The slhc_init function in drivers/net/slip/slhc.c in the Linux kernel through 4.2.3 does not ensure that certain slot numbers are valid, which allows local users to cause a denial of service (NULL pointer dereference and system crash) via a crafted PPPIOCSMAXCID ioctl call.
http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00005.html
http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00018.html
http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00026.html
http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00031.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00015.html
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html
http://lists.opensuse.org/opensuse-updates/2015-12/msg00039.html
http://www.debian.org/security/2015/dsa-3426
http://www.openwall.com/lists/oss-security/2015/10/10/3
http://www.securityfocus.com/bid/77033
http://www.securitytracker.com/id/1033809
http://www.ubuntu.com/usn/USN-2841-1
http://www.ubuntu.com/usn/USN-2841-2
http://www.ubuntu.com/usn/USN-2842-1
http://www.ubuntu.com/usn/USN-2842-2
http://www.ubuntu.com/usn/USN-2843-1
http://www.ubuntu.com/usn/USN-2843-2
http://www.ubuntu.com/usn/USN-2843-3
http://www.ubuntu.com/usn/USN-2844-1
http://www.ubuntu.com/usn/USN-2886-1
Source: MITRE
Published: 2015-10-19
Updated: 2017-03-24
Type: NVD-CWE-Other
Base Score: 4.9
Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C
Impact Score: 6.9
Exploitability Score: 3.9
Severity: MEDIUM