CVE-2016-6197

MEDIUM

Linux kernel <4.6 - DoS

Title source: llm

Description

fs/overlayfs/dir.c in the OverlayFS filesystem implementation in the Linux kernel before 4.6 does not properly verify the upper dentry before proceeding with unlink and rename system-call processing, which allows local users to cause a denial of service (system crash) via a rename system call that specifies a self-hardlink.

References (14)

[Vendor Advisory] http://www.ubuntu.com/usn/USN-3070-2

[Vendor Advisory] http://www.ubuntu.com/usn/USN-3070-3

[Vendor Advisory] http://www.ubuntu.com/usn/USN-3070-4

[Issue Tracking, Patch] http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=11f3710417d026ea2f4fcf362d866342c5274185

[Vendor Advisory] http://rhn.redhat.com/errata/RHSA-2016-1847.html

[Vendor Advisory] http://rhn.redhat.com/errata/RHSA-2016-1875.html

[Mailing List, Third Party Advisory] http://www.openwall.com/lists/oss-security/2016/07/11/8

[Third Party Advisory] http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html

[Vendor Advisory] http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html

[Third Party Advisory, VDB Entry] http://www.securitytracker.com/id/1036273

[Vendor Advisory] http://www.ubuntu.com/usn/USN-3070-1

[Issue Tracking] https://bugzilla.redhat.com/show_bug.cgi?id=1355650

[Issue Tracking, Patch] https://github.com/torvalds/linux/commit/11f3710417d026ea2f4fcf362d866342c5274185

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/91709

Scores

CVSS v3 5.5

EPSS 0.0006

EPSS Percentile 17.2%

Attack Vector LOCAL

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

Classification

CWE

CWE-20

Status draft

Affected Products (3)

oracle/linux

linux/linux_kernel < 4.5.7

oracle/vm_server

Timeline

Published Aug 06, 2016

Tracked Since Feb 18, 2026