSS Evaluated
2026-06-15
NVD
CVE-2026-20621
EUVD
EUVD-2026-6229
Affected Vendors & Products
Showing 5 associated CPEs
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
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KEV
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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.
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Executive Summary

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.

Impact Analysis

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.

Compliance Impact

I don't know

Detection Guidance

I don't know

Mitigation Strategies

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
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