---
id: CVE-2022-2529
aliases:
  - GHSA-9rpw-2h95-666c
  - GO-2022-1032
title: >-
  Cloudflare GoFlow vulnerable to a Denial of Service in the sflow packet
  handling package
summary: >-
  Cloudflare GoFlow vulnerable to a Denial of Service in the sflow packet
  handling package
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
vendor: cloudflare
product: github.com/cloudflare/goflow/v3
ecosystem: go
affected:
  - github.com/cloudflare/goflow/v3 < 3.4.4
patched:
  - github.com/cloudflare/goflow/v3 3.4.4
published: '2022-10-01'
updated: '2026-07-08'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-9rpw-2h95-666c'
references:
  - url: >-
      https://github.com/cloudflare/goflow/security/advisories/GHSA-9rpw-2h95-666c
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2022-2529'
  - url: >-
      https://github.com/cloudflare/goflow/commit/2b94619a6204443e3ca1769f4e459f9f57039c51
  - url: >-
      https://github.com/cloudflare/goflow/commit/c829ccd2c0aafdc9b886b20bf6f28095607f4998
  - url: 'https://github.com/cloudflare/goflow'
  - url: 'https://github.com/cloudflare/goflow/releases/tag/v3.4.4'
tags:
  - osv
  - go
epss: 0.00873
epssPercentile: 0.57396
ingestedAt: '2026-07-09T18:56:36.293Z'
---

## Overview

### Impact
The sflow decode package prior to version 3.4.4 does not employ sufficient packet sanitisation which can lead to a denial of service attack. Attackers can craft malformed packets causing the process to consume huge amounts of memory resulting in a denial of service.

### Specific Go Packages Affected
github.com/cloudflare/goflow/v3/decoders/sflow

### Patches
Version 3.4.4 contains patches fixing this.

### Workarounds
A possible workaround is to not have your goflow collector publicly reachable.

### For more information
If you have any questions or comments about this advisory:
* Open an issue in [goflow repo](https://github.com/cloudflare/goflow)
* Email us [netdev[@]cloudflare.com ](mailto:netdev@cloudflare.com)


## Affected packages

- `github.com/cloudflare/goflow/v3 < 3.4.4`

## Remediation

Upgrade to a patched release:

- `github.com/cloudflare/goflow/v3 3.4.4`