CVE-2023-20944Public exploit

Local privilege escalation via crafted parcel deserialization

Published Feb 28, 2023 · Updated Mar 21, 2025

Unsafe deserialization in Android 10, 11, 12, 12L, and 13 allows local users to escalate privileges through ChooseTypeAndAccountActivity. The activity accepts an authenticator-supplied LabeledIntent whose crafted label reparses Parcel data as activity-launch options. A local app with no special execution privileges can place its activity over another task without user interaction.

CVSS severity7.8
High
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unsafe deserialization in Android 10, 11, 12, 12L, and 13 allows local users to escalate privileges through ChooseTypeAndAccountActivity. The activity accepts an authenticator-supplied LabeledIntent whose crafted label reparses Parcel data as activity-launch options. A local app with no special execution privileges can place its activity over another task without user interaction.

The record

CVE
CVE-2023-20944
Published
Feb 28, 2023
Updated
Mar 21, 2025
Vendor
Google Cloud
Product
Android
Classifications
CWE-502, T1068
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Feb 28, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 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-10 Android-11 Android-12 Android-12L Android-13

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 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
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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1068Exploitation for Privilege Escalation

Public exploit references

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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