CVE-2022-50470: xhci: Remove device endpoints from bandwidth list when freeing the device
In the Linux kernel, the following vulnerability has been resolved:
xhci: Remove device endpoints from bandwidth list when freeing the device
Endpoints are normally deleted from the bandwidth list when they are dropped, before the virt device is freed.
If xHC host is dying or being removed then the endpoints aren't dropped cleanly due to functions returning early to avoid interacting with a non-accessible host controller.
So check and delete endpoints that are still on the bandwidth list when freeing the virt device.
Solves a listdel corruption kernel crash when unbinding xhci-pci, caused by xhcimemcleanup() when it later tried to delete already freed endpoints from the bandwidth list.
This only affects hosts that use software bandwidth checking, which currenty is only the xHC in intel Panther Point PCH (Ivy Bridge)
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2022-50470?
CVE-2022-50470 has been classified as a low-severity vulnerability in the Linux kernel.
How do I fix CVE-2022-50470?
To fix CVE-2022-50470, ensure your Linux kernel is updated to the latest version where this vulnerability has been patched.
What types of systems are affected by CVE-2022-50470?
CVE-2022-50470 affects systems running certain versions of the Linux kernel with xHCI host support.
What are the potential impacts of CVE-2022-50470?
The potential impacts of CVE-2022-50470 include instability or malfunctioning of USB device management in affected systems.
Is CVE-2022-50470 being actively exploited?
As of now, there have been no known active exploits publicly reported for CVE-2022-50470.