CVE-2022-20135

Local privilege escalation via mutable reserialized Bundles

Published Jun 15, 2022 · Updated Aug 3, 2024

Parcel format mismatch in Android 10, 11, 12, and 12L allows local users to execute Intents with system privileges. GateKeeperResponse.writeToParcel handles a zero-length byte-array payload inconsistently with createFromParcel, allowing a malicious app's Bundle to change contents after reserialization. Exploitation requires user-level application execution but no user interaction, and the resulting Intent runs with system privileges.

CVSS severity7.8
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Parcel format mismatch in Android 10, 11, 12, and 12L allows local users to execute Intents with system privileges. GateKeeperResponse.writeToParcel handles a zero-length byte-array payload inconsistently with createFromParcel, allowing a malicious app's Bundle to change contents after reserialization. Exploitation requires user-level application execution but no user interaction, and the resulting Intent runs with system privileges.

The record

CVE
CVE-2022-20135
Published
Jun 15, 2022
Updated
Aug 3, 2024
Vendor
Google Cloud
Product
Android
Classifications
T1404
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 15, 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 privilegesauthenticated

What is affected?

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

Published CVSS scores

7.2NIST NVDAV:L/AC:L/Au:N/C:C/I:C/A:C
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.

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

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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