Linux Kernel XFS_IS_REALTIME_INODE Macro Denial of Service Vulnerability

CVE-2017-14340 · MEDIUM Severity

AV:L/AC:L/AU:N/C:N/I:N/A:C

The XFS_IS_REALTIME_INODE macro in fs/xfs/xfs_linux.h in the Linux kernel before 4.13.2 does not verify that a filesystem has a realtime device, which allows local users to cause a denial of service (NULL pointer dereference and OOPS) via vectors related to setting an RHINHERIT flag on a directory.

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