Description

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

xhci: Fix null pointer dereference when host dies

Make sure xhci_free_dev() and xhci_kill_endpoint_urbs() do not race
and cause null pointer dereference when host suddenly dies.

Usb core may call xhci_free_dev() which frees the xhci->devs[slot_id]
virt device at the same time that xhci_kill_endpoint_urbs() tries to
loop through all the device's endpoints, checking if there are any
cancelled urbs left to give back.

hold the xhci spinlock while freeing the virt device

Classification

CVE ID: CVE-2023-52898

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 5.06% (scored less or equal to compared to others)

EPSS Date: 2025-02-03 (when was this score calculated)

References

https://git.kernel.org/stable/c/6fac4b5cecb3928a0a81069aaa815a2edc8dd5a1
https://git.kernel.org/stable/c/133b902378e4acbd824c29dd0d48570ad596e368
https://git.kernel.org/stable/c/081105213ff6f661c114781d469233c7d0e09c2e
https://git.kernel.org/stable/c/c462ac871f49753eca86bb960f573b993976a5ea
https://git.kernel.org/stable/c/ea2ee5e9991caf74e0604f994c1831a5867055b2
https://git.kernel.org/stable/c/a2bc47c43e70cf904b1af49f76d572326c08bca7

Timeline