CVE-2022-21211Public exploitNetwork attack vector

Process crash via non-callable toString property

Published Jun 10, 2022 · Updated Sep 17, 2024

Unchecked return handling in node-posix 4.2.0 and earlier allows remote attackers to crash a Node.js process via crafted input. The native argument-conversion path treats a failed toString invocation as a 0x0 value and passes it into a type check that aborts the process. Exposure requires a consuming application to pass attacker-controlled values into an affected binding; successful exploitation interrupts that application process.

CVSS severity7.5
High
EPSS probability1.04%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unchecked return handling in node-posix 4.2.0 and earlier allows remote attackers to crash a Node.js process via crafted input. The native argument-conversion path treats a failed toString invocation as a 0x0 value and passes it into a type check that aborts the process. Exposure requires a consuming application to pass attacker-controlled values into an affected binding; successful exploitation interrupts that application process.

The record

CVE
CVE-2022-21211
Published
Jun 10, 2022
Updated
Sep 17, 2024
Vendor
Mika Eloranta
Product
node-posix
Classifications
CWE-252, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 10, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=0 <unspecified

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mika Eloranta · node-posixversion=0 <unspecified

Published CVSS scores

5.9SnykCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.0NVDAV:N/AC:L/Au:N/C:N/I:N/A:P

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-252Unchecked Return Value
T1499Endpoint Denial of Service

Public exploit references

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Technologies

Your stack

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Your stack

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