CVE-2017-13166

A bug in the 32-bit compatibility layer of the ioctl handling code of the v4l2 video driver in the Linux kernel has been found. A memory protection mechanism ensuring that user-provided buffers always point to a userspace memory were disabled, allowing destination address to be in a kernel space. This flaw could be exploited by an attacker to overwrite a kernel memory from an unprivileged userspace process, leading to privilege escalation.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

A systemtap script intercepting v4l2_compat_ioctl32() function of the [videodev] module and making it to return -ENOIOCTLCMD error value would work just fine, except breaking all 32bit video capturing software, but not 64bit ones.

Alternatively, blacklisting [videodev] module will work too, but it will break all video capturing software.