CVE-2026-84607: Apple iPadOS Race Condition Vulnerability

CVE-2026-84607 Overview

CVE-2026-84607 is a race condition vulnerability [CWE-362] affecting multiple Apple operating systems. A sandboxed application can exploit the flaw to execute arbitrary code with kernel privileges. Apple addressed the issue through improved state management across its OS platforms.

The vulnerability spans iOS, iPadOS, macOS, tvOS, visionOS, and watchOS. Exploitation requires local access and elevated attack complexity, but successful exploitation results in full sandbox escape with kernel-level code execution.

Critical Impact
A sandboxed app may be able to execute arbitrary code with kernel privileges, breaking out of Apple's sandbox boundary and compromising the entire operating system.

Affected Products

Apple iOS and iPadOS (prior to 26.7 and 27)
Apple macOS Sequoia 15.8, macOS Tahoe 26.7, macOS Golden Gate 27
Apple tvOS 27, visionOS 27, watchOS 27

Discovery Timeline

2026-09-14 - CVE-2026-84607 published to NVD
2026-09-16 - Last updated in NVD database

Technical Details for CVE-2026-84607

Vulnerability Analysis

CVE-2026-84607 is a kernel race condition classified under [CWE-362]. The flaw exists in kernel state handling where concurrent operations can access or modify shared resources without proper synchronization. An attacker with the ability to run a sandboxed application can trigger the race window and manipulate kernel state to achieve arbitrary code execution.

Apple's advisory attributes the fix to "improved state management," indicating the patch introduces additional synchronization or atomicity guarantees around the vulnerable code path. The scope change in the CVSS vector reflects the sandbox-to-kernel boundary crossing, where a compromised low-privilege component impacts resources beyond its security authority.

Root Cause

The root cause is a time-of-check to time-of-use (TOCTOU) style condition in kernel code. Concurrent threads can race against a validated state, causing the kernel to operate on data that has been modified between validation and use. This creates an opportunity to corrupt kernel memory or divert control flow.

Attack Vector

Exploitation requires a locally installed sandboxed application. The attacker triggers the race condition by executing carefully timed operations that invoke the vulnerable kernel code path from multiple threads. Successful timing allows the attacker to escape the App Sandbox and execute code within kernel context, yielding full control of the device.

No authentication beyond installed-app privileges is required, and no user interaction is needed once the malicious app runs. Apple has not reported in-the-wild exploitation for this specific CVE. Refer to the Apple security advisories for component-level details.

Detection Methods for CVE-2026-84607

Indicators of Compromise

Unexpected kernel panics or system crashes originating from sandboxed applications
Sandboxed processes spawning unsigned or unexpected child processes with elevated entitlements
Anomalous kernel extension loads or unusual kext activity on macOS endpoints
Applications making repeated, high-frequency IOKit or Mach trap calls indicative of race-window probing

Detection Strategies

Monitor macOS Endpoint Security (ES_EVENT_TYPE_NOTIFY_EXEC) events for sandboxed apps launching processes outside their expected entitlement scope
Correlate kernel panic logs with recently installed or executed third-party applications
Baseline normal syscall patterns for App Store applications and alert on statistical deviations
Track macOS version compliance across managed fleets to identify unpatched devices

Monitoring Recommendations

Ingest macOS unified logs and crash reports into a centralized analytics platform for retrospective hunting
Alert on privilege transitions where a sandboxed process gains root or kernel-adjacent capabilities
Review MDM inventory reports for devices running iOS or iPadOS below 26.7 or macOS Sequoia below 15.8

How to Mitigate CVE-2026-84607

Immediate Actions Required

Update to iOS 26.7, iPadOS 26.7, or the version 27 line across all affected Apple platforms
Upgrade macOS endpoints to Sequoia 15.8, Tahoe 26.7, or Golden Gate 27
Update tvOS, visionOS, and watchOS devices to version 27
Audit third-party applications and remove unnecessary or untrusted software from managed devices

Patch Information

Apple released fixes across the OS family. Consult the vendor advisories for platform-specific build numbers: Apple Support 149034, 149035, 149036, 149037, 149038, 149041, 149042, and 149043.

Workarounds

No vendor-supplied workarounds exist; patching is the only remediation
Restrict application installation to vetted App Store or notarized sources via MDM policy
Enforce Lockdown Mode on high-risk iOS and macOS users to reduce attack surface until patches are deployed
Block sideloading and enterprise-signed applications from untrusted developers

bash

# Verify current macOS version and confirm patched build
sw_vers -productVersion

# Trigger a software update check on macOS
sudo softwareupdate --list
sudo softwareupdate --install --all --restart