CVE-2022-20526

Local privilege escalation via unsynchronized frame metrics

Published Dec 16, 2022 · Updated Apr 21, 2025

Out-of-bounds write in CanvasContext::draw in Google Cloud Android 13 allows local users to escalate privileges through GPU frame metrics. The render path reads frame events while an asynchronous GPU callback mutates the same FrameInfo data because the shared mutex is acquired only after the writes. Exploitation requires user interaction but no existing execution privilege, and the bounded impact is local privilege escalation.

CVSS severity3.3
Low
EPSS probability0.13%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in CanvasContext::draw in Google Cloud Android 13 allows local users to escalate privileges through GPU frame metrics. The render path reads frame events while an asynchronous GPU callback mutates the same FrameInfo data because the shared mutex is acquired only after the writes. Exploitation requires user interaction but no existing execution privilege, and the bounded impact is local privilege escalation.

The record

CVE
CVE-2022-20526
Published
Dec 16, 2022
Updated
Apr 21, 2025
Vendor
Google Cloud
Product
Android
Classifications
CWE-787, T1068
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 16, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 21, 2025Record 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-13

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Google Cloud · Androidversion=Android-13

Published CVSS scores

3.3CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

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.

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No observations available

Sep 11, 2026Sep 17, 2026
Latest reporting daySep 17, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
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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