CVE-2022-43380

Local service interruption via undisclosed NFS flaw

Published Dec 23, 2022 · Updated Apr 15, 2025

Denial of service in the IBM AIX NFS kernel extension in AIX 7.1, 7.2, and 7.3 and VIOS 3.1 allows local users to interrupt the system. IBM identifies the NFS kernel extension as the locus but has not published the flawed operation or the input that triggers it. Exploitation requires a non-privileged local account and affects availability, with no reported data disclosure or modification.

CVSS severity6.2
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the IBM AIX NFS kernel extension in AIX 7.1, 7.2, and 7.3 and VIOS 3.1 allows local users to interrupt the system. IBM identifies the NFS kernel extension as the locus but has not published the flawed operation or the input that triggers it. Exploitation requires a non-privileged local account and affects availability, with no reported data disclosure or modification.

The record

CVE
CVE-2022-43380
Published
Dec 23, 2022
Updated
Apr 15, 2025
Vendor
IBM
Product
AIX
Classifications
CWE-399, T1499
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 23, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 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=7.1, 7.2, 7.3, VIOS 3.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

IBM · AIXversion=7.1, 7.2, 7.3, VIOS 3.1

Published CVSS scores

6.2IBM CorporationCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.2IBM Security BulletinCVSS:3.0/AV:L/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.

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)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-399Resource Management Errors
T1499Endpoint Denial of Service

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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