EUVD-2026-40216
GHSA-82rg-2v44-mpvr
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Trigger is a locally installed app so AV:L not AV:N; no extra privileges or interaction needed (PR:N/UI:N); kernel memory corruption and panic give I:H/A:H with no disclosure (C:N).
Primary rating from Vendor (apple).
CVSS VectorVendor: apple
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Lifecycle Timeline
5DescriptionCVE.org
This issue was addressed with improved input validation. 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 or corrupt kernel memory.
AnalysisAI
Kernel memory corruption in Apple iOS/iPadOS (before 26.5.2) and macOS Tahoe (before 26.5.2) allows a malicious or compromised app to corrupt kernel memory or trigger unexpected system termination via malformed input that bypasses validation. Reported by Apple internally and fixed with improved input validation; no public exploit identified at time of analysis and the issue is not listed in CISA KEV. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to already be running code in an app context on the target device (the description states 'An app may be able to cause unexpected system termination or corrupt kernel memory') - i.e., a malicious or compromised application must be installed and executing. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals conflict and must be reconciled. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker convinces a user to install a seemingly benign app (or compromises an existing one) that invokes the vulnerable kernel interface with malformed input, corrupting kernel memory to crash the device or, with further effort, to escalate privileges and escape the app sandbox. No public POC is referenced, and the low attack complexity means a working trigger, once developed, would reliably reproduce on unpatched 26.5.x devices. |
| Remediation | Apply the vendor-released patch: update to iOS 26.5.2 and iPadOS 26.5.2 on mobile devices and to macOS Tahoe 26.5.2 on Macs, per Apple advisories https://support.apple.com/en-us/127594 and https://support.apple.com/en-us/127595. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all iOS, iPadOS, and macOS Tahoe devices in your managed device fleet. …
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External POC / Exploit Code
Leaving vuln.today