CVE-2026-90336

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.

CVSS

No CVSS.

References

Link	Resource
https://git.kernel.org/stable/c/06b376432974fe5f25f2843a8e8438c6a1cf3d50
https://git.kernel.org/stable/c/61a2fb25551be0375bc16ef2a70c987dfca26183

Configurations

No configuration.

History

17 Sep 2026, 17:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-17 17:17

Updated : 2026-09-17 17:17

NVD link : CVE-2026-90336

Mitre link : CVE-2026-90336

CVE.ORG link : CVE-2026-90336

JSON object : View

Products Affected

No product.

CWE

No CWE.

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