CVE-2015-4176

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Summary

CVECVE-2015-4176
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2016-05-02 10:59:13 UTC
Updated2026-05-06 22:30:45 UTC
Descriptionfs/namespace.c in the Linux kernel before 4.0.2 does not properly support mount connectivity, which allows local users to read arbitrary files by leveraging user-namespace root access for deletion of a file or directory.

Risk And Classification

Primary CVSS: v3.0 5.5 MEDIUM from [email protected]

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

Problem Types: CWE-200 | n/a

VersionSourceTypeScoreSeverityVector
3.0[email protected]Primary5.5MEDIUMCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
2.0[email protected]Primary2.1AV:L/AC:L/Au:N/C:N/I:P/A:N

CVSS v3.0 Breakdown

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

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

CVSS v2.0 Breakdown

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

AV:L/AC:L/Au:N/C:N/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
1249442 – (CVE-2015-4176) CVE-2015-4176 kernel:deletion of a file or directory could unmount and reveal data under a mount point. af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com
oss-security - Re: Re: CVE request Linux kernel: ns: user namespaces panic af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
mnt: Update detach_mounts to leave mounts connected · torvalds/linux@e0c9c0a · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Vendor Advisory
www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.2 af854a3a-2127-422b-91ae-364da2661108 www.kernel.org
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