# CVE-2023-1390: Denial of service in Linux kernel (TIPC kernel module)

> Remote attackers can cause a denial of service by sending specific UDP packets to systems using the TIPC kernel module, leading to 100% CPU utilization.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 16 Mar 2023
- **Updated:** 18 Sep 2026
- **Also known as:** DEBIAN-CVE-2023-1390, GHSA-875q-9h9j-qhmh, UBUNTU-CVE-2023-1390

## What is CVE-2023-1390?

CVE-2023-1390 is a high-severity denial of service vulnerability in Linux kernel, published on 16 Mar 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-1050 (Excessive Platform Resource Consumption within a Loop)

## Which versions are affected by CVE-2023-1390?

It affects 1 product.


Products: Linux kernel.

## How do I fix CVE-2023-1390?

Apply the vendor's patch.

## Is CVE-2023-1390 being exploited?

There is no known exploitation of CVE-2023-1390 in the wild and no public exploit code.

## Other vulnerabilities in Linux kernel

- [CVE-2026-53266](https://insights.sbomify.com/CVE-2026-53266/): Linux Kernel Out-of-Bounds Write (high 8.8, exploited in the wild)
- [CVE-2013-6282](https://insights.sbomify.com/CVE-2013-6282/): Linux Kernel Improper Input Validation (high 8.8, exploited in the wild)
- [CVE-2022-0185](https://insights.sbomify.com/CVE-2022-0185/): Linux Kernel Heap-Based Buffer Overflow (high 8.4, exploited in the wild)
- [CVE-2013-2094](https://insights.sbomify.com/CVE-2013-2094/): Linux Kernel Privilege Escalation (high 8.4, exploited in the wild)
- [CVE-2026-53362](https://insights.sbomify.com/CVE-2026-53362/): Linux Kernel Unspecified (high 7.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-1390 and fix it if it is affected.

What it is: CVE-2023-1390 is a high-severity denial of service vulnerability in Linux kernel, published on 16 Mar 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-1390 in the wild and no public exploit code.

Affected product: Linux kernel. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2023-1390/ (Markdown: https://insights.sbomify.com/CVE-2023-1390/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-1390
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-1390
- OSV: https://osv.dev/vulnerability/CVE-2023-1390

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-1390/
Summaries are generated and may contain mistakes; the official description above is the record.