Direct Rendering Manager (DRM) driver in Linux kernel 2.6 does not properly check the DMA lock, which could allow remote attackers or local users to cause a denial of service (X Server crash) and possibly modify the video output.
Exploitability
AV:NAC:LAu:NImpact
C:NI:PA:P6.4/AV:N/AC:L/Au:N/C:N/I:P/A:P