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CVE-2018-9539

Status: ModifiedHigh (7)—PoC
Severity7High · CVSS 3.0
Exploitation probability0.35 %higher than 28% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitAvailableProof of concept on GitHub (unverified)

In the ClearKey CAS descrambler, there is a possible use after free due to a race condition. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Product: Android. Versions: Android-8.0 Android-8.1 Android-9. Android ID: A-113027383

CVSS

Base score
7
Version
3.0
Vector
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
0.35 %
Percentile among all scored CVEs
28
Score date
10/20/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

⚠️ GitHub proofs of concept are not verified: some are fake or contain malware. Never run them outside an isolated lab.

Affected technologies (1)

Google — Android

CWEs

References

Show 4 references

Raw JSON (NVD)

Show
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      "value": "In the ClearKey CAS descrambler, there is a possible use after free due to a race condition. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Product: Android. Versions: Android-8.0 Android-8.1 Android-9. Android ID: A-113027383"
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      "value": "En el descrambler de ClearKey CAS, hay un posible uso de memoria previamente liberada debido a una condición de carrera. Esto podría llevar a un escalado de privilegios local sin necesitar privilegios de ejecución adicionales. No se necesita interacción del usuario para explotarlo. Producto: Android. Versiones: Android-8.0 Android-8.1 Android-9. Android ID: A-113027383"
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  "lastModified": "2026-06-17T02:06:53.250",
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