CVE-2022-50653 Details
Description
In the Linux kernel, the following vulnerability has been resolved: mmc: atmel-mci: 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(). So fix this by checking the return value and calling mmc_free_host() in the error path.
A vulnerability exists in the Linux kernel's Atmel MultiMediaCard Interface (MMC) driver. The issue arises because the function 'mmc_add_host()' can return an error, and if this return value is ignored, it leads to two problems: first, memory allocated by 'mmc_alloc_host()' is leaked; second, during the removal process, 'mmc_remove_host()' is called to delete a device that was never added, causing a kernel crash due to a null pointer dereference in 'device_del()'. This vulnerability affects the Linux kernel stable tree.
The vulnerability has been addressed by modifying the Atmel-MCI driver to check the return value of 'mmc_add_host()' and to free the allocated memory using 'mmc_free_host()' if an error occurs. Users should update to the latest version of the Linux kernel where this fix has been applied.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Dec 9, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/00ac0f5f95920f003cd6ece53cdc759549b69118 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/1925472dec31ec061d57412b3a65a056ea24f340 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/6bb26abb92f25e582a0976091a10b539fe3796db | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/85946ceb0fac20ab39cdb85333086daf0291a553 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/99a6cdfa2cf05028b52f6d8ee85ccc5f8b71b4a2 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/9e6e8c43726673ca2abcaac87640b9215fd72f4c | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/cc8bb436f3c842a86b9082d97933582120d180e2 | kernel.org | Source CodeVendor |
Weakness Enumeration
No weakness enumeration is available for this CVE.
Affected Products
| Product | Versions |
|---|---|
| Linux kernel | All versions |
CPE
Remediation
| |
| Atmel MCI | All versions |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Dec 9, 2025 | New CVE Received | kernel.org |