Apple Multiple Products Improper Locking Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2026-03-20

[ Description ]Official description

A memory corruption issue was addressed with improved lock state checking. This issue is fixed in iOS 18.7.2 and iPadOS 18.7.2, iOS 26.1 and iPadOS 26.1, macOS Sequoia 15.7.2, macOS Sonoma 14.8.2, macOS Tahoe 26.1, tvOS 26.1, visionOS 26.1, watchOS 26.1. A malicious application may cause unexpected changes in memory shared between processes.

CISA: Apple watchOS, iOS, iPadOS, macOS, visionOS, and tvOS contain an improper locking vulnerability that could allow a malicious application to cause unexpected changes in memory shared between processes.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 3 Apr 2026): Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• support.apple.com/en-us/125632Release NotesVendor Advisory
• support.apple.com/en-us/125633Release NotesVendor Advisory
• support.apple.com/en-us/125634Release NotesVendor Advisory
• support.apple.com/en-us/125635Release NotesVendor Advisory
• support.apple.com/en-us/125636Release NotesVendor Advisory
• support.apple.com/en-us/125637Release NotesVendor Advisory
• support.apple.com/en-us/125638Release NotesVendor Advisory
• support.apple.com/en-us/125639Release NotesVendor Advisory
• cloud.google.com/blog/topics/threat-intelligence/darksword-ios-exploit-chainTechnical Description
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource