CVE-2022-50470
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-10-04

Last updated on: 2025-10-06

Assigner: kernel.org

Description
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 list_del corruption kernel crash when unbinding xhci-pci, caused by xhci_mem_cleanup() 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)
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Meta Information
Published
2025-10-04
Last Modified
2025-10-06
Generated
2026-06-16
AI Q&A
2025-10-04
EPSS Evaluated
2026-06-15
NVD
CVE-2022-50470
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
intel panther_point_pch *
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
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Exploitability
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability occurs in the Linux kernel's xHCI (USB 3.0) driver where device endpoints are not properly removed from the bandwidth list when the device is freed. Normally, endpoints are deleted from the bandwidth list when dropped, but if the xHCI host controller is dying or being removed, the cleanup functions return early and do not remove these endpoints correctly. This leads to a list_del corruption kernel crash when unbinding the xhci-pci driver, caused by attempts to delete already freed endpoints from the bandwidth list.

Impact Analysis

This vulnerability can cause a kernel crash due to list corruption when the xHCI host controller is removed or unbound. This can lead to system instability or denial of service on affected systems using the Intel Panther Point PCH (Ivy Bridge) xHCI host controller with software bandwidth checking.

Mitigation Strategies

Apply the Linux kernel update that includes the fix for this vulnerability, which removes device endpoints from the bandwidth list when freeing the device to prevent kernel crashes. This specifically affects hosts using software bandwidth checking, such as xHC in Intel Panther Point PCH (Ivy Bridge).

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