CVE-2022-20502

Local information disclosure via stale DexFile cache

Published Dec 13, 2022 · Updated Apr 22, 2025

Use-after-free in Android Runtime in Android 13 allows local users to disclose process information through a stale DexFile cache. When DexFile_closeDexFile frees a DexFile during garbage collection, dex_caches_ retains its address, and GetResolvedMethod can later dereference the stale entry. A low-privileged local process can trigger the flaw without user interaction; the documented consequence is information disclosure only.

CVSS severity5.5
Medium
EPSS probability0.16%
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 Runtime in Android 13 allows local users to disclose process information through a stale DexFile cache. When DexFile_closeDexFile frees a DexFile during garbage collection, dex_caches_ retains its address, and GetResolvedMethod can later dereference the stale entry. A low-privileged local process can trigger the flaw without user interaction; the documented consequence is information disclosure only.

The record

CVE
CVE-2022-20502
Published
Dec 13, 2022
Updated
Apr 22, 2025
Vendor
Google Cloud
Product
Android
Classifications
CWE-416
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 13, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 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?

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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

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

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-416Use After Free

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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