CVE-2022-29379

Development-build crash via miscalculated module path length

Published May 25, 2022 · Updated Aug 3, 2024

Stack-buffer overflow in NGINX njs allows attackers to crash an unreleased development build by importing an overlong module path. The njs_module_path function replaces the required buffer length with the directory length instead of adding it, then copies the full joined path into the undersized stack buffer. Upstream states the defect existed only between unreleased commits, so 0.7.2 through 0.7.4 are unaffected; triggering it requires control of trusted JavaScript loaded at startup.

CVSS severity9.8
Critical
EPSS probability1.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-buffer overflow in NGINX njs allows attackers to crash an unreleased development build by importing an overlong module path. The njs_module_path function replaces the required buffer length with the directory length instead of adding it, then copies the full joined path into the undersized stack buffer. Upstream states the defect existed only between unreleased commits, so 0.7.2 through 0.7.4 are unaffected; triggering it requires control of trusted JavaScript loaded at startup.

The record

CVE
CVE-2022-29379
Published
May 25, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1499.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. May 25, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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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