CVE-2026-84510

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Heap Buffer Overflow in Apple iOS and macOS

Publication date: 2026-09-14

Last updated on: 2026-09-18

Assigner: Apple Inc.

Description

A heap buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. Mounting a maliciously crafted volume may lead to unexpected system termination.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-14

Last Modified

2026-09-18

Generated

2026-10-05

AI Q&A

2026-09-15

EPSS Evaluated

2026-10-04

NVD

CVE-2026-84510

Affected Vendors & Products

Vendor	Product	Version / Range
apple	ipados	to 26.7 (exc)
apple	iphone_os	to 26.7 (exc)
apple	macos	From 15.0 (inc) to 15.8 (exc)
apple	macos	From 26.0 (inc) to 26.7 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This is a heap buffer overflow vulnerability caused by insufficient bounds checking. When a maliciously crafted volume is mounted, it may trigger unexpected system termination due to memory corruption.

Detection Guidance

This vulnerability is specific to Apple operating systems and relates to a heap buffer overflow in volume mounting. Detection would typically require checking system logs for crashes during volume mounting or using Apple's security tools like XProtect or MRT updates.

Impact Analysis

An attacker could exploit this to crash your device unexpectedly by mounting a specially crafted file system. This could lead to data loss or denial of service on affected Apple devices.

Compliance Impact

The provided CVE data does not specify any direct impact on compliance with standards like GDPR or HIPAA. The vulnerability involves a heap buffer overflow that could cause unexpected system termination when mounting a maliciously crafted volume.

Mitigation Strategies

Update affected Apple devices to the latest patched versions: iOS 26.7 or later, iPadOS 26.7 or later, iOS 27 or later, iPadOS 27 or later, macOS Golden Gate 27, macOS Sequoia 15.8, or macOS Tahoe 26.7.

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