CVE-2024-34246Public exploitNetwork attack vector

Process crash via unchecked compiler slot range

Published May 6, 2024 · Updated Aug 2, 2024

Out-of-bounds read in Wasm3 0.5.0 allows attackers to crash the command-line runtime with a crafted WebAssembly module. MarkSlotsAllocated fails to reject slot ranges beyond d_m3MaxFunctionSlots, allowing compilation-state corruption that leaves main with a null diagnostic message. Triggering requires the runtime to compile and invoke main from a crafted module; the demonstrated consequence is termination of the Wasm3 process.

CVSS severity7.5
High
EPSS probability0.52%
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 Wasm3 0.5.0 allows attackers to crash the command-line runtime with a crafted WebAssembly module. MarkSlotsAllocated fails to reject slot ranges beyond d_m3MaxFunctionSlots, allowing compilation-state corruption that leaves main with a null diagnostic message. Triggering requires the runtime to compile and invoke main from a crafted module; the demonstrated consequence is termination of the Wasm3 process.

The record

CVE
CVE-2024-34246
Published
May 6, 2024
Updated
Aug 2, 2024
Vendor
Wasm3 Labs
Product
Wasm3
Classifications
CWE-125, CAPEC-540, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 6, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Wasm3 Labs · Wasm3version=0.5.0

Published CVSS scores

7.5CISACVSS:3.1/AV:N/AC:L/PR:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read
CAPEC-540Overread Buffers
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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