# CVE-2022-37035: Use after free in n/a

> A race condition in FRRouting's BGP daemon allows remote attackers to execute code or disclose information via crafted packets.

- **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/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:** 2 Aug 2022
- **Updated:** 4 Nov 2025
- **Also known as:** DEBIAN-CVE-2022-37035, GHSA-rg6w-grg6-5wqf, UBUNTU-CVE-2022-37035

## What is CVE-2022-37035?

CVE-2022-37035 is a high-severity use after free vulnerability in n/a, published on 2 Aug 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in bgpd in FRRouting (FRR) 8.3. In bgp_notify_send_with_data() and bgp_process_packet() in bgp_packet.c, there is a possible use-after-free due to a race condition. This could lead to Remote Code Execution or Information Disclosure by sending crafted BGP packets. User interaction is not needed for exploitation.

Weakness: CWE-362 (Concurrent Execution using Shared Resource with Improper Synchronization)

## Which versions are affected by CVE-2022-37035?

It affects 1 product.


Products: Frrouting Frrouting.

## How do I fix CVE-2022-37035?

Apply the vendor's patch.

## Is CVE-2022-37035 being exploited?

There is no known exploitation of CVE-2022-37035 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2024-44070](https://insights.sbomify.com/CVE-2024-44070/): Denial of service in n/a (critical 9.8)
- [CVE-2023-38406](https://insights.sbomify.com/CVE-2023-38406/): bgpd/bgp_flowspec.c in FRRouting (FRR) before 8.4.3 mishandles an nlri length of zero, aka a "flowspec overflow." (critical 9.8)
- [CVE-2022-26127](https://insights.sbomify.com/CVE-2022-26127/): Memory corruption in FRRouting (high 7.8)
- [CVE-2022-26128](https://insights.sbomify.com/CVE-2022-26128/): Memory corruption in FRRouting (high 7.8)
- [CVE-2022-26129](https://insights.sbomify.com/CVE-2022-26129/): Memory corruption in FRRouting (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-37035 and fix it if it is affected.

What it is: CVE-2022-37035 is a high-severity use after free vulnerability in n/a, published on 2 Aug 2022. 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-2022-37035 in the wild and no public exploit code.

Affected product: n/a. 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-2022-37035/ (Markdown: https://insights.sbomify.com/CVE-2022-37035/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-37035
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-37035
- OSV: https://osv.dev/vulnerability/CVE-2022-37035

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-37035/
Summaries are generated and may contain mistakes; the official description above is the record.