CVE-2025-31221: Apple iPadOS Information Disclosure Flaw

CVE-2025-31221 Overview

CVE-2025-31221 is an integer overflow vulnerability affecting multiple Apple operating systems. The vulnerability stems from insufficient input validation that allows a remote attacker to trigger an integer overflow condition, resulting in memory disclosure. This flaw impacts a wide range of Apple devices including iPhones, iPads, Macs, Apple TVs, Apple Watches, and Vision Pro headsets.

Critical Impact
A remote attacker may be able to leak sensitive memory contents without requiring user interaction or authentication, potentially exposing confidential data across Apple's ecosystem of devices.

Affected Products

Apple watchOS (versions prior to 11.5)
Apple macOS Sonoma (versions prior to 14.7.6)
Apple tvOS (versions prior to 18.5)
Apple iPadOS (versions prior to 17.7.7 and 18.5)
Apple iOS (versions prior to 18.5)
Apple macOS Sequoia (versions prior to 15.5)
Apple visionOS (versions prior to 2.5)
Apple macOS Ventura (versions prior to 13.7.6)

Discovery Timeline

May 12, 2025 - CVE-2025-31221 published to NVD
November 3, 2025 - Last updated in NVD database

Technical Details for CVE-2025-31221

Vulnerability Analysis

This vulnerability is classified as CWE-190 (Integer Overflow or Wraparound). Integer overflow vulnerabilities occur when an arithmetic operation attempts to create a numeric value that exceeds the maximum value that can be represented within the available storage space. In this case, the integer overflow leads to improper memory handling that allows an attacker to read memory contents that should not be accessible.

The attack can be executed remotely over the network without requiring any privileges or user interaction, making it particularly concerning for enterprise environments with large Apple device deployments. The vulnerability exclusively impacts confidentiality—allowing memory disclosure—without affecting system integrity or availability.

Root Cause

The root cause of CVE-2025-31221 is inadequate input validation when processing certain data that involves arithmetic operations. When specially crafted input is provided, the calculation results in an integer value that wraps around due to exceeding the maximum integer boundary. This wraparound causes incorrect memory allocation sizes or buffer length calculations, leading to subsequent out-of-bounds memory access that leaks sensitive information.

Attack Vector

The vulnerability is exploitable over the network, meaning an attacker does not need local access to the target device. The attack requires no user interaction and no special privileges, making it highly accessible for remote exploitation.

The attack flow involves:

An attacker sends specially crafted network traffic to a vulnerable Apple device
The malformed input triggers an integer overflow in the affected component
The overflow causes improper memory bounds calculations
Memory contents beyond the intended buffer are disclosed to the attacker
Sensitive data such as cryptographic keys, session tokens, or other confidential information may be exposed

Detection Methods for CVE-2025-31221

Indicators of Compromise

Unusual network traffic patterns targeting Apple devices on internal networks
Unexpected memory-related crashes or instability in system processes
Evidence of memory dump artifacts in network traffic or logs
Anomalous process behavior indicating memory access violations

Detection Strategies

Deploy network intrusion detection systems (NIDS) to monitor for malformed packets targeting Apple services
Implement endpoint detection and response (EDR) solutions to identify unusual memory access patterns
Monitor system logs for memory-related errors or crashes that could indicate exploitation attempts
Enable enhanced logging on Apple devices through MDM solutions to capture security events

Monitoring Recommendations

Establish baseline network behavior for Apple devices and alert on deviations
Configure security information and event management (SIEM) systems to correlate Apple device security events
Monitor for connections from Apple devices to unknown or suspicious external IP addresses
Review Apple Security Research Device logs if available in enterprise environments

How to Mitigate CVE-2025-31221

Immediate Actions Required

Update all Apple devices to the patched versions immediately (iOS 18.5, iPadOS 18.5/17.7.7, macOS Sequoia 15.5/Sonoma 14.7.6/Ventura 13.7.6, watchOS 11.5, tvOS 18.5, visionOS 2.5)
Prioritize patching devices that handle sensitive data or have direct network exposure
Use Mobile Device Management (MDM) to enforce software update policies across the enterprise
Audit device inventory to identify any unpatched Apple devices in the environment

Patch Information

Apple has released security updates addressing this vulnerability across all affected platforms. Detailed patch information is available in the following Apple Support documents:

Workarounds

Segment networks to limit exposure of unpatched Apple devices to untrusted network traffic
Implement network-level filtering to restrict inbound connections to Apple devices where possible
Consider temporarily isolating critical Apple devices that cannot be immediately patched
Monitor for Apple security advisories and apply updates as soon as they become available

bash

# Check current OS version on macOS
sw_vers

# Force software update check on macOS
softwareupdate --list

# Install all available updates on macOS
softwareupdate --install --all

# For iOS/iPadOS devices, use MDM to push updates or navigate to:
# Settings > General > Software Update