CVE-2015-7509

fs/ext4/namei.c en el kernel Linux en versiones anteriores a 3.7 permite a atacantes físicamente próximos provocar una denegación de servicio (caída del sistema) a través de un archivo de sistema no-journal manipulado, un problema relacionado con CVE-2013-2015.

A flaw was found in the way the Linux kernel's ext4 file system driver handled non-journal file systems with an orphan list. An attacker with physical access to the system could use this flaw to crash the system or, although unlikely, escalate their privileges on the system.

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix: It was found that reporting emulation failures to user space could lead to either a local or a L2->L1 denial of service. In the case of a local denial of service, an attacker must have access to the MMIO area or be able to access an I/O port. Please note that on certain systems, HPET is mapped to userspace as part of vdso and thus an unprivileged user may generate MMIO transactions this way.