CVE-2022-20426

Phone-account selection denial via oversized Binder lists

Published Nov 8, 2022 · Updated May 1, 2025

Denial of service in Android 10, 11, 12, 12L, and 13 allows local users to block phone-account selection through resource exhaustion. TelecomManager list getters return PhoneAccount and PhoneAccountHandle collections as ordinary Binder lists; data over 1 MB triggers a silently swallowed TransactionTooLargeException and an empty result. No user interaction or extra execution privilege is required, and the bounded impact is loss of phone-account selection rather than device-wide shutdown.

CVSS severity5.5
Medium
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

Denial of service in Android 10, 11, 12, 12L, and 13 allows local users to block phone-account selection through resource exhaustion. TelecomManager list getters return PhoneAccount and PhoneAccountHandle collections as ordinary Binder lists; data over 1 MB triggers a silently swallowed TransactionTooLargeException and an empty result. No user interaction or extra execution privilege is required, and the bounded impact is loss of phone-account selection rather than device-wide shutdown.

The record

CVE
CVE-2022-20426
Published
Nov 8, 2022
Updated
May 1, 2025
Vendor
Google Cloud
Product
Android
Classifications
CWE-754, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 8, 2022CVE publishedPublication date reported by the CVE source.
  2. May 1, 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 privilegesauthenticated

What is affected?

Google Cloud · Androidversion=Android-10 Android-11 Android-12 Android-12L Android-13

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-754Improper Check for Unusual or Exceptional Conditions
T1499Endpoint Denial of Service

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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