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 | Product | Affected | Fixed |
|---|---|---|---|
| [UNKNOWN] | kernel: | 4.15-rc8 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | kernel-rt +10 | 3.10.0-957.1.3.rt56.913.el7 | RHSA-2018:3666 |
| RHEL 7 | perf +19 | 3.10.0-957.1.3.el7 | RHSA-2018:3651 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7.5 EUS | perf +18 | 3.10.0-862.25.3.el7 | RHSA-2018:3843 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | perf +12 | 3.10.0-957.1.3.el7 | ELSA-2018-3651 |
Advisories 4
- RHSA-2018:3843 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2018:3666 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2018:3651 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- ELSA-2018-3651 Moderate: kernel security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 27, 2018
References
- RHSA-2018:3843 vendor-advisory
- RHSA-2018:3666 vendor-advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f428fe4a04cc339166c8bbd489789760de3a0cee
- RHSA-2018:3651 vendor-advisory
- https://marc.info/?l=linux-netdev&m=151500466401174&w=2
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14646