Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: serial: core: fix NULL pointer dereference in serial_core_unregister_port() port->port_dev is NULL when no port device is installed: it is cleared on teardown, and never set if registration failed before serial_core_port_device_add(). serial_core_unregister_port() passes it straight to serial_core_get_ctrl_dev(), which dereferences it: KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047] RIP: serial_core_unregister_port Call Trace: serial8250_unregister_port serial8250_remove unbind_store Return early when there is no port device, and read port->port_dev under port_mutex. Also clear port->port_dev on the serial_core_register_port() error path, where the port device has already been removed.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 84a9582fd203063cd4d301204971ff2cd8327f1a before 54abbb862366dcaf1f22f1e968358147b7d0547d; affected 84a9582fd203063cd4d301204971ff2cd8327f1a before 499485a67fbacf4d9afbdb43522388c64f853428 |
| Linux / Linux | affected 6.5; unaffected 0 before 6.5; unaffected 7.2.10 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.