Description
In the Linux kernel, the following vulnerability has been resolved:
USB: serial: fix port tear down use-after-free
Some drivers for multiport devices access port driver data from completion handlers of shared URBs submitted at attach() or first open() and stopped at disconnect() or last close(), respectively.
A simple NULL check before accessing the driver data makes sure that a port state container has at least been allocated, but a completion handler can still race with port tear down.
Reorder the disconnect handling so that ports are not deregistered (and their driver data freed) until after all ports have been hung up and the driver disconnect() callback has run so that all I/O has been stopped.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 2d93148ab6988cad872e65d694c95e8944e1b626, < e4a6883ad9b4686a5f4bd90ff55a44d7ab65bd3c; >= 2d93148ab6988cad872e65d694c95e8944e1b626, < 60cc9379c3e650d1ebfba4de63f1242537a62a32; >= 2d93148ab6988cad872e65d694c95e8944e1b626, < 5e8980a81af195c49084be5b4c031085b56c7443; >= 2d93148ab6988cad872e65d694c95e8944e1b626, < e80ee74206f260eb1282e7d1339ff146a4a410d0; >= 2d93148ab6988cad872e65d694c95e8944e1b626, < 33c920f7c5952dfc42d1b8ea6efe16b1f0bb0c5b |
| Linux | Linux | 2.6.30 |
References
- https://git.kernel.org/stable/c/33c920f7c5952dfc42d1b8ea6efe16b1f0bb0c5b
- https://git.kernel.org/stable/c/5e8980a81af195c49084be5b4c031085b56c7443
- https://git.kernel.org/stable/c/60cc9379c3e650d1ebfba4de63f1242537a62a32
- https://git.kernel.org/stable/c/e4a6883ad9b4686a5f4bd90ff55a44d7ab65bd3c
- https://git.kernel.org/stable/c/e80ee74206f260eb1282e7d1339ff146a4a410d0
Timeline
- Published
- Oct 18, 2026
- Last modified
- Oct 21, 2026
- NVD status
- Received