# CVE-2022-3566: Linux Kernel TCP tcp_setsockopt race condition

> A race condition in the Linux Kernel TCP handler allows local attackers to potentially cause undefined behavior, requiring kernel upgrades to mitigate.

- **Severity:** Low 2.1 (`CVSS:4.0/AV:A/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 17 Oct 2022
- **Updated:** 30 Jul 2026
- **Also known as:** DEBIAN-CVE-2022-3566, GHSA-qfg2-8gf5-3xfc, ROOT-OS-DEBIAN-11-CVE-2022-3566, UBUNTU-CVE-2022-3566

## What is CVE-2022-3566?

CVE-2022-3566 is a low-severity vulnerability in Linux kernel, published on 17 Oct 2022. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability was identified in Linux Kernel up to 4.19.316/5.4.278/5.10.220/5.15.161. This impacts the function tcp_getsockopt/tcp_setsockopt of the component TCP Handler. Such manipulation leads to race condition. A high complexity level is associated with this attack. The exploitability is said to be difficult. The vulnerability was introduced in 2.6.12, commit 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ("Linux-2.6.12-rc2"). Upgrading to version 4.19.317, 5.4.279, 5.10.221, 5.15.162 and 6.1 will fix this issue. The name of the patch is fcd31dd8291b23d713245947ec2b2d99ef07aef2/3b32f265805a49071e2c4568a524398ba22bf93c/d529193eae979a7bf2255cd9fe68b7af7a1c91b3/5bb642cc3355ffd3c8bca0a8bd8e6e65bcc2091c/f49cd2f4d6170d27a2c61f1fecb03d8a70c91f57. The affected component should be upgraded.

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

## Which versions are affected by CVE-2022-3566?

It affects 1 product.


Products: Linux kernel.

## How do I fix CVE-2022-3566?

Upgrade to a fixed version.

## Is CVE-2022-3566 being exploited?

There is no known exploitation of CVE-2022-3566 in the wild and no public exploit code.

## Other vulnerabilities in Linux kernel

- [CVE-2026-53266](https://insights.sbomify.com/CVE-2026-53266/): Linux Kernel Out-of-Bounds Write (high 8.8, exploited in the wild)
- [CVE-2013-6282](https://insights.sbomify.com/CVE-2013-6282/): Linux Kernel Improper Input Validation (high 8.8, exploited in the wild)
- [CVE-2022-0185](https://insights.sbomify.com/CVE-2022-0185/): Linux Kernel Heap-Based Buffer Overflow (high 8.4, exploited in the wild)
- [CVE-2013-2094](https://insights.sbomify.com/CVE-2013-2094/): Linux Kernel Privilege Escalation (high 8.4, exploited in the wild)
- [CVE-2026-53362](https://insights.sbomify.com/CVE-2026-53362/): Linux Kernel Unspecified (high 7.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-3566 and fix it if it is affected.

What it is: CVE-2022-3566 is a low-severity vulnerability in Linux kernel, published on 17 Oct 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-3566 in the wild and no public exploit code.

Affected product: Linux kernel. 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-2022-3566/ (Markdown: https://insights.sbomify.com/CVE-2022-3566/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-3566
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-3566
- OSV: https://osv.dev/vulnerability/CVE-2022-3566

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-3566/
Summaries are generated and may contain mistakes; the official description above is the record.