Denial of Service Vulnerability in OverlayFS Filesystem Implementation in Linux Kernel

CVE-2016-6197 · MEDIUM Severity

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

fs/overlayfs/dir.c in the OverlayFS filesystem implementation in the Linux kernel before 4.6 does not properly verify the upper dentry before proceeding with unlink and rename system-call processing, which allows local users to cause a denial of service (system crash) via a rename system call that specifies a self-hardlink.

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