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Vulnerability record · CVE-2016-6198 · published 6 August 2016

CVE-2016-6198: Linux kernel improper access control vulnerability

Linux · Linux Kernel

The filesystem layer in the Linux kernel before 4.5.5 proceeds with post-rename operations after an OverlayFS file is renamed to a self-hardlink, which allows local users to cause a denial of service (system crash) via a rename system call, related to fs/namei.c and fs/open.c.

5.5 CVSS 3.0 Medium EPSS 0.64% · top 51.5% CWE-284 · Improper access control
5.5CVSS 3.0 base score, v2 4.9
0.64%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
30References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

The filesystem layer in the Linux kernel before 4.5.5 proceeds with post-rename operations after an OverlayFS file is renamed to a self-hardlink, which allows local users to cause a denial of service (system crash) via a rename system call, related to fs/namei.c and fs/open.c.

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

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=54d5ca871e72f2bb172ec9323497f01cd5091ec7 Issue TrackingPatch
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9409e22acdfc9153f88d9b1ed2bd2a5b34d2d3ca Issue TrackingPatch
http://rhn.redhat.com/errata/RHSA-2016-1847.html
http://rhn.redhat.com/errata/RHSA-2016-1875.html
http://rhn.redhat.com/errata/RHSA-2016-2574.html
http://rhn.redhat.com/errata/RHSA-2016-2584.html
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5 Release Notes
http://www.openwall.com/lists/oss-security/2016/07/11/8 ExploitMailing ListThird Party Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html Third Party Advisory
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html Vendor Advisory
http://www.securityfocus.com/bid/91709
http://www.securitytracker.com/id/1036273
https://bugzilla.redhat.com/show_bug.cgi?id=1355654 Issue Tracking
https://github.com/torvalds/linux/commit/54d5ca871e72f2bb172ec9323497f01cd5091ec7 Issue TrackingPatch
https://github.com/torvalds/linux/commit/9409e22acdfc9153f88d9b1ed2bd2a5b34d2d3ca Issue TrackingPatch
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=54d5ca871e72f2bb172ec9323497f01cd5091ec7 Issue TrackingPatch
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9409e22acdfc9153f88d9b1ed2bd2a5b34d2d3ca Issue TrackingPatch
http://rhn.redhat.com/errata/RHSA-2016-1847.html
http://rhn.redhat.com/errata/RHSA-2016-1875.html
http://rhn.redhat.com/errata/RHSA-2016-2574.html
http://rhn.redhat.com/errata/RHSA-2016-2584.html
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5 Release Notes
http://www.openwall.com/lists/oss-security/2016/07/11/8 ExploitMailing ListThird Party Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html Third Party Advisory
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html Vendor Advisory
http://www.securityfocus.com/bid/91709
http://www.securitytracker.com/id/1036273
https://bugzilla.redhat.com/show_bug.cgi?id=1355654 Issue Tracking
https://github.com/torvalds/linux/commit/54d5ca871e72f2bb172ec9323497f01cd5091ec7 Issue TrackingPatch
https://github.com/torvalds/linux/commit/9409e22acdfc9153f88d9b1ed2bd2a5b34d2d3ca Issue TrackingPatch

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Source: NIST National Vulnerability Database (record CVE-2016-6198), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.