CVE-2026-84616: Apple iPadOS Use-After-Free Vulnerability

CVE-2026-84616 Overview

CVE-2026-84616 is a type confusion vulnerability affecting multiple Apple operating systems. An application running locally can trigger the flaw to cause unexpected system termination, resulting in a denial-of-service condition. The issue was addressed through improved memory handling in patched releases across Apple's platform portfolio. The vulnerability is classified under [CWE-441] and requires local access with low privileges to exploit. No user interaction is required to trigger the condition once a malicious application is running on the target device.

Critical Impact
A local application can trigger type confusion in system components, causing unexpected system termination and denial of service across iOS, iPadOS, macOS, tvOS, visionOS, and watchOS platforms.

Affected Products

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

Discovery Timeline

2026-09-14 - CVE-2026-84616 published to the National Vulnerability Database (NVD)
2026-09-18 - Last updated in the NVD database

Technical Details for CVE-2026-84616

Vulnerability Analysis

CVE-2026-84616 is a type confusion vulnerability in shared Apple operating system components. Type confusion occurs when code accesses a memory region using an incompatible type assumption, leading to memory corruption or invalid operations. In this case, the flaw causes the affected process or kernel component to terminate unexpectedly. The vulnerability produces an availability impact without compromising data confidentiality or integrity. Apple addressed the issue by improving memory handling within the affected components. Because the same code appears across the Apple platform stack, a single defect propagates to iOS, iPadOS, macOS, tvOS, visionOS, and watchOS.

Root Cause

The root cause is improper type validation during object handling, categorized as [CWE-441] Unintended Proxy or Intermediary. When affected code processes an object of an unexpected type, the resulting operation triggers a fault. Apple's fix introduces additional memory-handling checks to reject or safely process the mismatched type.

Attack Vector

Exploitation requires a locally installed application with low privileges. An attacker who convinces a user to run a crafted application, or who already has code execution on the device, can invoke the vulnerable interface to force system termination. No network access and no user interaction beyond running the malicious app are required. Refer to the Apple Support Document #149034 and related advisories for component-specific details.

No public exploitation code is available and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.

Detection Methods for CVE-2026-84616

Indicators of Compromise

Unexpected kernel panics, reboots, or process crashes on Apple devices that correlate with launches of specific third-party or sideloaded applications
Crash reports referencing type-related exceptions or memory-handling faults in system components
Repeated ReportCrash or SubmitDiagInfo events tied to a single application bundle identifier

Detection Strategies

Collect and analyze macOS .ips crash logs and iOS diagnostic reports from managed devices for recurring signatures involving type confusion or invalid object access
Use mobile device management (MDM) telemetry to correlate application installs with subsequent system stability events
Monitor endpoint telemetry for applications performing unusual system-call patterns immediately before crashes

Monitoring Recommendations

Track OS build versions across the fleet and flag devices running builds earlier than iOS 26.7, iPadOS 26.7, macOS Sequoia 15.8, macOS Tahoe 26.7, tvOS 27, visionOS 27, or watchOS 27
Aggregate crash reports through centralized logging to detect clusters of terminations that may indicate targeted abuse
Alert on installation of unsigned or non-App-Store applications on managed endpoints

How to Mitigate CVE-2026-84616

Immediate Actions Required

Update all Apple devices to the fixed releases: iOS 26.7, iPadOS 26.7, iOS 27, iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7, tvOS 27, visionOS 27, and watchOS 27
Enforce automatic OS updates through MDM for all managed Apple endpoints
Restrict installation of unsigned or sideloaded applications on corporate devices

Patch Information

Apple released fixes across its platform lineup. Consult the vendor advisories for build-specific details: Apple Support Document #149034, #149035, #149036, #149037, #149038, #149041, #149042, and #149043.

Workarounds

No vendor-published workaround exists; applying the OS update is the only supported remediation
Limit installation of untrusted applications and enforce App Store or notarized-app policies until patches are deployed
Use MDM configuration profiles to restrict application capabilities on high-risk devices

bash

# Verify current OS build on macOS and confirm patched version
sw_vers
softwareupdate --list
softwareupdate --install --all --restart