CVE-2021-0432

Local privilege escalation via cache-clearing race

Published Apr 13, 2021 · Updated Aug 3, 2024

Use-after-free in Android 11 StatsPullerManager allows local users to elevate privileges by racing cache-clearing operations. ClearPullerCacheIfNecessary and ForceClearPullerCache access the shared kAllPullAtomInfo cache without holding its lock while pullers can be registered or unregistered. Exploitation requires local low-privileged code, no user interaction, and successful timing of the race; the resulting memory corruption grants higher privileges.

CVSS severity7.0
High
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

Use-after-free in Android 11 StatsPullerManager allows local users to elevate privileges by racing cache-clearing operations. ClearPullerCacheIfNecessary and ForceClearPullerCache access the shared kAllPullAtomInfo cache without holding its lock while pullers can be registered or unregistered. Exploitation requires local low-privileged code, no user interaction, and successful timing of the race; the resulting memory corruption grants higher privileges.

The record

CVE
CVE-2021-0432
Published
Apr 13, 2021
Updated
Aug 3, 2024
Vendor
Google Cloud
Product
Android
Classifications
CWE-362, T1404
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 13, 2021CVE 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-11

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Google Cloud · Androidversion=Android-11

Published CVSS scores

7.0NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
4.4NIST NVDAV:L/AC:M/Au:N/C:P/I:P/A:P

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
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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