CVE-2022-50653
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-09

Last updated on: 2025-12-09

Assigner: kernel.org

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.
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Meta Information
Published
2025-12-09
Last Modified
2025-12-09
Generated
2026-06-16
AI Q&A
2025-12-09
EPSS Evaluated
2026-06-14
NVD
CVE-2022-50653
EUVD
EUVD-2022-55703
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability is in the Linux kernel's atmel-mci driver related to the function mmc_add_host(). The function mmc_add_host() may return an error, but if this return value is ignored, it can cause two problems: first, memory allocated by mmc_alloc_host() is leaked; second, during device removal, mmc_remove_host() is called on a device that was never successfully added, leading to a kernel crash due to a null pointer dereference in device_del(). The fix involves properly checking the return value of mmc_add_host() and freeing the allocated memory if an error occurs.

Impact Analysis

This vulnerability can lead to memory leaks and kernel crashes on systems using the affected Linux kernel with the atmel-mci driver. A kernel crash can cause system instability, downtime, and potential data loss or corruption. Memory leaks may degrade system performance over time.

Mitigation Strategies

To mitigate this vulnerability, update the Linux kernel to a version where the mmc: atmel-mci driver properly checks the return value of mmc_add_host() and frees allocated memory on error paths. This prevents memory leaks and kernel crashes due to null pointer dereferences. Until an update is applied, avoid using vulnerable versions of the kernel with the affected driver.

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