kernel: denial of service via ioctl call in network tun handling
Published May 17, 2019
6.2
MEDIUMCVSS 3.0
EPSS 0.65%
Description
In the tun subsystem in the Linux kernel before 4.13.14, dev_get_valid_name is not called before register_netdevice. This allows local users to cause a denial of service (NULL pointer dereference and panic) via an ioctl(TUNSETIFF) call with a dev name containing a / character. This is similar to CVE-2013-4343.
Affected products
No data.
- < 4.13.14
No data.
Red Hat Enterprise Linux 7
kernel-0:3.10.0-1127.el7
Fixed · RHSA-2020:1016
Red Hat Enterprise Linux 7
kernel-rt-0:3.10.0-1127.rt56.1093.el7
Fixed · RHSA-2020:1070
Red Hat Enterprise Linux 7.6 Extended Update Support
kernel-0:3.10.0-957.56.1.el7
Fixed · RHSA-2020:2851
Red Hat Enterprise Linux 7.7 Extended Update Support
kernel-0:3.10.0-1062.26.1.el7
Fixed · RHSA-2020:2522
Red Hat Virtualization 4.2 for Red Hat Enterprise Linux 7.6 EUS
kernel-0:3.10.0-957.56.1.el7
Fixed · RHSA-2020:2851
Red Hat Enterprise Linux 5
kernel
Out of support scope
Red Hat Enterprise Linux 6
kernel
Will not fix
Red Hat Enterprise Linux 7
kernel-alt
Not affected
Red Hat Enterprise Linux 8
kernel
Not affected
Red Hat Enterprise Linux 8
kernel-rt
Not affected
Red Hat Enterprise MRG 2
kernel-rt
Out of support scope
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-1127.el7 | Fixed | RHSA-2020:1016 |
| Red Hat Enterprise Linux 7 | kernel-rt-0:3.10.0-1127.rt56.1093.el7 | Fixed | RHSA-2020:1070 |
| Red Hat Enterprise Linux 7.6 Extended Update Support | kernel-0:3.10.0-957.56.1.el7 | Fixed | RHSA-2020:2851 |
| Red Hat Enterprise Linux 7.7 Extended Update Support | kernel-0:3.10.0-1062.26.1.el7 | Fixed | RHSA-2020:2522 |
| Red Hat Virtualization 4.2 for Red Hat Enterprise Linux 7.6 EUS | kernel-0:3.10.0-957.56.1.el7 | Fixed | RHSA-2020:2851 |
| Red Hat Enterprise Linux 5 | kernel | Out of support scope | n/a |
| Red Hat Enterprise Linux 6 | kernel | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | kernel-alt | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise MRG 2 | kernel-rt | Out of support scope | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
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
1 other source (Red Hat) ▾
CVSS:3.0/AV:L/AC:L/PR:N/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
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.65% (0.00654) | 49.47th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.65% (0.00654) | 46.28th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.09% (0.00088) | 22.96th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00042) | 5.07th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.28% (0.01282) | 68.34th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.28% (0.01282) | 41.72th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.65% (0.01652) | 33.92th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.65% (0.01652) | 0.00th | v1 |
References (15)
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00071.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00039.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00048.html vendor-advisoryx_refsource_SUSE
- http://www.securityfocus.com/bid/108380 vdb-entryx_refsource_BID
- https://access.redhat.com/security/cve/CVE-2018-7191 Vendor Advisory
- https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1743792 x_refsource_MISCExploitThird Party Advisory
- https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1748846 x_refsource_MISCPatchThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1716328 Issue Tracking
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.14 x_refsource_MISCRelease NotesVendor Advisory
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0ad646c81b2182f7fa67ec0c8c825e0ee165696d x_refsource_MISCPatchThird Party AdvisoryVendor Advisory
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5c25f65fd1e42685f7ccd80e0621829c105785d9 x_refsource_MISCPatchVendor Advisory
- https://github.com/torvalds/linux/commit/0ad646c81b2182f7fa67ec0c8c825e0ee165696d x_refsource_MISCPatchThird Party Advisory
- https://github.com/torvalds/linux/commit/5c25f65fd1e42685f7ccd80e0621829c105785d9 x_refsource_MISCPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-7191
- https://www.cve.org/CVERecord?id=CVE-2018-7191
Change history (0)
No recorded changes yet.