CVE-2012-0044

Un desbordamiento de entero en la función de drm_mode_dirtyfb_ioctl en drivers/gpu/drm/ drm_crtc.c en el subsistema "Direct Rendering Manager" (DRM) en el kernel de Linux en versiones anteriores a la v3.1.5 permite a usuarios locales obtener privilegios o causar una denegación de servicio (por corrupción de memoria) a través de una llamada a ioctl debdamente modificada.

Updates have been made to the Linux kernel. SG_IO ioctl SCSI requests on partitions or LVM volumes could be passed to the underlying block device, allowing a privileged user to bypass restrictions and gain read and write access to the entire block device. A local, unprivileged user could use an integer overflow flaw in drm_mode_dirtyfb_ioctl() to cause a denial of service or escalate their privileges. A local, unprivileged user could use an integer overflow flaw in drm_mode_dirtyfb_ioctl() to cause a denial of service or escalate their privileges. A local, unprivileged user could use a flaw in the Performance Events implementation to cause a denial of service. Various other issues have also been addressed.