CVE-2022-20420

Local privilege escalation via misordered exemption checks

Published Oct 11, 2022 · Updated Aug 3, 2024

Logic error in Android 13 Framework allows local users to bypass device policy restrictions and elevate privileges without interaction. AppRestrictionController.getBackgroundRestrictionExemptionReason returns user-configurable allowlist exemptions before checking fixed exemptions imposed by device policy. Exploitation requires execution by a local low-privileged app, and the bypass grants background-operation privileges that policy intended to deny.

CVSS severity7.8
High
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Logic error in Android 13 Framework allows local users to bypass device policy restrictions and elevate privileges without interaction. AppRestrictionController.getBackgroundRestrictionExemptionReason returns user-configurable allowlist exemptions before checking fixed exemptions imposed by device policy. Exploitation requires execution by a local low-privileged app, and the bypass grants background-operation privileges that policy intended to deny.

The record

CVE
CVE-2022-20420
Published
Oct 11, 2022
Updated
Aug 3, 2024
Vendor
Google Cloud
Product
Android
Classifications
T1626
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 11, 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?

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  1. Affected versionversion=Android-13

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Google Cloud · Androidversion=Android-13

Published CVSS scores

7.8NIST NVDCVSS: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.

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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

T1626Abuse Elevation Control Mechanism

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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