CVE-2022-49962

Summary

In the Linux kernel, the following vulnerability has been resolved:

xhci: Fix null pointer dereference in remove if xHC has only one roothub

The remove path in xhci platform driver tries to remove and put both main and shared hcds even if only a main hcd exists (one roothub)

This causes a null pointer dereference in reboot for those controllers.

Check that the shared_hcd exists before trying to remove it.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxe0fe986972f5b6b12086c73569206dd29c520be9 < 7081b2f34ff291ada012bd6abacaf7d51c4cf73faffected
LinuxLinuxe0fe986972f5b6b12086c73569206dd29c520be9 < 4a593a62a9e3a25ab4bc37f612e4edec144f7f43affected
LinuxLinux5.19affected
LinuxLinux0 < 5.19unaffected
LinuxLinux5.19.8 <= 5.19.*unaffected
LinuxLinux6.0 <= *unaffected

Weaknesses

References