Bug 2401496 (CVE-2023-53567)

Summary: CVE-2023-53567 kernel: spi: qup: Don't skip cleanup in remove's error path
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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An incorrect error handling flaw was found in the Linux kernel's Qualcomm SPI driver in the device removal path. A local privileged user who triggers device removal when the hardware fails to wake can cause DMA resources to leak permanently, as the driver returns early from the cleanup callback without releasing allocated resources. This leads to resource exhaustion and denial of service through repeated device removal operations or system reboot scenarios.
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Description OSIDB Bzimport 2025-10-04 16:03:54 UTC 
In the Linux kernel, the following vulnerability has been resolved:

spi: qup: Don't skip cleanup in remove's error path

Returning early in a platform driver's remove callback is wrong. In this
case the dma resources are not released in the error path. this is never
retried later and so this is a permanent leak. To fix this, only skip
hardware disabling if waking the device fails.
Comment 1 Alexander B 2025-10-06 15:27:32 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025100452-CVE-2023-53567-dedf@gregkh/T