CVE-2026-23009 xhci: sideband: don't dereference freed ring when removing sideband endpoint

In the Linux kernel, the following vulnerability has been resolved: xhci: sideband: don't dereference freed ring when removing sideband endpoint xhcisidebandremoveendpoint incorrecly assumes that the endpoint is running and has a valid transfer ring. Lianqin reported a crash during suspend/wake-u...

CVE-2026-23009

CVE-2026-23009 is a Linux kernel vulnerability in the xHCI sideband code where xhci_sideband_remove_endpoint() could dereference a non-existent transfer ring (ep->ring) during suspend/resume or re-enumeration, risking a crash. The fix adds a guard to only dereference ep->ring if it exists a...