# CVE-2023-39197: Kernel: dccp: conntrack out-of-bounds read in nf_conntrack_dccp_packet()

> A remote attacker can disclose sensitive kernel memory information via the DCCP protocol due to an out-of-bounds read in Netfilter conntrack.

- **Severity:** Medium 4.0 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 23 Jan 2024
- **Updated:** 6 Aug 2026
- **Also known as:** DEBIAN-CVE-2023-39197, GHSA-w83m-85f8-627v, OESA-2023-1858, OESA-2023-1862, UBUNTU-CVE-2023-39197

## What is CVE-2023-39197?

CVE-2023-39197 is a medium-severity vulnerability in Fedoraproject Fedora, published on 23 Jan 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An out-of-bounds read vulnerability was found in Netfilter Connection Tracking (conntrack) in the Linux kernel. This flaw allows a remote user to disclose sensitive information via the DCCP protocol.

Weakness: CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2023-39197?

It affects 2 products.


Products: Fedoraproject Fedora, Linux kernel.

## How do I fix CVE-2023-39197?

Apply the vendor's patch.

## Is CVE-2023-39197 being exploited?

There is no known exploitation of CVE-2023-39197 in the wild and no public exploit code.

## Other vulnerabilities in Fedoraproject Fedora

- [CVE-2024-4577](https://insights.sbomify.com/CVE-2024-4577/): PHP-CGI OS Command Injection (critical 9.8, exploited in the wild)
- [CVE-2021-39226](https://insights.sbomify.com/CVE-2021-39226/): Grafana Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2019-5544](https://insights.sbomify.com/CVE-2019-5544/): VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2024-4947](https://insights.sbomify.com/CVE-2024-4947/): Google Chromium V8 Type Confusion (critical 9.6, exploited in the wild)
- [CVE-2024-4671](https://insights.sbomify.com/CVE-2024-4671/): Google Chromium Visuals Use-After-Free (critical 9.6, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-39197 and fix it if it is affected.

What it is: CVE-2023-39197 is a medium-severity vulnerability in Fedoraproject Fedora, published on 23 Jan 2024. 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-2023-39197 in the wild and no public exploit code.

Affected product: Fedoraproject Fedora. 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-2023-39197/ (Markdown: https://insights.sbomify.com/CVE-2023-39197/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-39197
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-39197
- OSV: https://osv.dev/vulnerability/CVE-2023-39197

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-39197/
Summaries are generated and may contain mistakes; the official description above is the record.