CVE-2018-7740

La función resv_map_release en mm/hugetlb.c en el kernel de Linux hasta la versión 4.15.7 permite que usuarios locales provoquen una denegación de servicio (error) mediante una aplicación manipulada que realiza llamadas del sistema mmap y tiene un argumento grande pgoff en la llamada del sistema remap_file_pages.

The resv_map_release function in mm/hugetlb.c in the Linux kernel, through 4.15.7, allows local users to cause a denial of service (BUG) via a crafted application that makes mmap system calls and has a large pgoff argument to the remap_file_pages system call.

It was discovered that the f2fs filesystem implementation in the Linux kernel did not handle the noflush_merge mount option correctly. An attacker could use this to cause a denial of service. It was discovered that the procfs filesystem did not properly handle processes mapping some memory elements onto files. A local attacker could use this to block utilities that examine the procfs filesystem to report operating system state, such as ps. Various other issues were also addressed.