CVE-2026-86892: Apple iPadOS Denial of Service Vulnerability

CVE-2026-86892 Overview

CVE-2026-86892 is a denial-of-service vulnerability affecting Apple iOS, iPadOS, and visionOS. The flaw stems from missing entitlement checks in a component reachable by local applications. A malicious app installed on the device can trigger the condition and cause a denial-of-service. Apple resolved the issue by adding additional entitlement checks in iOS 26.7, iPadOS 26.7, iOS 27, iPadOS 27, and visionOS 27. The weakness is tracked as CWE-770: Allocation of Resources Without Limits or Throttling and requires local access with low privileges and no user interaction.

Critical Impact
A local app can exhaust device resources and disrupt availability on affected iPhone, iPad, and Apple Vision Pro devices until the process is terminated or the device is restarted.

Affected Products

Apple iOS (versions prior to 26.7 and 27)
Apple iPadOS (versions prior to 26.7 and 27)
Apple visionOS (versions prior to 27)

Discovery Timeline

2026-09-14 - CVE-2026-86892 published to the National Vulnerability Database
2026-09-18 - Last updated in NVD database

Technical Details for CVE-2026-86892

Vulnerability Analysis

The vulnerability resides in an Apple operating system component that failed to enforce entitlement checks before executing privileged operations. Entitlements on Apple platforms function as capability tokens that gate access to sensitive system APIs and services. When a component omits these checks, unentitled processes can invoke functionality that was intended for signed system code.

In this case, the exposed functionality allows a local app to consume or hold resources without proper throttling, aligning with CWE-770. The result is a denial-of-service condition affecting the targeted service or the device as a whole. Confidentiality and integrity are not impacted, but availability is degraded until intervention occurs.

Root Cause

The root cause is missing authorization enforcement. The vulnerable code path accepted requests from local callers without verifying that the caller held the required entitlement. Apple's fix, described in Apple Support Article 149034, Article 149038, and Article 149041, adds those checks so only entitled processes can reach the affected code.

Attack Vector

Exploitation requires a local, low-privileged app running on the target device. No user interaction is needed once the app executes. An attacker delivers the malicious app through sideloading, developer provisioning, or a trojanized App Store submission. The app then invokes the unprotected interface repeatedly or with crafted parameters to trigger resource exhaustion and denial-of-service.

No public proof-of-concept, exploit tooling, or CISA KEV listing exists for CVE-2026-86892 at the time of publication. Technical details are not published beyond Apple's advisories.

Detection Methods for CVE-2026-86892

Indicators of Compromise

Unexpected crashes or hangs of system daemons on iOS, iPadOS, or visionOS devices shortly after third-party app launches.
Repeated device reboots or springboard restarts correlated with a specific application bundle identifier.
MDM telemetry showing devices running iOS or iPadOS below 26.7, or visionOS below 27.

Detection Strategies

Inventory managed Apple devices through Mobile Device Management (MDM) and flag those on OS builds predating the patched releases.
Review crash reports collected via MDM or Apple Business Manager for stack traces referencing the components fixed in Apple's advisories.
Correlate app install events with device stability degradation to identify apps abusing the vulnerable interface.

Monitoring Recommendations

Enable MDM-based OS version compliance policies and alert on non-compliant devices.
Forward device crash and reliability telemetry to a centralized SIEM or data lake for longitudinal analysis.
Monitor enterprise app catalogs and developer-signed builds for unexpected entitlement or capability usage.

How to Mitigate CVE-2026-86892

Immediate Actions Required

Update all iPhone and iPad devices to iOS 26.7, iPadOS 26.7, or iOS 27 and iPadOS 27.
Update all Apple Vision Pro devices to visionOS 27.
Restrict sideloading and enforce app vetting for enterprise-deployed applications.
Remove or quarantine any third-party app associated with unexpected device instability.

Patch Information

Apple addressed the vulnerability by adding entitlement checks in the affected component. Patched releases are iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, and visionOS 27. Refer to Apple Support Article 149034, Apple Support Article 149038, and Apple Support Article 149041 for the full advisories and update instructions.

Workarounds

No vendor-supplied workaround exists; applying the OS updates is the only supported remediation.
Limit installation to trusted apps from the App Store and enforce policies through MDM until updates are deployed.
Use MDM configuration profiles to restrict enterprise app provisioning where feasible.

bash

# Verify device OS version via MDM query or on-device Settings
# Settings > General > About > Software Version
# Target versions: iOS/iPadOS 26.7 or 27, visionOS 27