EUVD-2026-40191
GHSA-q3vp-fjcp-c43f
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Local app execution required with timing-dependent race condition (AC:H, PR:L); impact is system crash only, with no confidentiality or integrity compromise.
Primary rating from Vendor (apple).
CVSS VectorVendor: apple
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
4DescriptionCVE.org
A race condition was addressed with improved state handling. This issue is fixed in iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2. An app may be able to cause unexpected system termination.
AnalysisAI
Race condition in Apple iOS, iPadOS, and macOS Tahoe allows a locally-running app with standard privileges to trigger unexpected system termination. Rooted in improper state handling during concurrent operations (CWE-362), exploitation is constrained by high attack complexity due to the timing-dependent nature of race conditions. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a malicious or attacker-controlled application to be installed and executing on the target device - precluding purely remote, zero-interaction attack paths. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS base score of 4.7 (Medium) accurately reflects limited real-world urgency. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker distributes a malicious app - either through sideloading, an enterprise distribution profile, or by evading App Store review - that deliberately manipulates concurrent OS-level operations to win the race condition window. Upon triggering the timing-sensitive state corruption, the device experiences an unexpected system termination (crash/reboot), creating a denial-of-service condition. … |
| Remediation | Vendor-released patch: iOS 26.5.2, iPadOS 26.5.2, and macOS Tahoe 26.5.2. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-362 – Race Condition
View allSame technique Race Condition
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External POC / Exploit Code
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