National Vulnerability Database

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    Vulnerabilities Detail

CVE-2015-8952 Detail

Description

The mbcache feature in the ext2 and ext4 filesystem implementations in the Linux kernel before 4.6 mishandles xattr block caching, which allows local users to cause a denial of service (soft lockup) via filesystem operations in environments that use many attributes, as demonstrated by Ceph and Samba.

Source:  MITRE
Description Last Modified:  10/16/2016

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 5.5 MEDIUM
Vector: AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H (V3 legend)
Impact Score: 3.6
Exploitability Score: 1.8

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 v2.0 Severity and Metrics:

Base Score: 2.1 LOW
Vector: (AV:L/AC:L/Au:N/C:N/I:N/A:P) (V2 legend)
Impact Subscore: 2.9
Exploitability Subscore: 3.9

Access Vector (AV): Local
Access Complexity (AC): Insufficient_Info
Authentication (AU): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Partial
Additional Information:
Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=82939d7999dfc1f1998c4b1c12e2f19edbdff272 Patch
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=be0726d33cb8f411945884664924bed3cb8c70ee Patch
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f9a61eb4e2471c56a63cd804c7474128138c38ac Patch
http://www.openwall.com/lists/oss-security/2016/08/22/2 Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/08/25/4 Patch Third Party Advisory
https://bugzilla.kernel.org/show_bug.cgi?id=107301 Issue Tracking Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1360968 Issue Tracking Third Party Advisory VDB Entry
https://github.com/torvalds/linux/commit/82939d7999dfc1f1998c4b1c12e2f19edbdff272 Vendor Advisory
https://github.com/torvalds/linux/commit/be0726d33cb8f411945884664924bed3cb8c70ee Issue Tracking Patch
https://github.com/torvalds/linux/commit/f9a61eb4e2471c56a63cd804c7474128138c38ac Issue Tracking
https://lwn.net/Articles/668718/ Third Party Advisory
https://usn.ubuntu.com/3582-1/
https://usn.ubuntu.com/3582-2/

Technical Details

Vulnerability Type (View All)

Change History

4 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2015-8952
NVD Published Date:
10/16/2016
NVD Last Modified:
03/15/2018