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CVE-2015-4178

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Date: May 2, 2016

The fs_pin implementation in the Linux kernel before 4.0.5 does not ensure the internal consistency of a certain list data structure, 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, related to fs/fs_pin.c and include/linux/fs_pin.h.

Language: C

Severity Score

Related Resources (9)

http://openwall.com/lists/oss-security/2015/05/29/5
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.5
https://nvd.nist.gov/vuln/detail/CVE-2015-4178
http://www.openwall.com/lists/oss-security/2015/06/04/5
https://github.com/torvalds/linux/commit/820f9f147dcce2602eefd9b575bbbd9ea14f0953
http://openwall.com/lists/oss-security/2015/05/29/10
https://bugzilla.redhat.com/show_bug.cgi?id=1249849
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=820f9f147dcce2602eefd9b575bbbd9ea14f0953
https://www.mend.io/vulnerability-database/CVE-2015-4178

Severity Score

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CVSS v3

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): COMPLETE
Additional information:

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