CVE-2014-4655

La función snd_ctl_elem_add en sound/core/control.c en la implementación del control ALSA en el kernel de Linux anterior a 3.15.2 no gestiona debidamente el valor user_ctl_count, lo que permite a usuarios locales causar una denegación de servicio (desbordamiento de enteros y evadir el limite) mediante el aprovechamiento de acceso /dev/snd/controlCX para un numero largo de llamadas SNDRV_CTL_IOCTL_ELEM_REPLACE ioctl.

A use-after-free flaw was found in the way the Linux kernel's Advanced Linux Sound Architecture (ALSA) implementation handled user controls. A local, privileged user could use this flaw to crash the system.

A bug was discovered in the handling of pathname components when used with an autofs direct mount. A local user could exploit this flaw to cause a denial of service (system crash) via an open system call. Toralf reported an error in the Linux kernels syscall auditing on 32 bit x86 platforms. A local user could exploit this flaw to cause a denial of service (OOPS and system crash). An information leak was discovered in the control implementation of the Advanced Linux Sound Architecture (ALSA) subsystem in the Linux kernel. A local user could exploit this flaw to obtain sensitive information from kernel memory. Various other issues were also addressed.