A flaw was found in the Linux 4.x kernel's implementation of 32-bit syscall interface for bridging. This allowed a privileged user to arbitrarily write to a limited range of kernel memory.
Exploitability
AV:LAC:LPR:HUI:NScope
S:UImpact
C:HI:HA:H6.7/CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:HMemory Safety