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CVE-2015-4177 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:5.5 MEDIUMVector: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

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URL	Source(s)	Tag(s)
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cd4a40174b71acd021877341684d8bb1dc8ea4ae	CVE	Vendor Advisory
http://openwall.com/lists/oss-security/2015/05/29/10	CVE
http://openwall.com/lists/oss-security/2015/05/29/5	CVE
https://bugzilla.redhat.com/show_bug.cgi?id=1248486	CVE
https://github.com/torvalds/linux/commit/cd4a40174b71acd021877341684d8bb1dc8ea4ae	CVE	Vendor Advisory
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.5	CVE
http://www.openwall.com/lists/oss-security/2015/06/04/5	CVE
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cd4a40174b71acd021877341684d8bb1dc8ea4ae	[email protected]	Vendor Advisory
http://openwall.com/lists/oss-security/2015/05/29/10	[email protected]
http://openwall.com/lists/oss-security/2015/05/29/5	[email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=1248486	[email protected]
https://github.com/torvalds/linux/commit/cd4a40174b71acd021877341684d8bb1dc8ea4ae	[email protected]	Vendor Advisory
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.5	[email protected]
http://www.openwall.com/lists/oss-security/2015/06/04/5	[email protected]

see all 14 references

Weakness Enumeration

CWE-ID	CWE Name	Source
NVD-CWE-Other	Weakness Not in a Standard CWE Category	[email protected]

Affected Products

Product	Versions
linux linux kernel	<= 4.0.4
CPE cpe:2.3:o:linux:linux_kernel:::::::: Remediation No remediation found in references.

Change History

6 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
May 6, 2026	Status Change	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
May 6, 2016	Modified Analysis	[email protected]
May 5, 2016	Initial Analysis	[email protected]