CVE-2014-9717

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Summary

CVECVE-2014-9717
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2016-05-02 10:59:06 UTC
Updated2026-05-06 22:30:45 UTC
Descriptionfs/namespace.c in the Linux kernel before 4.0.2 processes MNT_DETACH umount2 system calls without verifying that the MNT_LOCKED flag is unset, which allows local users to bypass intended access restrictions and navigate to filesystem locations beneath a mount by calling umount2 within a user namespace.

Risk And Classification

Primary CVSS: v3.0 6.1 MEDIUM from [email protected]

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

Problem Types: CWE-284 | n/a

VersionSourceTypeScoreSeverityVector
3.0[email protected]Primary6.1MEDIUMCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
2.0[email protected]Primary3.6AV:L/AC:L/Au:N/C:P/I:P/A:N

CVSS v3.0 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
None

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

CVSS v2.0 Breakdown

Access Vector
Local
Access Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
None

AV:L/AC:L/Au:N/C:P/I:P/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
kernel/git/torvalds/linux.git - Linux kernel source tree af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Vendor Advisory
groups.google.com/forum/message/raw af854a3a-2127-422b-91ae-364da2661108 groups.google.com
Linux Kernel CVE-2014-9717 Local Privilege Escalation Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
oss-security - USERNS allows circumventing MNT_LOCKED af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
mnt: Honor MNT_LOCKED when detaching mounts · torvalds/linux@ce07d89 · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Vendor Advisory
[security-announce] SUSE-SU-2016:1696-1: important: Security update for af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org
1226751 – (CVE-2014-9717) CVE-2014-9717 kernel: unsharing MNT_LOCKED mount can expose files beneath the mount. af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com
[security-announce] SUSE-SU-2016:1937-1: important: Security update for af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org
[security-announce] SUSE-SU-2016:1690-1: important: Security update for af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org
Linux Containers: [PATCH review 0/19] Locked mount and loopback mount fixes af854a3a-2127-422b-91ae-364da2661108 www.spinics.net
www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.2 af854a3a-2127-422b-91ae-364da2661108 www.kernel.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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