CVE-2022-50846
mmc: via-sdmmc: fix return value check of mmc_add_host()
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().
INFO
Published Date :
Dec. 30, 2025, 1:15 p.m.
Last Modified :
Dec. 30, 2025, 1:15 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2022-50846
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update the Linux kernel to the latest version.
- Verify the fix is applied in the kernel.
- Test the system for stability after the update.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2022-50846.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2022-50846 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2022-50846
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2022-50846 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2022-50846 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Dec. 30, 2025
Action Type Old Value New Value Added 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(). Added Reference https://git.kernel.org/stable/c/076bcd2c93e16b05c10564e299d6e5d26a766d00 Added Reference https://git.kernel.org/stable/c/0959cc1685eb19774300d43ef25e318b457b156b Added Reference https://git.kernel.org/stable/c/0ec94795114edc7e24ec71849dce42bfa61dafa3 Added Reference https://git.kernel.org/stable/c/12b8e81b77c05c658efd9cde3585bbd65ae39b59 Added Reference https://git.kernel.org/stable/c/63400da6cd37a9793c19bb6aed7131b58b975a04 Added Reference https://git.kernel.org/stable/c/95025a8dd0ec015872f6c16473fe04d6264e68ca Added Reference https://git.kernel.org/stable/c/ba91b413983a9235792523c6b9f7ba2586c4d75d Added Reference https://git.kernel.org/stable/c/e4e46fb61e3bb4628170810d3f2b996b709b90d9 Added Reference https://git.kernel.org/stable/c/f59ef2a47a228e51322ad76752a55a8917c56e38