Bug 2337126 (CVE-2024-50051)

Summary: CVE-2024-50051 kernel: spi: mpc52xx: Add cancel_work_sync before module remove
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-01-11 13:03:21 UTC 
In the Linux kernel, the following vulnerability has been resolved:

spi: mpc52xx: Add cancel_work_sync before module remove

If we remove the module which will call mpc52xx_spi_remove
it will free 'ms' through spi_unregister_controller.
while the work ms->work will be used. The sequence of operations
that may lead to a UAF bug.

Fix it by ensuring that the work is canceled before proceeding with
the cleanup in mpc52xx_spi_remove.
Comment 1 Avinash Hanwate 2025-01-13 06:31:14 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025011122-CVE-2024-50051-d822@gregkh/T