DEBIAN-CVE-2017-18509

Advisory lineage Upstream: 1 Downstream: 3
Upstream
CVE-2017-18509
Published: 13 Aug 2019, 14:15
Last modified:28 Apr 2026, 20:17

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
3.1 (osv_debian)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

13 Aug 2019, 14:15
Published
Vulnerability first disclosed
28 Apr 2026, 20:17
Last Modified
Vulnerability information updated

Description

An issue was discovered in net/ipv6/ip6mr.c in the Linux kernel before 4.11. By setting a specific socket option, an attacker can control a pointer in kernel land and cause an inet_csk_listen_stop general protection fault, or potentially execute arbitrary code under certain circumstances. The issue can be triggered as root (e.g., inside a default LXC container or with the CAP_NET_ADMIN capability) or after namespace unsharing. This occurs because sk_type and protocol are not checked in the appropriate part of the ip6_mroute_* functions. NOTE: this affects Linux distributions that use 4.9.x longterm kernels before 4.9.187.

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Systems

  • debian•linux

    < 4.11.6-1 | < 4.11.6-1 | < 4.11.6-1 | < 4.11.6-1

References (1)