CVE-2022-20344

Local privilege escalation via unsynchronized channel transfer

Published Aug 9, 2022 · Updated Aug 3, 2024

Race condition in Android 10 through 12L allows local users to escalate privileges by disrupting SurfaceFlinger process communication. EventThreadConnection::stealReceiveChannel moves and duplicates the shared BitTube channel descriptors without locking or first validating channel state. A low-privileged local process must win the timing window; no user interaction is required, and successful exploitation gains elevated device privileges.

CVSS severity7.0
High
EPSS probability0.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in Android 10 through 12L allows local users to escalate privileges by disrupting SurfaceFlinger process communication. EventThreadConnection::stealReceiveChannel moves and duplicates the shared BitTube channel descriptors without locking or first validating channel state. A low-privileged local process must win the timing window; no user interaction is required, and successful exploitation gains elevated device privileges.

The record

CVE
CVE-2022-20344
Published
Aug 9, 2022
Updated
Aug 3, 2024
Vendor
Google Cloud
Product
Android
Classifications
CWE-362, T1404
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 9, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=Android-10 Android-11 Android-12 Android-12L

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Google Cloud · Androidversion=Android-10 Android-11 Android-12 Android-12L

Published CVSS scores

7.0NVDCVSS:3.1/AV:L/AC:H/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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
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

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Your stack

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