Bug 2516714 (CVE-2026-72148)

Summary: CVE-2026-72148 kernel: dmaengine: dw-edma: Add spinlock to protect DONE_INT_MASK and ABORT_INT_MASK
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's dmaengine component, specifically in the dw-edma driver. This flaw occurs because the DONE_INT_MASK and ABORT_INT_MASK registers, which are shared by all Direct Memory Access (DMA) channels, are modified using a non-atomic read-modify-write sequence. Concurrent calls to `dw_edma_v0_core_start()` can lead to a race condition if multiple channels attempt to update these registers simultaneously, potentially causing system instability or a denial of service.
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Description OSIDB Bzimport 2026-08-15 06:27:16 UTC 
In the Linux kernel, the following vulnerability has been resolved:

dmaengine: dw-edma: Add spinlock to protect DONE_INT_MASK and ABORT_INT_MASK

The DONE_INT_MASK and ABORT_INT_MASK registers are shared by all DMA
channels, and modifying them requires a read-modify-write sequence.
Because this operation is not atomic, concurrent calls to
dw_edma_v0_core_start() can introduce race conditions if two channels
update these registers simultaneously.

Add a spinlock to serialize access to these registers and prevent race
conditions.

[den: update dw_edma.lock comment]
Comment 1 Keith Grant 2026-08-18 12:49:21 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081533-CVE-2026-72148-bdce@gregkh/T