Some guy named alert7 found an exploit in ioctl_by_bdev() for the 2.6 series:
http://www.x0r.ca/pktcdvd_dos.c
Apparently it works up to and including 2.6.12-rc4.
boo local DOS :( what about priviledge escalation?!
neat, thanks tmp.
Interesting.
I'll have to be upgrading when 2.6.12 comes out (if they patch it)