kernel: NULL pointer dereference in af_netlink.c:__netlink_ns_capable() allows for denial of service
Published Nov 26, 2018
5.5
MEDIUMCVSS 3.0
EPSS 0.39%
Description
The Linux kernel before 4.15-rc8 was found to be vulnerable to a NULL pointer dereference bug in the __netlink_ns_capable() function in the net/netlink/af_netlink.c file. A local attacker could exploit this when a net namespace with a netnsid is assigned to cause a kernel panic and a denial of service.
Affected products
- Vendor n/a Product Kernel: Defaultn/a
- Version 4.15-rc8StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | Kernel: | n/a |
|
Configuration 1
- ≤ 4.14
- 4.15
- 4.15
- 4.15
- 4.15
- 4.15
- 4.15
- 4.15
Configuration 2
- 7.0
- 7.0
- 7.6
- 7.5
- 7.6
- 7.6
- 7.0
No data.
Red Hat Enterprise Linux 7
kernel-0:3.10.0-957.1.3.el7
Fixed · RHSA-2018:3651
Red Hat Enterprise Linux 7
kernel-rt-0:3.10.0-957.1.3.rt56.913.el7
Fixed · RHSA-2018:3666
Red Hat Enterprise Linux 7.5 Extended Update Support
kernel-0:3.10.0-862.25.3.el7
Fixed · RHSA-2018:3843
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
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
Affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-957.1.3.el7 | Fixed | RHSA-2018:3651 |
| Red Hat Enterprise Linux 7 | kernel-rt-0:3.10.0-957.1.3.rt56.913.el7 | Fixed | RHSA-2018:3666 |
| Red Hat Enterprise Linux 7.5 Extended Update Support | kernel-0:3.10.0-862.25.3.el7 | Fixed | RHSA-2018:3843 |
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | 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 | Affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
If you're not running container images, or creating net namepaces exposed to potentially malicious workloads this issue has a security impact of moderate. This issue has an important impact if the system is being used to run container images with untrusted content, such as an OpenShift Container Platform compute node.
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
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (8 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.39% (0.00393) | 31.04th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.39% (0.00393) | 33.30th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.04% (0.00042) | 5.06th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.03% (0.01034) | 41.69th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.03% (0.01034) | 20.32th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.97% (0.00967) | 26.07th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.97% (0.00967) | 0.00th | v1 |
References (10)
- https://access.redhat.com/errata/RHSA-2018:3651 vendor-advisoryx_refsource_REDHATVendor Advisory
- https://access.redhat.com/errata/RHSA-2018:3666 vendor-advisoryx_refsource_REDHATVendor Advisory
- https://access.redhat.com/errata/RHSA-2018:3843 vendor-advisoryx_refsource_REDHATVendor Advisory
- https://access.redhat.com/security/cve/CVE-2018-14646 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1630124 Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14646 x_refsource_CONFIRMIssue TrackingPatchVendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f428fe4a04cc339166c8bbd489789760de3a0cee x_refsource_CONFIRMPatchThird Party Advisory
- https://marc.info/?l=linux-netdev&m=151500466401174&w=2 x_refsource_CONFIRMPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-14646
- https://www.cve.org/CVERecord?id=CVE-2018-14646
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/errata/RHSA-2018:3651 | vendor-advisoryx_refsource_REDHATVendor Advisory | |
| https://access.redhat.com/errata/RHSA-2018:3666 | vendor-advisoryx_refsource_REDHATVendor Advisory | |
| https://access.redhat.com/errata/RHSA-2018:3843 | vendor-advisoryx_refsource_REDHATVendor Advisory | |
| https://access.redhat.com/security/cve/CVE-2018-14646 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1630124 | Issue Tracking | |
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14646 | x_refsource_CONFIRMIssue TrackingPatchVendor Advisory | |
| https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f428fe4a04cc339166c8bbd489789760de3a0cee | x_refsource_CONFIRMPatchThird Party Advisory | |
| https://marc.info/?l=linux-netdev&m=151500466401174&w=2 | x_refsource_CONFIRMPatchThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-14646 | ||
| https://www.cve.org/CVERecord?id=CVE-2018-14646 |
Change history (0)
No recorded changes yet.