CVE-2022-43849

Local system crash via undisclosed pfcdd flaw

Published Dec 23, 2022 · Updated Apr 15, 2025

Denial of service in the pfcdd kernel extension in IBM AIX 7.1, 7.2, and 7.3 allows local users to crash the system. IBM identifies the affected locus as bos.pfcdd.rte but has not published the malformed operation or input that triggers the failure. A non-privileged local account is sufficient, and successful exploitation affects availability only by crashing the host.

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 pfcdd kernel extension in IBM AIX 7.1, 7.2, and 7.3 allows local users to crash the system. IBM identifies the affected locus as bos.pfcdd.rte but has not published the malformed operation or input that triggers the failure. A non-privileged local account is sufficient, and successful exploitation affects availability only by crashing the host.

The record

CVE
CVE-2022-43849
Published
Dec 23, 2022
Updated
Apr 15, 2025
Vendor
IBM
Product
AIX
Classifications
T1499.004
Attack vector
local
Privileges
unauthenticated

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 privilegesunauthenticated

What is affected?

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

Published CVSS scores

6.2IBMCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.2NVDCVSS:3.1/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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