Bug 2516658 (CVE-2026-72147)

Summary: CVE-2026-72147 kernel: dmaengine: dw-edma-pcie: Reject devices without driver data
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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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 `dw-edma-pcie` component of the Linux kernel's Direct Memory Access (DMA) engine. This vulnerability occurs because the `dw_edma_pcie_probe()` function attempts to use PCI device ID driver data as a template without verifying its presence. A local attacker, by binding a device dynamically through the `sysfs` interface without the expected driver data, can trigger a NULL pointer dereference. This can lead to a system crash, resulting in a Denial of Service (DoS).
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Description OSIDB Bzimport 2026-08-15 06:24:22 UTC 
In the Linux kernel, the following vulnerability has been resolved:

dmaengine: dw-edma-pcie: Reject devices without driver data

dw_edma_pcie_probe() treats the PCI device ID driver_data as the
template for the controller layout and copies it unconditionally. A
device bound dynamically via sysfs can match the driver without that
data, which leads to a NULL pointer dereference.

Reject such matches before enabling the device.
Comment 1 Keith Grant 2026-08-18 12:45:36 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081533-CVE-2026-72147-7d3c@gregkh/T