CVE-2026-43817: An app may be able to cause unexpected system termination in Apple iOS and iPadOS
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, watchOS 26.6. An app may be able to cause unexpected system termination.
AI Analysis
Technical Summary
This vulnerability involves an out-of-bounds read (CWE-125) in Apple iOS and iPadOS that could be triggered by a malicious app to cause unexpected system termination, impacting system availability. The issue was resolved by Apple through improved bounds checking and fixed in iOS 26.6 and iPadOS 26.6. The CVSS v3.1 score is 5.5 (medium), reflecting local attack vector, low complexity, no privileges required, user interaction needed, unchanged scope, and impact limited to availability.
Potential Impact
An attacker with local access and the ability to get a user to interact with a malicious app could cause the affected device to unexpectedly terminate system processes, leading to denial of service. There is no impact on confidentiality or integrity.
Mitigation Recommendations
This vulnerability is fixed in iOS 26.6 and iPadOS 26.6. Users and administrators should update to these versions or later to remediate the issue. No other mitigation or workaround is indicated.
CVE-2026-43817: An app may be able to cause unexpected system termination in Apple iOS and iPadOS
Description
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, watchOS 26.6. An app may be able to cause unexpected system termination.
CVSS v3.1
Score 5.5medium
Affected software
Apple
iOS and iPadOS
Apple
macOS
Apple
tvOS
Apple
visionOS
Apple
watchOS
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an out-of-bounds read (CWE-125) in Apple iOS and iPadOS that could be triggered by a malicious app to cause unexpected system termination, impacting system availability. The issue was resolved by Apple through improved bounds checking and fixed in iOS 26.6 and iPadOS 26.6. The CVSS v3.1 score is 5.5 (medium), reflecting local attack vector, low complexity, no privileges required, user interaction needed, unchanged scope, and impact limited to availability.
Potential Impact
An attacker with local access and the ability to get a user to interact with a malicious app could cause the affected device to unexpectedly terminate system processes, leading to denial of service. There is no impact on confidentiality or integrity.
Mitigation Recommendations
This vulnerability is fixed in iOS 26.6 and iPadOS 26.6. Users and administrators should update to these versions or later to remediate the issue. No other mitigation or workaround is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2026-05-01T22:46:27.822Z
- State
- PUBLISHED
Threat ID: 6a67c1be9c2644c7f8cb121e
Added to database: 07/27/2026, 20:38:22 UTC
Last enriched: 07/29/2026, 23:31:22 UTC
Last updated: 09/11/2026, 02:52:22 UTC
Views: 66
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