CVE-2022-36938Network attack vector

Code execution via unchecked DEX string table bounds

Published Nov 10, 2022 · Updated May 1, 2025

Out-of-bounds read in ReDex before commit 3b44c64 allows remote attackers to execute code through a crafted third-party Android APK. DexLoader trusts encoded string-table offsets and counts without confirming that the resulting table remains within the DEX file. The APK must enter a workflow that invokes ReDex, and successful exploitation executes code with the optimizer process's privileges.

CVSS severity9.8
Critical
EPSS probability1.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in ReDex before commit 3b44c64 allows remote attackers to execute code through a crafted third-party Android APK. DexLoader trusts encoded string-table offsets and counts without confirming that the resulting table remains within the DEX file. The APK must enter a workflow that invokes ReDex, and successful exploitation executes code with the optimizer process's privileges.

The record

CVE
CVE-2022-36938
Published
Nov 10, 2022
Updated
May 1, 2025
Vendor
Meta
Product
ReDex
Classifications
CWE-1284, CWE-125, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 10, 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=unspecified <3b44c64

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Meta · ReDexversion=unspecified <3b44c64

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1284Improper Validation of Specified Quantity in Input
CWE-125Out-of-bounds Read
T1203Exploitation for Client Execution

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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