CVE-2024-39476

Local storage hang via RAID5 daemon deadlock

Published Jul 5, 2024 · Updated May 23, 2026

Deadlock in the Linux kernel RAID5 driver allows local users to hang storage I/O and consume one CPU core during array activity. The raid5d loop keeps retrying plugged I/O while MD_SB_CHANGE_PENDING remains set, but md_check_recovery cannot clear the flag while another context holds reconfig_mutex. Reachability requires an active md RAID5 array and lock contention during I/O; the bounded consequence is a storage hang with sustained CPU spin.

CVSS severity5.5
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

Deadlock in the Linux kernel RAID5 driver allows local users to hang storage I/O and consume one CPU core during array activity. The raid5d loop keeps retrying plugged I/O while MD_SB_CHANGE_PENDING remains set, but md_check_recovery cannot clear the flag while another context holds reconfig_mutex. Reachability requires an active md RAID5 array and lock contention during I/O; the bounded consequence is a storage hang with sustained CPU spin.

The record

CVE
CVE-2024-39476
Published
Jul 5, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 5, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=1c00bb624cd084e2006520ad0edacaff0fb941c4 <634ba3c97ec413cb10681c7b196db43ee461ecf4
  2. Affected versionversion=2cab058f2b147e0b7c01546ba00445e5701861f5
  3. Affected versionversion=4.14.296 <4.15
  4. Affected versionversion=4.19.262 <4.19.316
  5. Affected versionversion=5.10.150 <5.10.219
  6. Affected versionversion=5.15.75 <5.15.161
  7. Affected versionversion=5.19.17 <5.20
  8. Affected versionversion=5.4.220 <5.4.278
  9. Affected versionversion=5e2cf333b7bd5d3e62595a44d598a254c697cd74 <151f66bb618d1fd0eeb84acb61b4a9fa5d8bb0fa
  10. Affected versionversion=5e2cf333b7bd5d3e62595a44d598a254c697cd74 <3f8d5e802d4cedd445f9a89be8c3fd2d0e99024b
  11. Affected versionversion=5e2cf333b7bd5d3e62595a44d598a254c697cd74 <cd2538e5af495b3c747e503db346470fc1ffc447
  12. Affected versionversion=5e2cf333b7bd5d3e62595a44d598a254c697cd74 <e332a12f65d8fed8cf63bedb4e9317bb872b9ac7
  13. Affected versionversion=6.0.3 <6.1
  14. Affected versionversion=6.1
  15. Affected versionversion=782b3e71c957991ac8ae53318bc369049d49bb53 <aa64464c8f4d2ab92f6d0b959a1e0767b829d787
  16. Affected versionversion=7d808fe6af8409cf9f46ed2b10840e5788985e9b
  17. Affected versionversion=91962e40ec3d26e291db230cd45b302da2aff200
  18. Affected versionversion=9e86dffd0b02594d2e7c60c6db9e889c0395414b <098d54934814dd876963abfe751c3b1cf7fbe56a
  19. Affected versionversion=f3d55bd5b7b928ad82f8075d89c908702f3593ab <b32aa95843cac6b12c2c014d40fca18aef24a347

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1c00bb624cd084e2006520ad0edacaff0fb941c4 <634ba3c97ec413cb10681c7b196db43ee461ecf4; version=2cab058f2b147e0b7c01546ba00445e5701861f5; version=4.14.296 <4.15; version=4.19.262 <4.19.316; version=5.10.150 <5.10.219; version=5.15.75 <5.15.161; version=5.19.17 <5.20; version=5.4.220 <5.4.278; version=5e2cf333b7bd5d3e62595a44d598a254c697cd74 <151f66bb618d1fd0eeb84acb61b4a9fa5d8bb0fa; version=5e2cf333b7bd5d3e62595a44d598a254c697cd74 <3f8d5e802d4cedd445f9a89be8c3fd2d0e99024b; version=5e2cf333b7bd5d3e62595a44d598a254c697cd74 <cd2538e5af495b3c747e503db346470fc1ffc447; version=5e2cf333b7bd5d3e62595a44d598a254c697cd74 <e332a12f65d8fed8cf63bedb4e9317bb872b9ac7; version=6.0.3 <6.1; version=6.1; version=782b3e71c957991ac8ae53318bc369049d49bb53 <aa64464c8f4d2ab92f6d0b959a1e0767b829d787; version=7d808fe6af8409cf9f46ed2b10840e5788985e9b; version=91962e40ec3d26e291db230cd45b302da2aff200; version=9e86dffd0b02594d2e7c60c6db9e889c0395414b <098d54934814dd876963abfe751c3b1cf7fbe56a; version=f3d55bd5b7b928ad82f8075d89c908702f3593ab <b32aa95843cac6b12c2c014d40fca18aef24a347

Published CVSS scores

5.5NIST National Vulnerability DatabaseCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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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