CVE-2018-7191 Null dereference in n/a

What is CVE-2018-7191?

CVE-2018-7191 is a medium-severity vulnerability in Linux kernel, published on 17 May 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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.

Weakness: CWE-476

Which versions are affected by CVE-2018-7191?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2018-7191?

Apply the vendor's patch.

Is CVE-2018-7191 being exploited?

There is no known exploitation of CVE-2018-7191 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2018-7191, GHSA-p54q-624c-fr42, UBUNTU-CVE-2018-7191.