CVE-2025-43462: Apple iPadOS DOS Vulnerability

CVE-2025-43462 Overview

CVE-2025-43462 is a memory handling vulnerability affecting multiple Apple operating systems including iOS, iPadOS, macOS Tahoe, tvOS, visionOS, and watchOS. The vulnerability stems from improper memory handling that can be exploited by a malicious application to cause unexpected system termination or corrupt kernel memory. This flaw represents a significant security concern as it affects the kernel—the core component responsible for managing system resources and security boundaries.

The vulnerability was addressed by Apple through improved memory handling mechanisms in subsequent operating system releases. Organizations and users running affected Apple devices should prioritize applying the available security updates to mitigate potential exploitation risks.

Critical Impact

A malicious application can exploit this vulnerability to cause system crashes or corrupt kernel memory, potentially leading to denial of service or further compromise of system integrity.

Affected Products

• Apple iOS versions prior to 26.1
• Apple iPadOS versions prior to 26.1
• Apple macOS Tahoe versions prior to 26.1
• Apple tvOS versions prior to 26.1
• Apple visionOS versions prior to 26.1
• Apple watchOS versions prior to 26.1

Discovery Timeline

• November 4, 2025 - CVE-2025-43462 published to NVD
• April 2, 2026 - Last updated in NVD database

Technical Details for CVE-2025-43462

Vulnerability Analysis

CVE-2025-43462 is classified under CWE-400 (Uncontrolled Resource Consumption), indicating that the vulnerability involves improper management of system resources. The flaw exists in the memory handling subsystem of Apple's operating systems, where insufficient controls allow an application to trigger memory operations that can corrupt kernel memory structures or exhaust resources leading to system termination.

The vulnerability is exploitable over a network vector without requiring authentication or user interaction, making it particularly concerning for enterprise environments where Apple devices are deployed at scale. The primary impact is to system availability, as successful exploitation results in denial of service through unexpected system crashes. Additionally, kernel memory corruption could potentially lead to further exploitation scenarios depending on the specific memory structures affected.

Root Cause

The root cause of this vulnerability lies in inadequate memory handling within Apple's kernel-level code. The flaw allows applications to perform memory operations without proper validation or resource limits, enabling them to corrupt kernel memory regions or trigger uncontrolled resource consumption. Apple addressed this by implementing improved memory handling mechanisms that enforce proper bounds checking and resource management.

Attack Vector

The attack vector for CVE-2025-43462 involves a malicious application running on an affected Apple device. The application can leverage the improper memory handling flaw to:

1. Trigger memory operations that exceed expected boundaries
2. Cause resource exhaustion in kernel memory management
3. Corrupt kernel memory structures leading to system instability
4. Force unexpected system termination (kernel panic)

The vulnerability does not require elevated privileges for initial exploitation, though the impact is primarily limited to denial of service. An attacker would need to deliver a malicious application to the target device, potentially through social engineering, app store compromise, or by exploiting another vulnerability that allows code execution.

Detection Methods for CVE-2025-43462

Indicators of Compromise

• Unexpected system crashes or kernel panics on Apple devices without clear cause
• Applications exhibiting abnormally high memory usage patterns before system termination
• Crash logs showing memory corruption errors or resource exhaustion in kernel space
• Repeated device reboots following application execution

Detection Strategies

• Monitor device crash logs and diagnostic reports for kernel panic events related to memory handling
• Implement mobile device management (MDM) solutions to track application behavior and system stability
• Deploy endpoint detection solutions capable of monitoring application memory usage patterns on Apple devices
• Establish baseline metrics for normal device operation to identify anomalous behavior

Monitoring Recommendations

• Enable automatic crash reporting on managed Apple devices to collect diagnostic data
• Configure alerts for devices experiencing multiple unexpected reboots within short timeframes
• Review installed applications across managed devices for untrusted or unknown software
• Maintain visibility into device OS versions to identify unpatched systems

How to Mitigate CVE-2025-43462

Immediate Actions Required

• Update all affected Apple devices to the latest available operating system versions immediately
• Review and remove any untrusted or unnecessary applications from affected devices
• Implement application whitelisting policies through MDM to prevent execution of unknown apps
• Prioritize patching for devices used in critical business operations or containing sensitive data

Patch Information

Apple has released security updates that address this vulnerability through improved memory handling. The following versions contain the fix:

• iOS 26.1 and iPadOS 26.1
• macOS Tahoe 26.1
• tvOS 26.1
• visionOS 26.1
• watchOS 26.1

For detailed patch information, refer to the official Apple Security Advisories:

• Apple Support Document #125632
• Apple Support Document #125634
• Apple Support Document #125637
• Apple Support Document #125638
• Apple Support Document #125639

Workarounds

• Restrict application installation to trusted sources only (App Store) until patches can be applied
• Limit device functionality through supervised mode or MDM restrictions for high-risk environments
• Isolate unpatched devices from sensitive network segments where feasible
• Enable automatic updates on all managed Apple devices to ensure timely patch deployment