CVE-2022-50846

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

State: Published
Severity: Not scored
Published: Dec 30, 2025
Updated: May 11, 2026
Reserved: Dec 30, 2025

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().

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	f0bf7f61b8405224bc52fc9a3ccd167a68126e00 to before 076bcd2c93e16b05c10564e299d6e5d26a766d00Affected f0bf7f61b8405224bc52fc9a3ccd167a68126e00 to before 12b8e81b77c05c658efd9cde3585bbd65ae39b59Affected f0bf7f61b8405224bc52fc9a3ccd167a68126e00 to before 95025a8dd0ec015872f6c16473fe04d6264e68caAffected f0bf7f61b8405224bc52fc9a3ccd167a68126e00 to before f59ef2a47a228e51322ad76752a55a8917c56e38Affected f0bf7f61b8405224bc52fc9a3ccd167a68126e00 to before 63400da6cd37a9793c19bb6aed7131b58b975a04Affected f0bf7f61b8405224bc52fc9a3ccd167a68126e00 to before 0959cc1685eb19774300d43ef25e318b457b156bAffected f0bf7f61b8405224bc52fc9a3ccd167a68126e00 to before 0ec94795114edc7e24ec71849dce42bfa61dafa3Affected f0bf7f61b8405224bc52fc9a3ccd167a68126e00 to before ba91b413983a9235792523c6b9f7ba2586c4d75dAffected f0bf7f61b8405224bc52fc9a3ccd167a68126e00 to before e4e46fb61e3bb4628170810d3f2b996b709b90d9Affected
LinuxLinux	2.6.31Affected before 2.6.31Not affected 4.9.337 through 4.9.Not affected 4.14.303 through 4.14.Not affected 4.19.270 through 4.19.Not affected 5.4.229 through 5.4.Not affected 5.10.163 through 5.10.Not affected 5.15.86 through 5.15.Not affected 6.0.16 through 6.0.Not affected 6.1.2 through 6.1.Not affected 6.2 and laterNot affected

Product

Versions

LinuxLinux

f0bf7f61b8405224bc52fc9a3ccd167a68126e00 to before 076bcd2c93e16b05c10564e299d6e5d26a766d00Affected
f0bf7f61b8405224bc52fc9a3ccd167a68126e00 to before 12b8e81b77c05c658efd9cde3585bbd65ae39b59Affected
f0bf7f61b8405224bc52fc9a3ccd167a68126e00 to before 95025a8dd0ec015872f6c16473fe04d6264e68caAffected
f0bf7f61b8405224bc52fc9a3ccd167a68126e00 to before f59ef2a47a228e51322ad76752a55a8917c56e38Affected
f0bf7f61b8405224bc52fc9a3ccd167a68126e00 to before 63400da6cd37a9793c19bb6aed7131b58b975a04Affected
f0bf7f61b8405224bc52fc9a3ccd167a68126e00 to before 0959cc1685eb19774300d43ef25e318b457b156bAffected
f0bf7f61b8405224bc52fc9a3ccd167a68126e00 to before 0ec94795114edc7e24ec71849dce42bfa61dafa3Affected
f0bf7f61b8405224bc52fc9a3ccd167a68126e00 to before ba91b413983a9235792523c6b9f7ba2586c4d75dAffected
f0bf7f61b8405224bc52fc9a3ccd167a68126e00 to before e4e46fb61e3bb4628170810d3f2b996b709b90d9Affected

LinuxLinux

2.6.31Affected
before 2.6.31Not affected
4.9.337 through 4.9.*Not affected
4.14.303 through 4.14.*Not affected
4.19.270 through 4.19.*Not affected
5.4.229 through 5.4.*Not affected
5.10.163 through 5.10.*Not affected
5.15.86 through 5.15.*Not affected
6.0.16 through 6.0.*Not affected
6.1.2 through 6.1.*Not affected
6.2 and laterNot affected

References

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