Race condition in net/packet/af_packet.c in the Linux kernel before 4.9.13 allows local users to cause a denial of service (use-after-free) or possibly have unspecified other impact via a multithreaded application that makes PACKET_FANOUT setsockopt system calls.
http://www.debian.org/security/2017/dsa-3804
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.13
http://www.openwall.com/lists/oss-security/2017/02/28/6
http://www.securityfocus.com/bid/96508
https://github.com/torvalds/linux/commit/d199fab63c11998a602205f7ee7ff7c05c97164b
Source: MITRE
Published: 2017-03-01
Updated: 2017-11-04
Type: CWE-362
Base Score: 6.9
Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C
Impact Score: 10
Exploitability Score: 3.4
Severity: MEDIUM
Base Score: 7
Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 1
Severity: HIGH