kernel: vfs: missing detection of hardlinks in vfs_rename() on overlayfs
Published Aug 6, 2016
5.5
MEDIUMCVSS 3.0
EPSS 0.64%
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.
Affected products
No data.
No data.
Red Hat Enterprise Linux 7
kernel-0:3.10.0-327.36.1.el7
Fixed · RHSA-2016:1847
Red Hat Enterprise Linux 7
kernel-0:3.10.0-514.el7
Fixed · RHSA-2016:2574
Red Hat Enterprise Linux 7
kernel-rt-0:3.10.0-327.36.1.rt56.237.el7
Fixed · RHSA-2016:1875
Red Hat Enterprise Linux 7
kernel-rt-0:3.10.0-514.rt56.420.el7
Fixed · RHSA-2016:2584
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise MRG 2
realtime-kernel
Affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-327.36.1.el7 | Fixed | RHSA-2016:1847 |
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-514.el7 | Fixed | RHSA-2016:2574 |
| Red Hat Enterprise Linux 7 | kernel-rt-0:3.10.0-327.36.1.rt56.237.el7 | Fixed | RHSA-2016:1875 |
| Red Hat Enterprise Linux 7 | kernel-rt-0:3.10.0-514.rt56.420.el7 | Fixed | RHSA-2016:2584 |
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise MRG 2 | realtime-kernel | Affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue is not present in the Linux kernel packages as shipped with Red Hat Enterprise Linux versions 5 and 6. This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 7 and MRG-2. Future Linux kernel updates for the respective releases may address this issue.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AV:L/AC:L/Au:N/C:N/I:N/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.64% (0.00637) | 48.65th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.62% (0.00619) | 44.73th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.03% (0.00027) | 4.69th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00044) | 11.89th | v3 (v2023.03.01) |
| Jul 2, 2024 | 0.04% (0.00044) | 10.25th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00044) | 8.24th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.55% (0.01547) | 74.98th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.55% (0.01547) | 74.94th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.55% (0.01547) | 72.92th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.55% (0.01547) | 51.82th | v2 (v2022.01.01) |
References (18)
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=54d5ca871e72f2bb172ec9323497f01cd5091ec7 x_refsource_CONFIRMIssue TrackingPatch
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9409e22acdfc9153f88d9b1ed2bd2a5b34d2d3ca x_refsource_CONFIRMIssue TrackingPatch
- http://rhn.redhat.com/errata/RHSA-2016-1847.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2016-1875.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2016-2574.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2016-2584.html vendor-advisoryx_refsource_REDHAT
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5 x_refsource_CONFIRMRelease Notes
- http://www.openwall.com/lists/oss-security/2016/07/11/8 mailing-listx_refsource_MLISTExploitMailing ListThird Party Advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html x_refsource_CONFIRMThird Party Advisory
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html x_refsource_CONFIRMVendor Advisory
- http://www.securityfocus.com/bid/91709 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id/1036273 vdb-entryx_refsource_SECTRACK
- https://access.redhat.com/security/cve/CVE-2016-6198 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1355654 x_refsource_CONFIRMIssue Tracking
- https://github.com/torvalds/linux/commit/54d5ca871e72f2bb172ec9323497f01cd5091ec7 x_refsource_CONFIRMIssue TrackingPatch
- https://github.com/torvalds/linux/commit/9409e22acdfc9153f88d9b1ed2bd2a5b34d2d3ca x_refsource_CONFIRMIssue TrackingPatch
- https://nvd.nist.gov/vuln/detail/CVE-2016-6198
- https://www.cve.org/CVERecord?id=CVE-2016-6198
Change history (0)
No recorded changes yet.