Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: xhci: Fix NULL pointer dereference when reading portli debugfs files Michal reported and debgged a NULL pointer dereference bug in the recently added portli debugfs files Oops is caused when there are more port registers counted in xhci->max_ports than ports reported by Supported Protocol capabilities. This is possible if max_ports is more than maximum port number, or if there are gaps between ports of different speeds the 'Supported Protocol' capabilities. In such cases port->rhub will be NULL so we can't reach xhci behind it. Add an explicit NULL check for this case, and print portli in hex without dereferencing port->rhub.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 384c57ec720597f8104f69082cdd261abb998b80 before 9c8bef223c6e991276188d30d74bdb2cbd8be652; affected 384c57ec720597f8104f69082cdd261abb998b80 before ae4ff9dead5efa2025eddfcdb29411432bf40a7c |
| Linux / Linux | affected 6.19; unaffected 0 before 6.19; unaffected 6.19.9 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.