CVE-2025-3122Public exploitNetwork attack vector

CLI crash via unchecked func_ dereference

Published Apr 2, 2025 · Updated Apr 3, 2025

Null pointer dereference in WebAssembly WABT 1.0.36 allows remote attackers to crash wasm-interp with a crafted WebAssembly binary. The BeginFunctionBody method assigns func_ from an attacker-controlled function index without validating it, then writes code_offset through the resulting null pointer. Processing requires user interaction, and the invalid write terminates the affected command-line process.

CVSS severity2.3
Low
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Null pointer dereference in WebAssembly WABT 1.0.36 allows remote attackers to crash wasm-interp with a crafted WebAssembly binary. The BeginFunctionBody method assigns func_ from an attacker-controlled function index without validating it, then writes code_offset through the resulting null pointer. Processing requires user interaction, and the invalid write terminates the affected command-line process.

The record

CVE
CVE-2025-3122
Published
Apr 2, 2025
Updated
Apr 3, 2025
Vendor
WebAssembly
Product
WABT
Classifications
CWE-404, CWE-476, T1499.004, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 2, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 3, 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=1.0.36

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WebAssembly · WABTversion=1.0.36

Published CVSS scores

3.1VulDBCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
2.6VulDBAV:N/AC:H/Au:N/C:N/I:N/A:P
2.3VulDBCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
5.3NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/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.

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 exploitPublished

Weakness, pattern, technique

CWE-404Improper Resource Shutdown or Release
CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation
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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