CVE-2024-56610

Local service interruption via sleeping KCSAN spinlock

Published Dec 27, 2024 · Updated May 11, 2026

Improper locking in the Linux kernel allows local users to interrupt service when KCSAN reports a race on PREEMPT_RT systems. KCSAN's report-filter path takes report_filterlist_lock as a non-raw spinlock in interrupt context, where the lock can sleep on real-time kernels. The defect requires a KCSAN-enabled PREEMPT_RT build and a detected data race, producing an invalid-context kernel fault that can interrupt service.

CVSS severity5.5
Medium
EPSS probability0.22%
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 the Linux kernel allows local users to interrupt service when KCSAN reports a race on PREEMPT_RT systems. KCSAN's report-filter path takes report_filterlist_lock as a non-raw spinlock in interrupt context, where the lock can sleep on real-time kernels. The defect requires a KCSAN-enabled PREEMPT_RT build and a detected data race, producing an invalid-context kernel fault that can interrupt service.

The record

CVE
CVE-2024-56610
Published
Dec 27, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 27, 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=5.8
  2. Affected versionversion=dfd402a4c4baae42398ce9180ff424d589b8bffc <0ab4951c1473c7d1ceaf1232eb927109cd1c4859
  3. Affected versionversion=dfd402a4c4baae42398ce9180ff424d589b8bffc <59458fa4ddb47e7891c61b4a928d13d5f5b00aa0
  4. Affected versionversion=dfd402a4c4baae42398ce9180ff424d589b8bffc <889a0d3a35fdedba1c5dcb6410c95c32421680ec
  5. Affected versionversion=dfd402a4c4baae42398ce9180ff424d589b8bffc <dca4e74a918586913d251c0b359e8cc96a3883ea
  6. Affected versionversion=dfd402a4c4baae42398ce9180ff424d589b8bffc <ea6588abcc15d68fdeae777ffe3dd74c02eab407
  7. Affected versionversion=dfd402a4c4baae42398ce9180ff424d589b8bffc <f4f2ef66d288ea796ddb8ecbdc2df074ab2d5f4d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.8; version=dfd402a4c4baae42398ce9180ff424d589b8bffc <0ab4951c1473c7d1ceaf1232eb927109cd1c4859; version=dfd402a4c4baae42398ce9180ff424d589b8bffc <59458fa4ddb47e7891c61b4a928d13d5f5b00aa0; version=dfd402a4c4baae42398ce9180ff424d589b8bffc <889a0d3a35fdedba1c5dcb6410c95c32421680ec; version=dfd402a4c4baae42398ce9180ff424d589b8bffc <dca4e74a918586913d251c0b359e8cc96a3883ea; version=dfd402a4c4baae42398ce9180ff424d589b8bffc <ea6588abcc15d68fdeae777ffe3dd74c02eab407; version=dfd402a4c4baae42398ce9180ff424d589b8bffc <f4f2ef66d288ea796ddb8ecbdc2df074ab2d5f4d

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

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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