CVE-2026-43739: An app may be able to cause unexpected system termination in Apple iOS and iPadOS
An out-of-bounds write issue 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
CVE-2026-43739 is an out-of-bounds write vulnerability (CWE-787) that was mitigated by improved bounds checking in several Apple OS platforms. The vulnerability could be triggered by an application to cause unexpected system termination, impacting system availability. The vulnerability has been fixed in version 26.6 of iOS, iPadOS, macOS Tahoe, tvOS, visionOS, and watchOS. The CVSS 3.1 vector indicates local attack vector with low complexity, no privileges required, user interaction required, unchanged scope, no confidentiality or integrity impact, but high impact on availability.
Potential Impact
An attacker with local access and no privileges could exploit this vulnerability by tricking a user into interacting with a malicious application, leading to unexpected system termination (denial of service). There is no impact on confidentiality or integrity. No known exploits are reported in the wild.
Mitigation Recommendations
This vulnerability is fixed in Apple operating system versions 26.6 for iOS, iPadOS, macOS Tahoe, tvOS, visionOS, and watchOS. Users and administrators should update to these versions to remediate the issue. No additional mitigation steps are indicated.
CVE-2026-43739: An app may be able to cause unexpected system termination in Apple iOS and iPadOS
Description
An out-of-bounds write issue 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
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-43739 is an out-of-bounds write vulnerability (CWE-787) that was mitigated by improved bounds checking in several Apple OS platforms. The vulnerability could be triggered by an application to cause unexpected system termination, impacting system availability. The vulnerability has been fixed in version 26.6 of iOS, iPadOS, macOS Tahoe, tvOS, visionOS, and watchOS. The CVSS 3.1 vector indicates local attack vector with low complexity, no privileges required, user interaction required, unchanged scope, no confidentiality or integrity impact, but high impact on availability.
Potential Impact
An attacker with local access and no privileges could exploit this vulnerability by tricking a user into interacting with a malicious application, leading to unexpected system termination (denial of service). There is no impact on confidentiality or integrity. No known exploits are reported in the wild.
Mitigation Recommendations
This vulnerability is fixed in Apple operating system versions 26.6 for iOS, iPadOS, macOS Tahoe, tvOS, visionOS, and watchOS. Users and administrators should update to these versions to remediate the issue. No additional mitigation steps are indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-vp5c-8x5g-v7j9
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-43739"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a6942019c2644c7f86ce0b2
Added to database: 07/28/2026, 23:57:53 UTC
Last enriched: 07/29/2026, 11:08:18 UTC
Last updated: 09/11/2026, 07:31:53 UTC
Views: 131
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