CVE-2022-50618
mmc: meson-gx: fix return value check of mmc_add_host()
Description
In the Linux kernel, the following vulnerability has been resolved: mmc: meson-gx: 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. 8, 2025, 2:15 a.m.
Last Modified :
Dec. 8, 2025, 2:15 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Apply the patch to check mmc_add_host() return value.
- Ensure mmc_free_host() is called on error.
- Fix memory leaks by proper error handling.
- Prevent null-ptr-deref in remove path.
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-2022-50618.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2022-50618 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-2022-50618
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).
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CVE-2022-50618 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2022-50618 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. 08, 2025
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: mmc: meson-gx: 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/42343e3c6195e934b9cb4c08b7ff84a3778d77f9 Added Reference https://git.kernel.org/stable/c/64b2c441171febf075bd9632aca579afda8ab9fb Added Reference https://git.kernel.org/stable/c/90935f16f2650ab7416fa2ffbe5c28cb39cf3f1e Added Reference https://git.kernel.org/stable/c/9e11c6bb745be4e9b325cf96031b4ea34801342d Added Reference https://git.kernel.org/stable/c/e0cfe7aa41f3965f5224affd88afd48c60f6ad1f Added Reference https://git.kernel.org/stable/c/f5506e0bbb25102bd8ef2e1a3b483a0b934e454e Added Reference https://git.kernel.org/stable/c/f5ce76aeddf01ca8f2a80fc37119388d59db7c10