Description
In the Linux kernel, the following vulnerability has been resolved:
serial: core: clear freed pointers on uart_register_driver() failure
uart_register_driver() leaves drv->state pointing to freed memory when tty_alloc_driver() fails. If tty_register_driver() fails, drv->tty_driver also retains a pointer after its reference is dropped.
Drivers that use drv->state as an "already registered" flag can then skip registration on the next probe and pass the freed state to uart_add_one_port().
This issue was found with failslab on QEMU's raspi1ap board by failing registration and binding the PL011 port again.
Clear both pointers on their failure paths, as uart_unregister_driver() already does.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 5e260edd28eddc3b92c9f578df3026fd11c710cf; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < a9c0ffe5930c97b352f32febfc59a6e6ae6772ee; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 802e2192a9d38027730c2869c67c9131b8c8fe9f; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < ddf51d74ee9f9857c99477329d80408cedebda61; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 06b376432974fe5f25f2843a8e8438c6a1cf3d50; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 61a2fb25551be0375bc16ef2a70c987dfca26183 |
| Linux | Linux | 2.6.12 |
References
- https://git.kernel.org/stable/c/06b376432974fe5f25f2843a8e8438c6a1cf3d50
- https://git.kernel.org/stable/c/5e260edd28eddc3b92c9f578df3026fd11c710cf
- https://git.kernel.org/stable/c/61a2fb25551be0375bc16ef2a70c987dfca26183
- https://git.kernel.org/stable/c/802e2192a9d38027730c2869c67c9131b8c8fe9f
- https://git.kernel.org/stable/c/a9c0ffe5930c97b352f32febfc59a6e6ae6772ee
- https://git.kernel.org/stable/c/ddf51d74ee9f9857c99477329d80408cedebda61
Timeline
- Published
- Sep 17, 2026
- Last modified
- Oct 30, 2026
- NVD status
- Received