Bug 2422764 (CVE-2025-68238)

Summary: CVE-2025-68238 kernel: mtd: rawnand: cadence: fix DMA device NULL pointer dereference
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-12-16 15:03:01 UTC 
In the Linux kernel, the following vulnerability has been resolved:

mtd: rawnand: cadence: fix DMA device NULL pointer dereference

The DMA device pointer `dma_dev` was being dereferenced before ensuring
that `cdns_ctrl->dmac` is properly initialized.

Move the assignment of `dma_dev` after successfully acquiring the DMA
channel to ensure the pointer is valid before use.
Comment 1 Alexander B 2025-12-16 21:56:05 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025121635-CVE-2025-68238-fd37@gregkh/T