CVE-2011-1771

La función cifs_close en fs/cifs/file.c en el kernel de Linux antes de su versión v2.6.39 permite a usuarios locales provocar una denegación de servicio (puntero a NULL y Error) o posiblemente tener un impacto no especificado estableciendo el flag O_DIRECT durante un intento de abrir un archivo en un sistema de archivos CIFS.

The kernel packages contain the Linux kernel, the core of any Linux operating system. An integer underflow flaw, leading to a buffer overflow, was found in the Linux kernel's Datagram Congestion Control Protocol implementation. This could allow a remote attacker to cause a denial of service. Missing sanity checks were found in setup_arg_pages() in the Linux kernel. When making the size of the argument and environment area on the stack very large, it could trigger a BUG_ON(), resulting in a local denial of service. Various other issues were also addressed.