CVE-2022-50251
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-09-15

Last updated on: 2025-11-26

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: mmc: vub300: fix return value check of mmc_add_host() mmc_add_host() may return error, if we ignore its return value, the memory that allocated in mmc_alloc_host() will be leaked and it will lead a kernel crash because of deleting not added device in the remove path. So fix this by checking the return value and goto error path which will call mmc_free_host(), besides, the timer added before mmc_add_host() needs be del. And this patch fixes another missing call mmc_free_host() if usb_control_msg() fails.
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Meta Information
Published
2025-09-15
Last Modified
2025-11-26
Generated
2026-06-16
AI Q&A
2025-09-15
EPSS Evaluated
2026-06-15
NVD
CVE-2022-50251
Affected Vendors & Products
Showing 8 associated CPEs
Vendor Product Version / Range
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-401 The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.
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Executive Summary

This vulnerability in the Linux kernel's mmc subsystem involves improper handling of the return value from the function mmc_add_host(). If the return value is ignored, memory allocated by mmc_alloc_host() is leaked, which can lead to a kernel crash when the system attempts to delete a device that was never properly added. The fix involves checking the return value of mmc_add_host() and properly freeing allocated memory if an error occurs, as well as ensuring timers are correctly deleted and handling failures from usb_control_msg() by freeing allocated memory.

Impact Analysis

This vulnerability can lead to memory leaks and potentially cause the Linux kernel to crash. A kernel crash can result in system instability, downtime, and potential loss of data or service availability.

Mitigation Strategies

To mitigate this vulnerability, update the Linux kernel to a version that includes the patch fixing the mmc_add_host() return value check in the vub300 driver. This patch ensures proper error handling and prevents memory leaks and kernel crashes related to the mmc subsystem.

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