CVE-2024-27009

Device unavailability via unlocked online-state evaluation

Published May 1, 2024 · Updated May 11, 2026

Race condition in s390 channel I/O in Linux allows local users to leave an affected device unavailable during online processing. A path-verification request can arrive after ccw_device_set_online() finishes waiting for final state but before it evaluates that state because the CCW-device lock is not held across both operations. Local low-privileged access and precise timing are required; a triggered race leaves the device inconsistent, and later online attempts fail with ENODEV.

CVSS severity4.7
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

Race condition in s390 channel I/O in Linux allows local users to leave an affected device unavailable during online processing. A path-verification request can arrive after ccw_device_set_online() finishes waiting for final state but before it evaluates that state because the CCW-device lock is not held across both operations. Local low-privileged access and precise timing are required; a triggered race leaves the device inconsistent, and later online attempts fail with ENODEV.

The record

CVE
CVE-2024-27009
Published
May 1, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-362, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 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=2297791c92d04a154ad29ba5a073f9f627982110 <2d8527f2f911fab84aec04df4788c0c23af3df48
  2. Affected versionversion=2297791c92d04a154ad29ba5a073f9f627982110 <2df56f4ea769ff81e51bbb05699989603bde9c49
  3. Affected versionversion=2297791c92d04a154ad29ba5a073f9f627982110 <3076b3c38a704e10df5e143c213653309d532538
  4. Affected versionversion=2297791c92d04a154ad29ba5a073f9f627982110 <559f3a6333397ab6cd4a696edd65a70b6be62c6e
  5. Affected versionversion=2297791c92d04a154ad29ba5a073f9f627982110 <a4234decd0fe429832ca81c4637be7248b88b49e
  6. Affected versionversion=5.15

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2297791c92d04a154ad29ba5a073f9f627982110 <2d8527f2f911fab84aec04df4788c0c23af3df48; version=2297791c92d04a154ad29ba5a073f9f627982110 <2df56f4ea769ff81e51bbb05699989603bde9c49; version=2297791c92d04a154ad29ba5a073f9f627982110 <3076b3c38a704e10df5e143c213653309d532538; version=2297791c92d04a154ad29ba5a073f9f627982110 <559f3a6333397ab6cd4a696edd65a70b6be62c6e; version=2297791c92d04a154ad29ba5a073f9f627982110 <a4234decd0fe429832ca81c4637be7248b88b49e; version=5.15

Published CVSS scores

4.7SUSECVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
4.7UbuntuCVSS:3.1/AV:L/AC:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
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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