Denial of Service Vulnerability in Linux Kernel's TUN Subsystem

CVE-2018-7191 · MEDIUM Severity

AV:L/AC:L/AU:N/C:N/I:N/A:C

In the tun subsystem in the Linux kernel before 4.13.14, dev_get_valid_name is not called before register_netdevice. This allows local users to cause a denial of service (NULL pointer dereference and panic) via an ioctl(TUNSETIFF) call with a dev name containing a / character. This is similar to CVE-2013-4343.

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