CVE-2022-50047

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

net: dsa: mv88e6060: prevent crash on an unused port

If the port isn't a CPU port nor a user port, 'cpu_dp'

is a null pointer and a crash happened on dereferencing

it in mv88e6060_setup_port():

[ 9.575872] Unable to handle kernel NULL pointer dereference at virtual address 00000014

...

[ 9.942216] mv88e6060_setup from dsa_register_switch+0x814/0xe84

[ 9.948616] dsa_register_switch from mdio_probe+0x2c/0x54

[ 9.954433] mdio_probe from really_probe.part.0+0x98/0x2a0

[ 9.960375] really_probe.part.0 from driver_probe_device+0x30/0x10c

[ 9.967029] driver_probe_device from __device_attach_driver+0xb8/0x13c

[ 9.973946] __device_attach_driver from bus_for_each_drv+0x90/0xe0

[ 9.980509] bus_for_each_drv from __device_attach+0x110/0x184

[ 9.986632] __device_attach from bus_probe_device+0x8c/0x94

[ 9.992577] bus_probe_device from deferred_probe_work_func+0x78/0xa8

[ 9.999311] deferred

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References