CVE-2026-43809
Analyzed Analyzed - Analysis Complete

Out-of-Bounds Read in macOS

Publication date: 2026-07-27

Last updated on: 2026-07-28

Assigner: Apple Inc.

Description
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. An app may be able to cause unexpected system termination.

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Meta Information

Published
2026-07-27
Last Modified
2026-07-28
Generated
2026-08-17
AI Q&A
2026-07-28
EPSS Evaluated
2026-08-15
NVD
CVE-2026-43809
EUVD
EUVD-2026-49450

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
apple macos From 14.0 (inc) to 14.8.8 (exc)
apple macos From 15.0 (inc) to 15.7.8 (exc)
apple macos From 26.0 (inc) to 26.6 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-125 The product reads data past the end, or before the beginning, of the intended buffer.

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Executive Summary

This is an out-of-bounds read vulnerability caused by insufficient bounds checking. An application could access memory outside intended boundaries, potentially leading to system crashes or unexpected behavior.

Detection Guidance

This CVE describes an out-of-bounds read issue in Apple macOS versions prior to Sequoia 15.7.8, Sonoma 14.8.8, and Tahoe 26.6. Detection requires checking your macOS version against the patched releases. Use the command 'sw_vers' to check your current macOS version.

Impact Analysis

An attacker could exploit this to cause an app to crash or terminate unexpectedly. This may disrupt services or lead to denial-of-service conditions on affected macOS systems.

Compliance Impact

The provided CVE data does not specify how this vulnerability impacts compliance with standards like GDPR or HIPAA. The issue involves an out-of-bounds read that could cause unexpected system termination, but no direct implications for regulatory compliance are mentioned.

Mitigation Strategies

Update to the latest patched versions of macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, or macOS Tahoe 26.6 to address the out-of-bounds read vulnerability.

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