CVE-2016-6213

MEDIUM

Linux kernel <4.9 - DoS

Title source: llm

Description

fs/namespace.c in the Linux kernel before 4.9 does not restrict how many mounts may exist in a mount namespace, which allows local users to cause a denial of service (memory consumption and deadlock) via MS_BIND mount system calls, as demonstrated by a loop that triggers exponential growth in the number of mounts.

References (7)

[Patch, Vendor Advisory] http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d29216842a85c7970c536108e093963f02714498

[Mailing List] http://www.openwall.com/lists/oss-security/2016/07/13/8

[Vendor Advisory] https://access.redhat.com/errata/RHSA-2017:1842

[Vendor Advisory] https://access.redhat.com/errata/RHSA-2017:2077

[Issue Tracking] https://bugzilla.redhat.com/show_bug.cgi?id=1356471

[Patch] https://github.com/torvalds/linux/commit/d29216842a85c7970c536108e093963f02714498

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/91754

Scores

CVSS v3 4.7

EPSS 0.0004

EPSS Percentile 11.6%

Attack Vector LOCAL

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

Classification

CWE

CWE-400

Status published

Affected Products (2)

linux/linux_kernel < 4.8.15

n/a/n/a

Timeline

Published Dec 28, 2016

Tracked Since Feb 18, 2026