CVE-2021-0147

Local service interruption via improper firmware locking

Published Feb 9, 2022 · Updated May 5, 2025

Improper locking in Intel Power Management Controller firmware allows local users to interrupt platform availability on affected systems. The public record identifies improper locking in the PMC but does not disclose the locked resource, conflicting operations, or resulting failure mode. Exploitation requires local access with high privileges and affects availability only; Intel does not specify whether the outcome is a hang, crash, reboot, or shutdown.

CVSS severity4.4
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper locking in Intel Power Management Controller firmware allows local users to interrupt platform availability on affected systems. The public record identifies improper locking in the PMC but does not disclose the locked resource, conflicting operations, or resulting failure mode. Exploitation requires local access with high privileges and affects availability only; Intel does not specify whether the outcome is a hang, crash, reboot, or shutdown.

The record

CVE
CVE-2021-0147
Published
Feb 9, 2022
Updated
May 5, 2025
Vendor
Intel Corporation
Product
Intel Power Management Controller (PMC)
Classifications
CWE-667
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Feb 9, 2022CVE publishedPublication date reported by the CVE source.
  2. May 5, 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?

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  1. Affected versionversion=see references

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Intel Corporation · Intel Power Management Controller (PMC)version=see references

Published CVSS scores

4.4Intel CorporationCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
4.4CISA-ADPCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
4.4NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/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.

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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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-667Improper Locking

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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