CVE-2024-27532Public exploitNetwork attack vector

Runtime crash via null result-type dereference

Published Nov 8, 2024 · Updated Nov 19, 2024

NULL pointer dereference in WebAssembly Micro Runtime commit 06df58f allows remote attackers to crash the runtime with a crafted Wasm file. During bytecode loading, wasm_loader_check_br reaches block_type_get_result_types, which reads a null address while resolving branch result types. The file must be accepted for loading, and the resulting process abort interrupts only the affected runtime instance.

CVSS severity7.5
High
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in WebAssembly Micro Runtime commit 06df58f allows remote attackers to crash the runtime with a crafted Wasm file. During bytecode loading, wasm_loader_check_br reaches block_type_get_result_types, which reads a null address while resolving branch result types. The file must be accepted for loading, and the resulting process abort interrupts only the affected runtime instance.

The record

CVE
CVE-2024-27532
Published
Nov 8, 2024
Updated
Nov 19, 2024
Vendor
Bytecode Alliance
Product
WebAssembly Micro Runtime
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 8, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 19, 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=commit 06df58f

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Bytecode Alliance · WebAssembly Micro Runtimeversion=commit 06df58f

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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.

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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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application 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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