CVE-2024-26756

Local denial of service via stuck RAID reshape

Published Apr 3, 2024 · Updated May 11, 2026

Denial of service in Linux kernel 2.6.17 through 6.7.6 allows local users to hang device-mapper RAID teardown after an interrupted reshape. When RAID10 or RAID5 reassembly registers sync_thread directly, MD_RECOVERY_RUNNING can remain set because md_do_sync never runs to clear it. Reachability requires local access to interrupt and reassemble an affected md reshape, and stop_sync_thread then waits indefinitely.

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

Denial of service in Linux kernel 2.6.17 through 6.7.6 allows local users to hang device-mapper RAID teardown after an interrupted reshape. When RAID10 or RAID5 reassembly registers sync_thread directly, MD_RECOVERY_RUNNING can remain set because md_do_sync never runs to clear it. Reachability requires local access to interrupt and reassemble an affected md reshape, and stop_sync_thread then waits indefinitely.

The record

CVE
CVE-2024-26756
Published
Apr 3, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-459, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 3, 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=2.6.17
  2. Affected versionversion=f67055780caac6a99f43834795c43acf99eba6a6 <13b520fb62b772e408f9b79c5fe18ad414e90417
  3. Affected versionversion=f67055780caac6a99f43834795c43acf99eba6a6 <ad39c08186f8a0f221337985036ba86731d6aafe

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.17; version=f67055780caac6a99f43834795c43acf99eba6a6 <13b520fb62b772e408f9b79c5fe18ad414e90417; version=f67055780caac6a99f43834795c43acf99eba6a6 <ad39c08186f8a0f221337985036ba86731d6aafe

Published CVSS scores

5.5NIST NVDCVSS: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-459Incomplete Cleanup
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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