CVE-2010-2803

La función drm_ioctl en drivers/gpu/drm/drm_drv.c en el subsistema Direct Rendering Manager (DRM) en el kernel de Linux anterior a v2.6.27.53, v2.6.32.x anterior a v2.6.32.21, v2.6.34.x anterior a v2.6.34.6, y v2.6.35.x anterior a v2.6.35.4, permite a usuarios locales obtener información potencialmente sensible desde la memoria del kernel mediante una petición de reserva de memoria de una cantidad muy elevada.

Gael Delalleu, Rafal Wojtczuk, and Brad Spengler discovered that the memory manager did not properly handle when applications grow stacks into adjacent memory regions. A local attacker could exploit this to gain control of certain applications, potentially leading to privilege escalation, as demonstrated in attacks against the X server. Kees Cook discovered that under certain situations the ioctl subsystem for DRM did not properly sanitize its arguments. A local attacker could exploit this to read previously freed kernel memory, leading to a loss of privacy. Ben Hawkes discovered an integer overflow in the Controller Area Network (CAN) subsystem when setting up frame content and filtering certain messages. An attacker could send specially crafted CAN traffic to crash the system or gain root privileges.