CVE-2022-50846
Published Dec 30, 2025
Modified Apr 15, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: mmc: via-sdmmc: fix return value check of mmc_add_host() mmc_add_host() may return error, if we ignore its return value, it will lead two issues: 1. The memory that allocated in mmc_alloc_host() is leaked. 2. In the remove() path, mmc_remove_host() will be called to delete device, but it's not added yet, it will lead a kernel crash because of null-ptr-deref in device_del(). Fix this by checking the return value and goto error path which will call mmc_free_host().
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References
Other References
https://git.kernel.org/stable/c/076bcd2c93e16b05c10564e299d6e5d26a766d00
https://git.kernel.org/stable/c/0959cc1685eb19774300d43ef25e318b457b156b
https://git.kernel.org/stable/c/0ec94795114edc7e24ec71849dce42bfa61dafa3
https://git.kernel.org/stable/c/12b8e81b77c05c658efd9cde3585bbd65ae39b59
https://git.kernel.org/stable/c/63400da6cd37a9793c19bb6aed7131b58b975a04
https://git.kernel.org/stable/c/95025a8dd0ec015872f6c16473fe04d6264e68ca
https://git.kernel.org/stable/c/ba91b413983a9235792523c6b9f7ba2586c4d75d
https://git.kernel.org/stable/c/e4e46fb61e3bb4628170810d3f2b996b709b90d9
https://git.kernel.org/stable/c/f59ef2a47a228e51322ad76752a55a8917c56e38
Frequently Asked Questions
What is CVE-2022-50846? +
In the Linux kernel, the following vulnerability has been resolved:
mmc: via-sdmmc: fix return value check of mmc_add_host()
mmc_add_host() may return error, if we ignore its return value,
it will lead two issues:
1. The memory that allocated in mmc_alloc_host() is leaked.
2. In the remove() path, mmc_remove_host() will be called to
delete device, but it's not added yet, it will lead a kernel
crash because of null-ptr-deref in device_del().
Fix this by checking the return value and goto error path which
will call mmc_free_host().
How do I check if I'm vulnerable to CVE-2022-50846? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.