Bug 2396104 (CVE-2022-50353)

Summary: CVE-2022-50353 kernel: mmc: wmt-sdmmc: 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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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-09-17 15:01:34 UTC 
In the Linux kernel, the following vulnerability has been resolved:

mmc: wmt-sdmmc: fix return value check of mmc_add_host()

mmc_add_host() may return error, if we ignore its return value, the memory
that allocated in mmc_alloc_host() will be leaked and it will lead a kernel
crash because of deleting not added device in the remove path.

So fix this by checking the return value and goto error path which will call
mmc_free_host(), besides, clk_disable_unprepare() also needs be called.
Comment 1 Keith Grant 2025-09-17 17:21:49 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025091711-CVE-2022-50353-2f1e@gregkh/T