CVE-2024-26899

Local storage hang via block-holder mutex deadlock

Published Apr 17, 2024 · Updated May 11, 2026

Improper locking in Linux kernel 6.7 through 6.8.1 allows local users to hang block-device I/O during RAID reconfiguration. The bd_link_disk_holder() path reuses gendisk's open_mutex while creating holder symlinks, letting partition scanning retain that mutex while awaiting resumed RAID I/O. Low-privileged local access and concurrent partition scanning plus array modification are required; the resulting circular wait interrupts storage service.

CVSS severity5.5
Medium
EPSS probability0.21%
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 Linux kernel 6.7 through 6.8.1 allows local users to hang block-device I/O during RAID reconfiguration. The bd_link_disk_holder() path reuses gendisk's open_mutex while creating holder symlinks, letting partition scanning retain that mutex while awaiting resumed RAID I/O. Low-privileged local access and concurrent partition scanning plus array modification are required; the resulting circular wait interrupts storage service.

The record

CVE
CVE-2024-26899
Published
Apr 17, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 17, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record 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=1b0a2d950ee2a54aa04fb31ead32144be0bbf690 <03f12122b20b6e6028e9ed69030a49f9cffcbb75
  2. Affected versionversion=1b0a2d950ee2a54aa04fb31ead32144be0bbf690 <1e5c5b0abaee7b62a10b9707a62083b71ad21f62
  3. Affected versionversion=1b0a2d950ee2a54aa04fb31ead32144be0bbf690 <5a87c1f7993bc8ac358a3766bac5dc7126e01e98
  4. Affected versionversion=6.7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1b0a2d950ee2a54aa04fb31ead32144be0bbf690 <03f12122b20b6e6028e9ed69030a49f9cffcbb75; version=1b0a2d950ee2a54aa04fb31ead32144be0bbf690 <1e5c5b0abaee7b62a10b9707a62083b71ad21f62; version=1b0a2d950ee2a54aa04fb31ead32144be0bbf690 <5a87c1f7993bc8ac358a3766bac5dc7126e01e98; version=6.7

Published CVSS scores

5.5CanonicalCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NISTCVSS:3.1/AV:L/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-667Improper Locking
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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