CVE-2017-18509

kernel: not checking sk_type and protocol in net/ipv6/ip6mr.c leads to general protection fault, or arbitrary code execution

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Severity

Important

Red Hat Product Security

7.2

CVSS 3.0

Review impact separately from score.

Published · August 20, 2019

Updated · June 28, 2026

Description

A flaw was found in the Linux kernel’s net/ipv6/ip6mr.c function where setting a specific socket option can cause an inet_csk_listen_stop general protection fault. An attacker with CAP_NET_ADMIN style privileges inside a container, can crash the system or execute arbitrary code when issuing a specially crafted call to configure ipv6 multicast routing.

Statement

At this time none of the Red Hat Enterprse Linux shipping releases are vulnerable to the described flaw.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.0 · 7.2
CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CWE-843 · Access of Resource Using Incompatible Type ('Type Confusion')