CVE-2022-43282Public exploit

Interpreter crash via invalid return-call type read

Published Oct 28, 2022 · Updated May 8, 2025

Out-of-bounds read in WebAssembly WABT wasm-interp 1.0.29 allows local users to crash it with a crafted WebAssembly module. While parsing a return_call_indirect expression, OnReturnCallIndirectExpr calls GetReturnCallDropKeepCount, which reads an invalid FuncType vector while computing stack drop and keep counts. A local user must supply the module and enable all WebAssembly features; the demonstrated consequence is an interpreter crash.

CVSS severity7.1
High
EPSS probability0.31%
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 WebAssembly WABT wasm-interp 1.0.29 allows local users to crash it with a crafted WebAssembly module. While parsing a return_call_indirect expression, OnReturnCallIndirectExpr calls GetReturnCallDropKeepCount, which reads an invalid FuncType vector while computing stack drop and keep counts. A local user must supply the module and enable all WebAssembly features; the demonstrated consequence is an interpreter crash.

The record

CVE
CVE-2022-43282
Published
Oct 28, 2022
Updated
May 8, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 28, 2022CVE publishedPublication date reported by the CVE source.
  2. May 8, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
7.1CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1204.002Malicious File

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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