Service interruption via mismatched workqueue reclaim flags
Published May 20, 2024 · Updated May 12, 2026
A workqueue dependency flaw in Linux 4.14 and later affected branches allows local users to interrupt service through the i40e driver. The i40e initialization path marks i40e_wq with WQ_MEM_RECLAIM, but i40e_service_task can flush the i40iw non-reclaim workqueue and trigger check_flush_dependency. Reachability requires both i40e and i40iw to be loaded during SR-IOV operation; the published impact is limited to availability.
Summary
What happened
A workqueue dependency flaw in Linux 4.14 and later affected branches allows local users to interrupt service through the i40e driver. The i40e initialization path marks i40e_wq with WQ_MEM_RECLAIM, but i40e_service_task can flush the i40iw non-reclaim workqueue and trigger check_flush_dependency. Reachability requires both i40e and i40iw to be loaded during SR-IOV operation; the published impact is limited to availability.
The record
- CVE
- CVE-2024-36004
- Published
- May 20, 2024
- Updated
- May 12, 2026
- Vendor
- Siemens
- Product
- SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
- Classifications
- Unavailable
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- May 20, 2024CVE publishedPublication date reported by the CVE source.
- May 12, 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?
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- Affected versionversion=0 <*
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What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
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Public exploit references
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Technologies
Your stack
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Your stack
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