# CVE-2022-30591: Denial of service in n/a

> Remote attackers can cause CPU exhaustion and denial of service in quic-go by sending incomplete QUIC or HTTP/3 requests due to a timer overflow bug.

- **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:** No
- **Published:** 6 Jul 2022
- **Updated:** 3 Aug 2024
- **Also known as:** DEBIAN-CVE-2022-30591, GHSA-w2rh-hf85-pfh4

## What is CVE-2022-30591?

CVE-2022-30591 is a high-severity denial of service vulnerability in n/a, published on 6 Jul 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

quic-go through 0.27.0 allows remote attackers to cause a denial of service (CPU consumption) via a Slowloris variant in which incomplete QUIC or HTTP/3 requests are sent. This occurs because mtu_discoverer.go misparses the MTU Discovery service and consequently overflows the probe timer. NOTE: the vendor's position is that this behavior should not be listed as a vulnerability on the CVE List

Weakness: CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2022-30591?

It affects 1 product.


Products: Quic-Go Project Quic-Go.

## How do I fix CVE-2022-30591?

No fix has been published for CVE-2022-30591 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-30591 being exploited?

There is no known exploitation of CVE-2022-30591 in the wild and no public exploit code.

Public exploit code:

- Attacks against QUIC (CVE-2022-30591) (github_poc): https://github.com/efchatz/QUIC-attacks

## Other vulnerabilities in n/a

- [CVE-2023-46239](https://insights.sbomify.com/CVE-2023-46239/): quic-go vulnerable to pointer dereference that can lead to panic (high 7.5)
- [CVE-2023-49295](https://insights.sbomify.com/CVE-2023-49295/): quic-go's path validation mechanism can cause denial of service (medium 6.4)
- [CVE-2026-40898](https://insights.sbomify.com/CVE-2026-40898/): quic-go: HTTP/3 QPACK Trailer Expansion Memory Exhaustion (medium 5.3)
- [CVE-2025-64702](https://insights.sbomify.com/CVE-2025-64702/): quic-go HTTP/3 QPACK Header Expansion DoS (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-30591 and fix it if it is affected.

What it is: CVE-2022-30591 is a high-severity denial of service vulnerability in n/a, published on 6 Jul 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-2022-30591 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-2022-30591/ (Markdown: https://insights.sbomify.com/CVE-2022-30591/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-30591
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-30591
- OSV: https://osv.dev/vulnerability/CVE-2022-30591

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-30591/
Summaries are generated and may contain mistakes; the official description above is the record.