CVE-2024-27530Public exploit

Runtime crash via freed module traversal

Published Nov 8, 2024 · Updated Mar 13, 2025

Use-after-free in ForEachModule in Wasm3 commit 139076a allows local users to crash the runtime with a crafted WebAssembly file. repl_load frees a parsed module after a function-signature mismatch, but runtime cleanup later traverses that freed module and reads its next pointer. The published reproducer requires local execution of Wasm3 on the crafted file and demonstrates an AddressSanitizer abort; code execution has not been demonstrated.

CVSS severity8.4
High
EPSS probability0.22%
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 ForEachModule in Wasm3 commit 139076a allows local users to crash the runtime with a crafted WebAssembly file. repl_load frees a parsed module after a function-signature mismatch, but runtime cleanup later traverses that freed module and reads its next pointer. The published reproducer requires local execution of Wasm3 on the crafted file and demonstrates an AddressSanitizer abort; code execution has not been demonstrated.

The record

CVE
CVE-2024-27530
Published
Nov 8, 2024
Updated
Mar 13, 2025
Vendor
Wasm3 Labs
Product
Wasm3
Classifications
CWE-416
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 8, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 13, 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=0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Wasm3 Labs · Wasm3version=0

Published CVSS scores

8.4CISA ADPCVSS:3.1/AV:L/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-416Use After Free

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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