CVE-2026-43694

Undergoing Analysis Undergoing Analysis - In Progress

Memory Corruption in macOS Leading to Kernel Write

Publication date: 2026-07-27

Last updated on: 2026-07-29

Assigner: Apple Inc.

Description

The issue was addressed with improved memory handling. 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 or write kernel memory.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-07-27

Last Modified

2026-07-29

Generated

2026-08-17

AI Q&A

2026-07-28

EPSS Evaluated

2026-08-15

NVD

CVE-2026-43694

EUVD

EUVD-2026-49521

Affected Vendors & Products

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

KEV

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

Executive Summary

This vulnerability involves improved memory handling issues in Apple operating systems. An app could potentially cause unexpected system crashes or write to kernel memory, leading to serious system instability or security risks.

Detection Guidance

Detection requires checking macOS version against patched releases. For Sequoia, Sonoma, or Tahoe, verify if the system is running versions 15.7.8, 14.8.8, or 26.6 or later respectively. Use 'sw_vers' command to check macOS version.

Impact Analysis

An attacker could exploit this flaw to crash your system or gain unauthorized access to kernel memory, potentially compromising sensitive data or system integrity. Users of affected macOS versions are at risk until the update is applied.

Compliance Impact

The provided CVE data does not specify any direct impact on compliance with standards like GDPR or HIPAA. The vulnerability involves potential unexpected system termination or kernel memory write, but no details are given about data exposure or privacy implications that would affect such regulations.

Mitigation Strategies

Update macOS to the latest patched version immediately: Sequoia 15.7.8, Sonoma 14.8.8, or Tahoe 26.6. Enable automatic updates to prevent future vulnerabilities. Remove untrusted apps that may exploit this issue.

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