Bug 2460709 (CVE-2026-31441)

Summary: CVE-2026-31441 kernel: dmaengine: idxd: Fix memory leak when a wq is reset
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in the Linux kernel's `dmaengine: idxd` module. This vulnerability occurs when a workqueue is reset, specifically within the `idxd_wq_disable_cleanup()` function. The function prematurely sets the workqueue type to NONE before all associated resources are released, leading to a memory leak. This can potentially impact system stability and resource availability.
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Description OSIDB Bzimport 2026-04-22 15:06:46 UTC 
In the Linux kernel, the following vulnerability has been resolved:

dmaengine: idxd: Fix memory leak when a wq is reset

idxd_wq_disable_cleanup() which is called from the reset path for a
workqueue, sets the wq type to NONE, which for other parts of the
driver mean that the wq is empty (all its resources were released).

Only set the wq type to NONE after its resources are released.
Comment 1 Keith Grant 2026-04-22 17:07:22 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026042244-CVE-2026-31441-eb92@gregkh/T