Bug 2426054 (CVE-2023-54204)

Summary: CVE-2023-54204 kernel: mmc: sunplus: fix return value check of mmc_add_host()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2025-12-30 13:05:17 UTC 
In the Linux kernel, the following vulnerability has been resolved:

mmc: sunplus: fix return value check of mmc_add_host()

mmc_add_host() may return error, if we ignore its return value,
1. the memory allocated in mmc_alloc_host() will be leaked
2. null-ptr-deref will happen when calling mmc_remove_host()
in remove function spmmc_drv_remove() because deleting not
added device.

Fix this by checking the return value of mmc_add_host(). Moreover,
I fixed the error handling path of spmmc_drv_probe() to clean up.
Comment 1 Alexander B 2025-12-31 12:28:48 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025123022-CVE-2023-54204-6286@gregkh/T