# CVE-2022-43681: Denial of service in n/a

> A malformed BGP OPEN message causes an out-of-bounds read in FRRouting, crashing the daemon and causing a denial of service.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 3 May 2023
- **Updated:** 3 Aug 2024
- **Also known as:** DEBIAN-CVE-2022-43681, GHSA-x7mf-v6gh-vm4g

## What is CVE-2022-43681?

CVE-2022-43681 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 3 May 2023. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

An out-of-bounds read exists in the BGP daemon of FRRouting FRR through 8.4. When sending a malformed BGP OPEN message that ends with the option length octet (or the option length word, in case of an extended OPEN message), the FRR code reads of out of the bounds of the packet, throwing a SIGABRT signal and exiting. This results in a bgpd daemon restart, causing a Denial-of-Service condition.

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

## Which versions are affected by CVE-2022-43681?

It affects 2 products.


Products: Debian Debian Linux, Frrouting Frrouting.

## How do I fix CVE-2022-43681?

Upgrade to a fixed version.

## Is CVE-2022-43681 being exploited?

There is no known exploitation of CVE-2022-43681 in the wild and no public exploit code.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild)
- [CVE-2025-49113](https://insights.sbomify.com/CVE-2025-49113/): RoundCube Webmail Deserialization of Untrusted Data (critical 9.9, exploited in the wild)
- [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild)
- [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild)
- [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-43681 and fix it if it is affected.

What it is: CVE-2022-43681 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 3 May 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-43681 in the wild and no public exploit code.

Affected product: Debian Debian Linux. 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-2022-43681/ (Markdown: https://insights.sbomify.com/CVE-2022-43681/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-43681
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-43681
- OSV: https://osv.dev/vulnerability/CVE-2022-43681

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-43681/
Summaries are generated and may contain mistakes; the official description above is the record.