Description
In the Linux kernel, the following vulnerability has been resolved: serial: 8250_dw: unregister 8250 port if clk_notifier_register() fails dw8250_probe() registers the 8250 port via serial8250_register_8250_port() and then, if the device has a clock, registers a clock notifier. If clk_notifier_register() fails, probe returns the error but leaves the 8250 port registered. The matching serial8250_unregister_port() lives in dw8250_remove(), which is not called when probe fails, so the port slot stays occupied until the device is rebound or the system is rebooted. The devm-allocated driver data is freed while the port still references it (via the saved private_data and serial_in/serial_out callbacks), so any access to that port slot before a rebind is a use-after-free hazard. Unregister the port on the clk_notifier_register() error path.
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
57f83e5dd6a33c4696699954784f8fee789b1d0c to < ccdf4510a3873b14e5e348cdb038717996f09fdaaffected57f83e5dd6a33c4696699954784f8fee789b1d0c to < 511d2b92f8d20de04acafab676150d26fb5c67f4affected57f83e5dd6a33c4696699954784f8fee789b1d0c to < 07ffe414a708ae60551401cec5d727ed156b8cafaffected57f83e5dd6a33c4696699954784f8fee789b1d0c to < 3d205fe80f2181f0109150ad1fa06ee5bc046935affected57f83e5dd6a33c4696699954784f8fee789b1d0c to < d72650a4f334581b23a1892b888a4cb1be142f76affected57f83e5dd6a33c4696699954784f8fee789b1d0c to < 778b9dda4b24005a27bcd9c35c110bf8d7f259caaffected57f83e5dd6a33c4696699954784f8fee789b1d0c to < 10fc708b4de7f86002d2d735a2dbf3b5b7f65692affected
Linux Linux
Default version status: affected
5.19affected0 to < 5.19unaffected6.1.177 to ≤ 6.1.*unaffected6.6.144 to ≤ 6.6.*unaffected6.12.95 to ≤ 6.12.*unaffected6.18.38 to ≤ 6.18.*unaffected7.0.14 to ≤ 7.0.*unaffected7.1.2 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/ccdf4510a3873b14e5e348cdb038717996f09fda ↗
- https://git.kernel.org/stable/c/511d2b92f8d20de04acafab676150d26fb5c67f4 ↗
- https://git.kernel.org/stable/c/07ffe414a708ae60551401cec5d727ed156b8caf ↗
- https://git.kernel.org/stable/c/3d205fe80f2181f0109150ad1fa06ee5bc046935 ↗
- https://git.kernel.org/stable/c/d72650a4f334581b23a1892b888a4cb1be142f76 ↗
- https://git.kernel.org/stable/c/778b9dda4b24005a27bcd9c35c110bf8d7f259ca ↗
- https://git.kernel.org/stable/c/10fc708b4de7f86002d2d735a2dbf3b5b7f65692 ↗