CVE-2018-9396

Local privilege escalation via CCCI bounds error

Published Dec 4, 2024 · Updated Dec 5, 2024

Out-of-bounds write in Google Android's MediaTek CCCI kernel component allows local users with System privileges to escalate privileges. The rpc_msg_handler function and related handlers in drivers/misc/mediatek/eccci/port_rpc.c apply an incorrect bounds check to RPC messages, allowing writes beyond the intended buffer. Exploitation requires local System execution privileges and no user interaction; the published record does not identify the higher privilege reached.

CVSS severity6.7
Medium
EPSS probability0.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in Google Android's MediaTek CCCI kernel component allows local users with System privileges to escalate privileges. The rpc_msg_handler function and related handlers in drivers/misc/mediatek/eccci/port_rpc.c apply an incorrect bounds check to RPC messages, allowing writes beyond the intended buffer. Exploitation requires local System execution privileges and no user interaction; the published record does not identify the higher privilege reached.

The record

CVE
CVE-2018-9396
Published
Dec 4, 2024
Updated
Dec 5, 2024
Vendor
Google
Product
Google Pixel
Classifications
CWE-787, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Dec 4, 2024CVE publishedPublication date reported by the CVE source.
  2. Dec 5, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2018-06-05

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Google · Google Pixelversion=0 <2018-06-05
Google · Androidversion=0 <2018-06-05; version=Kernel

Published CVSS scores

7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.7NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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