Bug 2395843 (CVE-2022-50347)

Summary: CVE-2022-50347 kernel: mmc: rtsx_usb_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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OS: Linux   
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Description OSIDB Bzimport 2025-09-16 17:01:24 UTC 
In the Linux kernel, the following vulnerability has been resolved:

mmc: rtsx_usb_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 calling mmc_free_host() in the
error path, besides, led_classdev_unregister() and pm_runtime_disable() also
need be called.
Comment 1 Keith Grant 2025-09-16 18:44:40 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025091640-CVE-2022-50347-33c3@gregkh/T