Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 3.16, < 6.1.129 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/0ce5c0dac768be14afe2426101b568a0f66bfc4dMailing ListPatch
- https://git.kernel.org/stable/c/1e0a19912adb68a4b2b74fd77001c96cd83eb073Mailing ListPatch
- https://git.kernel.org/stable/c/4ff18870af793ce2034a6ad746e91d0a3d985b88Mailing ListPatch
- https://git.kernel.org/stable/c/ae069cd2ba09a2bd6a87a68c59ef0b7ea39cd641Mailing ListPatch
- https://git.kernel.org/stable/c/b44253956407046e5907d4d72c8fa5b93ae94485
- https://git.kernel.org/stable/c/b649f0d5bc256f691c7d234c3986685d54053de1Mailing ListPatch
- https://git.kernel.org/stable/c/cf30300a216a4f8dce94e11781a866a09d4b50d4
- https://git.kernel.org/stable/c/fd8bfaeba4a85b14427899adec0efb3954300653
- https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://cert-portal.siemens.com/productcert/html/ssa-503939.html
FAQ
What is CVE-2024-57981?
CVE-2024-57981 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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...
How severe is CVE-2024-57981?
CVE-2024-57981 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2024-57981?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.