CVE-2024-56583

Kernel warning via duplicate deadline-entity initialization

Published Dec 27, 2024 · Updated May 23, 2026

A scheduler flaw in the Linux kernel allows local users to trigger a kernel warning by repeatedly migrating boosted deadline tasks. set_cpus_allowed dequeues and re-enqueues the boosted task with ENQUEUE_RESTORE, causing enqueue_dl_entity to call setup_new_dl_entity after rt_mutex_setprio has already initialized its parameters. Repeated real-time cyclic workloads are required; the documented result is a WARN_ON with availability impact but no confidentiality or integrity impact.

CVSS severity5.5
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A scheduler flaw in the Linux kernel allows local users to trigger a kernel warning by repeatedly migrating boosted deadline tasks. set_cpus_allowed dequeues and re-enqueues the boosted task with ENQUEUE_RESTORE, causing enqueue_dl_entity to call setup_new_dl_entity after rt_mutex_setprio has already initialized its parameters. Repeated real-time cyclic workloads are required; the documented result is a WARN_ON with availability impact but no confidentiality or integrity impact.

The record

CVE
CVE-2024-56583
Published
Dec 27, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 27, 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=295d6d5e373607729bcc8182c25afe964655714f <0664e2c311b9fa43b33e3e81429cd0c2d7f9c638
  2. Affected versionversion=295d6d5e373607729bcc8182c25afe964655714f <b600d30402854415aa57548a6b53dc6478f65517
  3. Affected versionversion=295d6d5e373607729bcc8182c25afe964655714f <e41074904d9ed3fe582d6e544c77b40c22043c82
  4. Affected versionversion=4.14.70 <4.15
  5. Affected versionversion=4.15
  6. Affected versionversion=fd8cb2e71cdd8e814cbdadddd0d0e6e3d49eaa2c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=295d6d5e373607729bcc8182c25afe964655714f <0664e2c311b9fa43b33e3e81429cd0c2d7f9c638; version=295d6d5e373607729bcc8182c25afe964655714f <b600d30402854415aa57548a6b53dc6478f65517; version=295d6d5e373607729bcc8182c25afe964655714f <e41074904d9ed3fe582d6e544c77b40c22043c82; version=4.14.70 <4.15; version=4.15; version=fd8cb2e71cdd8e814cbdadddd0d0e6e3d49eaa2c

Published CVSS scores

5.5CanonicalCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5SUSECVSS: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

No sourced classifications are available.

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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