CVE-2022-50251
mmc: vub300: fix return value check of mmc_add_host()
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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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/0613ad2401f88bdeae5594c30afe318e93b14676
- https://git.kernel.org/stable/c/2044b2ea77945f372ef161d1bbf814e471767ff2
- https://git.kernel.org/stable/c/25f05d762ca5e1c685002a53dd44f68e78ca3feb
- https://git.kernel.org/stable/c/3049a3b927a40d89d4582ff1033cd7953be773c7
- https://git.kernel.org/stable/c/3b29f8769d32016b2d89183db4d80c7a71b7e35e
References (9)
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
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