CVE-2025-31234 Overview
CVE-2025-31234 is an input sanitization weakness affecting multiple Apple operating systems. The flaw allows a network-positioned attacker to trigger unexpected system termination or corrupt kernel memory on targeted devices. Apple addressed the issue with improved input validation in iOS 18.5, iPadOS 18.5, macOS Sequoia 15.5, tvOS 18.5, and visionOS 2.5. The vulnerability is classified under [CWE-119] (Improper Restriction of Operations within the Bounds of a Memory Buffer) and carries integrity and availability impact across the Apple device ecosystem.
Critical Impact
A remote, unauthenticated attacker can corrupt kernel memory or force system termination, undermining device integrity and availability across iOS, iPadOS, macOS, tvOS, and visionOS.
Affected Products
- Apple iOS and iPadOS prior to 18.5
- Apple macOS Sequoia prior to 15.5
- Apple tvOS prior to 18.5 and visionOS prior to 2.5
Discovery Timeline
- 2025-05-12 - CVE-2025-31234 published to the National Vulnerability Database (NVD)
- 2026-04-02 - Last updated in NVD database
Technical Details for CVE-2025-31234
Vulnerability Analysis
CVE-2025-31234 originates in input handling logic shared across Apple's operating system family. Insufficient sanitization of attacker-controlled input permits values that violate buffer bounds assumptions in kernel-adjacent code paths. Successful exploitation results in unexpected system termination or corruption of kernel memory structures.
The flaw is reachable over the network without authentication or user interaction. While confidentiality impact is not reported, the integrity and availability consequences are significant because corrupted kernel memory can destabilize the operating system or be leveraged as a primitive in chained exploits.
The Exploit Prediction Scoring System (EPSS) probability is 0.523% as of 2026-05-04, indicating low near-term exploitation likelihood, though no public proof-of-concept has been observed.
Root Cause
The root cause is improper input validation [CWE-119] in a component shared across iOS, iPadOS, macOS, tvOS, and visionOS. Apple's advisories indicate the fix introduces stricter sanitization to reject malformed input before it reaches sensitive memory operations. Without this validation, crafted input can drive memory accesses outside intended buffer boundaries.
Attack Vector
An attacker delivers a crafted network payload to a vulnerable Apple device. Because privileges and user interaction are not required, exploitation can occur against any reachable device running an unpatched OS version. The result is either a denial-of-service condition through unexpected system termination or kernel memory corruption that may enable further compromise.
No public exploit code or proof-of-concept is currently available. Refer to the Apple Security Update 122404 and related advisories for vendor technical details.
Detection Methods for CVE-2025-31234
Indicators of Compromise
- Unexpected kernel panics or device reboots on Apple endpoints, particularly when correlated with inbound network activity
- Repeated crash reports referencing kernel components on devices running pre-18.5 / pre-15.5 OS versions
- Anomalous packets from untrusted sources targeting Apple devices on the network perimeter
Detection Strategies
- Inventory Apple devices via mobile device management (MDM) and flag systems running iOS/iPadOS below 18.5, macOS below 15.5, tvOS below 18.5, or visionOS below 2.5
- Aggregate device crash logs to a central SIEM and alert on recurring kernel termination events
- Monitor network telemetry for anomalous traffic patterns directed at Apple endpoints in managed environments
Monitoring Recommendations
- Ingest MDM compliance and OS version data into the security data lake for continuous version drift monitoring
- Correlate endpoint reboot or panic events with network flow data to identify potential exploitation attempts
- Track Apple's advisory pages for updated guidance and additional CVE references at Apple Security Update 122716
How to Mitigate CVE-2025-31234
Immediate Actions Required
- Update all Apple devices to iOS 18.5, iPadOS 18.5, macOS Sequoia 15.5, tvOS 18.5, or visionOS 2.5 or later
- Enforce automatic updates through MDM policies for managed fleets
- Restrict exposure of Apple devices to untrusted networks until patching completes
Patch Information
Apple released fixes through the following advisories: Apple Security Update 122404, Apple Security Update 122716, Apple Security Update 122720, and Apple Security Update 122721. Additional disclosure context is available in the Full Disclosure mailing list archive.
Workarounds
- No vendor workaround exists; patching is the only supported remediation
- Reduce network exposure by placing devices behind segmented networks and trusted Wi-Fi only
- Disable unnecessary network services and require VPN access for remote Apple endpoints
# Verify macOS version compliance on managed endpoints
sw_vers -productVersion
# Example MDM query (jamf) to list non-compliant macOS hosts
jamf policy -event checkOSVersion
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
