Total vulnerabilities in the database
OpenBSD and NetBSD permit usermode code to kill the display server and write to the X.Org /dev/xf86 device, which allows local users with root privileges to reduce securelevel by replacing the System Management Mode (SMM) handler via a write to an SMRAM address within /dev/xf86 (aka the video card memory-mapped I/O range), and then launching the new handler via a System Management Interrupt (SMI), as demonstrated by a write to Programmed I/O port 0xB2.
| Software | From | Fixed in |
|---|---|---|
| netbsd / netbsd | 2.0.4 | 2.0.4.x |
| openbsd / openbsd | - | - |