CVE-2022-40673

Privileged file operations via unauthorized D-Bus methods

Published Sep 14, 2022 · Updated Aug 3, 2024

Missing authorization in KDiskMark before 3.1.0 allows local users to perform privileged file operations through D-Bus. The kdiskmark_helper process protects only init(), then exposes removeFile, prepareFile, and flushPageCache on the system bus without per-call authorization. The helper must first be started by a root-authenticated user; afterward, any local user can delete arbitrary files, create root-owned files, or drop filesystem caches, causing data loss or a performance interruption.

CVSS severity7.8
High
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in KDiskMark before 3.1.0 allows local users to perform privileged file operations through D-Bus. The kdiskmark_helper process protects only init(), then exposes removeFile, prepareFile, and flushPageCache on the system bus without per-call authorization. The helper must first be started by a root-authenticated user; afterward, any local user can delete arbitrary files, create root-owned files, or drop filesystem caches, causing data loss or a performance interruption.

The record

CVE
CVE-2022-40673
Published
Sep 14, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-862, T1548
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 14, 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1548Abuse Elevation Control Mechanism

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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