CVE-2026-43773 - Vulnerability Details - OpenCVE

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. Mounting a maliciously crafted disk image may cause unexpected system termination or corrupt kernel memory.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable yes

Technical Impact total

Vendors	Products
Apple	Macos

No data.

No data.

References

Link	Providers
https://support.apple.com/en-us/128067
https://support.apple.com/en-us/128071
https://support.apple.com/en-us/128072

History

Tue, 04 Aug 2026 13:45:00 +0000

Type	Values Removed	Values Added
Title		Kernel Out‑of‑Bounds Read via Malicious Disk Image

Mon, 03 Aug 2026 16:30:00 +0000

Type	Values Removed	Values Added
Title	Out-of-Bounds Read via Malicious Disk Image Causes Kernel Memory Corruption on macOS
Weaknesses	CWE-788

Thu, 30 Jul 2026 01:15:00 +0000

Type	Values Removed	Values Added
Title		Out-of-Bounds Read via Malicious Disk Image Causes Kernel Memory Corruption on macOS
Weaknesses		CWE-788

Tue, 28 Jul 2026 16:15:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-125
Metrics		cvssV3_1 `{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}` ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Tue, 28 Jul 2026 03:15:00 +0000

Type	Values Removed	Values Added
First Time appeared		Apple Apple macos
Vendors & Products		Apple Apple macos

Mon, 27 Jul 2026 20:30:00 +0000

Type	Values Removed	Values Added
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. Mounting a maliciously crafted disk image may cause unexpected system termination or corrupt kernel memory.
References		https://support.apple.com/en-us/128067 https://support.apple.com/en-us/128071 https://support.apple.com/en-us/128072

MITRE

Status: PUBLISHED

Assigner: apple

Published: 2026-07-27T20:13:35.376Z

Updated: 2026-07-28T14:11:14.799Z

Reserved: 2026-05-01T22:46:27.818Z

Link: CVE-2026-43773

Vulnrichment

Updated: 2026-07-28T14:11:04.780Z

NVD

No data.

Redhat

No data.

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