CVE-2018-9471

Local privilege escalation via truncated parcel read

Published Nov 20, 2024 · Updated Nov 20, 2024

Type confusion in NanoAppFilter in Google Android 7.0 through 9 allows local users to escalate privileges in the system server. NanoAppFilter's parcel constructor reads the 64-bit mAppIdVendorMask field with readInt after writeToParcel serialized it with writeLong, shifting subsequent parcel data. Exploitation requires local code execution but no user interaction and grants privileges in the system-server process.

CVSS severity7.8
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Type confusion in NanoAppFilter in Google Android 7.0 through 9 allows local users to escalate privileges in the system server. NanoAppFilter's parcel constructor reads the 64-bit mAppIdVendorMask field with readInt after writeToParcel serialized it with writeLong, shifting subsequent parcel data. Exploitation requires local code execution but no user interaction and grants privileges in the system-server process.

The record

CVE
CVE-2018-9471
Published
Nov 20, 2024
Updated
Nov 20, 2024
Vendor
Google
Product
Android
Classifications
CWE-843, CWE-787, T1404
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 20, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 20, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=7
  2. Affected versionversion=7.0
  3. Affected versionversion=8
  4. Affected versionversion=8.0
  5. Affected versionversion=8.1
  6. Affected versionversion=9
  7. Affected versionversion=9.0
  8. Affected versionversion=nyc-mr1-dev
  9. Affected versionversion=nyc-mr2-dev

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Google · Androidversion=7; version=7.0; version=8; version=8.0; version=8.1; version=9; version=9.0; version=nyc-mr1-dev; version=nyc-mr2-dev

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-843Access of Resource Using Incompatible Type ('Type Confusion')
CWE-787Out-of-bounds Write
T1404Exploitation 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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo