cve/2016/CVE-2016-6197.md

CVE-2016-6197

Description

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.

POC

Reference

• http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
• http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html

Github

No PoCs found on GitHub currently.