CVE-2024-42245

Hard lockup via unbounded pinned-task scan

Published Aug 7, 2024 · Updated May 11, 2026

Denial of service in the scheduler of affected Linux kernel releases allows local users to trigger a hard lockup with CPU-pinned threads. The detach_tasks() load-balancing loop ignores env.max_loop after encountering pinned tasks and scans the entire run queue while holding its lock, often in softirq context. A local user must pin thousands of threads to one CPU; sustained scheduler traversal can freeze the host without disclosing or modifying data.

CVSS severity5.5
Medium
EPSS probability0.17%
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 the scheduler of affected Linux kernel releases allows local users to trigger a hard lockup with CPU-pinned threads. The detach_tasks() load-balancing loop ignores env.max_loop after encountering pinned tasks and scans the entire run queue while holding its lock, often in softirq context. A local user must pin thousands of threads to one CPU; sustained scheduler traversal can freeze the host without disclosing or modifying data.

The record

CVE
CVE-2024-42245
Published
Aug 7, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 7, 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=6.1
  2. Affected versionversion=b0defa7ae03ecf91b8bfd10ede430cff12fcbd06 <0fa6dcbfa2e2b97c1e6febbea561badf0931a38b
  3. Affected versionversion=b0defa7ae03ecf91b8bfd10ede430cff12fcbd06 <1e116c18e32b035a2d1bd460800072c8bf96bc44
  4. Affected versionversion=b0defa7ae03ecf91b8bfd10ede430cff12fcbd06 <2feab2492deb2f14f9675dd6388e9e2bf669c27a
  5. Affected versionversion=b0defa7ae03ecf91b8bfd10ede430cff12fcbd06 <d467194018dd536fe6c65a2fd3aedfcdb1424903

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.1; version=b0defa7ae03ecf91b8bfd10ede430cff12fcbd06 <0fa6dcbfa2e2b97c1e6febbea561badf0931a38b; version=b0defa7ae03ecf91b8bfd10ede430cff12fcbd06 <1e116c18e32b035a2d1bd460800072c8bf96bc44; version=b0defa7ae03ecf91b8bfd10ede430cff12fcbd06 <2feab2492deb2f14f9675dd6388e9e2bf669c27a; version=b0defa7ae03ecf91b8bfd10ede430cff12fcbd06 <d467194018dd536fe6c65a2fd3aedfcdb1424903

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-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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