CVE-2024-27528Public exploit

Process crash via invalid select-operation memory read

Published Nov 8, 2024 · Updated Nov 18, 2024

Out-of-bounds read in Wasm3 commit 139076a allows attackers to crash the runtime by executing a crafted WebAssembly file. The op_Select_i32_ssr interpreter operation dereferences an invalid address while handling attacker-controlled select bytecode. Reachability requires a process or embedding application to load the file; public evidence demonstrates a local process crash, while code execution remains unverified.

CVSS severity8.4
High
EPSS probability0.24%
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 commit 139076a allows attackers to crash the runtime by executing a crafted WebAssembly file. The op_Select_i32_ssr interpreter operation dereferences an invalid address while handling attacker-controlled select bytecode. Reachability requires a process or embedding application to load the file; public evidence demonstrates a local process crash, while code execution remains unverified.

The record

CVE
CVE-2024-27528
Published
Nov 8, 2024
Updated
Nov 18, 2024
Vendor
Wasm3 Labs
Product
Wasm3
Classifications
CWE-125, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 8, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 18, 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?

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  1. Affected versionversion=139076a98b8321b67f850a844f558b5e91b5ac83

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Wasm3 Labs · Wasm3version=139076a98b8321b67f850a844f558b5e91b5ac83

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-125Out-of-bounds Read
T1203Exploitation for Client Execution

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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