CVE-2015-4177

5.5 MEDIUM
Published: May 02, 2016 Modified: May 06, 2026
View on NVD

Description

The collect_mounts function in fs/namespace.c in the Linux kernel before 4.0.5 does not properly consider that it may execute after a path has been unmounted, which allows local users to cause a denial of service (system crash) by leveraging user-namespace root access for an MNT_DETACH umount2 system call.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cd4a40174b71acd021877341684d8bb1dc8ea4ae
Source: secalert@redhat.com
Vendor Advisory
http://openwall.com/lists/oss-security/2015/05/29/10
Source: secalert@redhat.com
http://openwall.com/lists/oss-security/2015/05/29/5
Source: secalert@redhat.com
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.5
Source: secalert@redhat.com
http://www.openwall.com/lists/oss-security/2015/06/04/5
Source: secalert@redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=1248486
Source: secalert@redhat.com
https://github.com/torvalds/linux/commit/cd4a40174b71acd021877341684d8bb1dc8ea4ae
Source: secalert@redhat.com
Vendor Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cd4a40174b71acd021877341684d8bb1dc8ea4ae
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
http://openwall.com/lists/oss-security/2015/05/29/10
Source: af854a3a-2127-422b-91ae-364da2661108
http://openwall.com/lists/oss-security/2015/05/29/5
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.5
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.openwall.com/lists/oss-security/2015/06/04/5
Source: af854a3a-2127-422b-91ae-364da2661108
https://bugzilla.redhat.com/show_bug.cgi?id=1248486
Source: af854a3a-2127-422b-91ae-364da2661108
https://github.com/torvalds/linux/commit/cd4a40174b71acd021877341684d8bb1dc8ea4ae
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory

14 reference(s) from NVD

Quick Stats

CVSS v3 Score
5.5 / 10.0
EPSS (Exploit Probability)
0.0%
13th percentile
Exploitation Status
Not in CISA KEV

Affected Vendors

linux