Description
In the Linux kernel, the following vulnerability has been resolved: usb: xhci: Fix NULL pointer dereference on certain command aborts If a command is queued to the final usable TRB of a ring segment, the enqueue pointer is advanced to the subsequent link TRB and no further. If the command is later aborted, when the abort completion is handled the dequeue pointer is advanced to the first TRB of the next segment. If no further commands are queued, xhci_handle_stopped_cmd_ring() sees the ring pointers unequal and assumes that there is a pending command, so it calls xhci_mod_cmd_timer() which crashes if cur_cmd was NULL. Don't attempt timer setup if cur_cmd is NULL. The subsequent doorbell ring likely is unnecessary too, but it's harmless. Leave it alone. This is probably Bug 219532, but no confirmation has been received. The issue has been independently reproduced and confirmed fixed using a USB MCU programmed to NAK the Status stage of SET_ADDRESS forever. Everything continued working normally after several prevented crashes.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
c311e391a7efd101250c0e123286709b7e736249 to < fd8bfaeba4a85b14427899adec0efb3954300653affectedc311e391a7efd101250c0e123286709b7e736249 to < b44253956407046e5907d4d72c8fa5b93ae94485affectedc311e391a7efd101250c0e123286709b7e736249 to < cf30300a216a4f8dce94e11781a866a09d4b50d4affectedc311e391a7efd101250c0e123286709b7e736249 to < 4ff18870af793ce2034a6ad746e91d0a3d985b88affectedc311e391a7efd101250c0e123286709b7e736249 to < b649f0d5bc256f691c7d234c3986685d54053de1affectedc311e391a7efd101250c0e123286709b7e736249 to < ae069cd2ba09a2bd6a87a68c59ef0b7ea39cd641affectedc311e391a7efd101250c0e123286709b7e736249 to < 0ce5c0dac768be14afe2426101b568a0f66bfc4daffectedc311e391a7efd101250c0e123286709b7e736249 to < 1e0a19912adb68a4b2b74fd77001c96cd83eb073affected
Linux Linux
Default version status: affected
3.16affected0 to < 3.16unaffected5.4.291 to ≤ 5.4.*unaffected5.10.235 to ≤ 5.10.*unaffected5.15.179 to ≤ 5.15.*unaffected6.1.129 to ≤ 6.1.*unaffected6.6.76 to ≤ 6.6.*unaffected6.12.13 to ≤ 6.12.*unaffected6.13.2 to ≤ 6.13.*unaffected6.14 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/fd8bfaeba4a85b14427899adec0efb3954300653 ↗
- https://git.kernel.org/stable/c/b44253956407046e5907d4d72c8fa5b93ae94485 ↗
- https://git.kernel.org/stable/c/cf30300a216a4f8dce94e11781a866a09d4b50d4 ↗
- https://git.kernel.org/stable/c/4ff18870af793ce2034a6ad746e91d0a3d985b88 ↗
- https://git.kernel.org/stable/c/b649f0d5bc256f691c7d234c3986685d54053de1 ↗
- https://git.kernel.org/stable/c/ae069cd2ba09a2bd6a87a68c59ef0b7ea39cd641 ↗
- https://git.kernel.org/stable/c/0ce5c0dac768be14afe2426101b568a0f66bfc4d ↗
- https://git.kernel.org/stable/c/1e0a19912adb68a4b2b74fd77001c96cd83eb073 ↗
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html ↗
- https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-503939.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html ↗