fs/btrfs/inode.c in the Linux kernel before 4.3.3 mishandles compressed inline extents, which allows local users to obtain sensitive pre-truncation information from a file via a clone action.
Exploitability
AV:LAC:LPR:NUI:NScope
S:UImpact
C:LI:NA:N4/CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N