An issue was discovered in the Linux kernel before 4.8. Incorrect access checking in overlayfs mounts could be used by local attackers to modify or truncate files in the underlying filesystem.
Exploitability
AV:LAC:LPR:LUI:NScope
S:UImpact
C:NI:HA:N5.5/CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N