CVE-2018-9344

Local privilege escalation via descrambler lifetime race

Published Nov 19, 2024 · Updated Nov 20, 2024

Use-after-free in Android 8.1 Media framework allows local users to gain elevated privileges through the CAS descrambler. DescramblerImpl and CasImpl kept plugin holders as raw pointers while concurrent accesses lacked atomic lifetime protection, allowing one thread to free an object still in use. A low-privileged local application can trigger the race without user interaction and execute with elevated privileges.

CVSS severity7.8
High
EPSS probability0.07%
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

Use-after-free in Android 8.1 Media framework allows local users to gain elevated privileges through the CAS descrambler. DescramblerImpl and CasImpl kept plugin holders as raw pointers while concurrent accesses lacked atomic lifetime protection, allowing one thread to free an object still in use. A low-privileged local application can trigger the race without user interaction and execute with elevated privileges.

The record

CVE
CVE-2018-9344
Published
Nov 19, 2024
Updated
Nov 20, 2024
Vendor
Google Cloud
Product
Android
Classifications
CWE-416, CWE-667, T1404
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 19, 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=8.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Google Cloud · Androidversion=8.1

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
CWE-667Improper Locking
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