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PatchSiren cyber security CVE debrief

CVE-2026-43812 Apple CVE debrief

A use after free issue was addressed with improved memory management in various Apple operating systems, including iOS, iPadOS, macOS, tvOS, and visionOS. This vulnerability could allow an app to cause unexpected system termination. The issue is addressed in iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6. Defenders should verify patch deployment and review system logs for potential exploitation attempts. The CVE record indicates a use after free issue addressed with improved memory management. Users of Apple devices running affected operating systems should apply patches to prevent potential system termination. IT teams responsible for managing Apple devices should prioritize patch deployment and monitor system logs for potential exploitation attempts. The issue has not been modified since its publication on 2026-07-27T21:17:04.330Z.

Vendor
Apple
Product
iOS and iPadOS
CVSS
CRITICAL 9.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-27
Original CVE updated
2026-08-17
Advisory published
2026-07-27
Advisory updated
2026-08-17

Who should care

Users of Apple devices running affected operating systems, including iOS, iPadOS, macOS, tvOS, and visionOS, should apply patches to prevent potential system termination. IT teams responsible for managing Apple devices should prioritize patch deployment and monitor system logs for potential exploitation attempts. Security teams should review system logs for potential exploitation attempts and verify patch deployment. Operators of affected systems should ensure that patches are applied to prevent potential system termination. Vulnerability management teams should prioritize patch deployment for affected Apple devices.

Technical summary

A use after free issue was addressed with improved memory management in iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6. An app may be able to cause unexpected system termination due to improper memory handling. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6. The vulnerability could allow an app to execute arbitrary code with kernel privileges.

Defensive priority

Apply patches for iOS, iPadOS, macOS, tvOS, and visionOS to prevent system termination.

Recommended defensive actions

  • Apply iOS 18.7.10 and iPadOS 18.7.10 updates
  • Apply iOS 26.6 and iPadOS 26.6 updates
  • Apply macOS Sequoia 15.7.8 and macOS Tahoe 26.6 updates
  • Apply tvOS 26.6 and visionOS 26.6 updates
  • Inventory affected Apple devices and ensure patches are applied
  • Review system logs for potential exploitation attempts
  • Verify patch deployment and monitor for suspicious activity

Evidence notes

The CVE record indicates a use after free issue addressed with improved memory management in various Apple operating systems. An app may be able to cause unexpected system termination. Defenders should verify patch deployment and review system logs for potential exploitation attempts. The issue is addressed in iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-27T21:17:04.330Z and has not been modified since then.