# CVE-2022-37966: Windows Kerberos RC4-HMAC Elevation of Privilege Vulnerability

> An attacker can exploit a flaw in Windows Kerberos RC4-HMAC to elevate privileges on affected Windows Server systems.

- **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 9 Nov 2022
- **Updated:** 10 Aug 2026
- **Also known as:** ALPINE-CVE-2022-37966, AZL-54678, CLSA-2026-1788174820, DEBIAN-CVE-2022-37966, ECHO-d19a-6b22-1673, GHSA-jrg7-vpcv-rf8r, OESA-2023-1019, UBUNTU-CVE-2022-37966

## What is CVE-2022-37966?

CVE-2022-37966 is a high-severity vulnerability in Fedoraproject Fedora, published on 9 Nov 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Windows Kerberos RC4-HMAC Elevation of Privilege Vulnerability

## Which versions are affected by CVE-2022-37966?

It affects 9 products.


Products: Fedoraproject Fedora, Microsoft Windows Server 2008, Microsoft Windows Server 2012, Microsoft Windows Server 2016, Microsoft Windows Server 2019, Microsoft Windows Server 2022, Netapp Management Services for Element Software, Netapp Management Services for Netapp Hci, Samba Samba.

## How do I fix CVE-2022-37966?

Apply the vendor's patch.

## Is CVE-2022-37966 being exploited?

There is no known exploitation of CVE-2022-37966 in the wild and no public exploit code.

## Other vulnerabilities in Fedoraproject Fedora

- [CVE-2024-4577](https://insights.sbomify.com/CVE-2024-4577/): PHP-CGI OS Command Injection (critical 9.8, exploited in the wild)
- [CVE-2021-39226](https://insights.sbomify.com/CVE-2021-39226/): Grafana Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2019-5544](https://insights.sbomify.com/CVE-2019-5544/): VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2024-4947](https://insights.sbomify.com/CVE-2024-4947/): Google Chromium V8 Type Confusion (critical 9.6, exploited in the wild)
- [CVE-2024-4671](https://insights.sbomify.com/CVE-2024-4671/): Google Chromium Visuals Use-After-Free (critical 9.6, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-37966 and fix it if it is affected.

What it is: CVE-2022-37966 is a high-severity vulnerability in Fedoraproject Fedora, published on 9 Nov 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-2022-37966 in the wild and no public exploit code.

Affected product: Fedoraproject Fedora. 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-2022-37966/ (Markdown: https://insights.sbomify.com/CVE-2022-37966/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-37966
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-37966
- OSV: https://osv.dev/vulnerability/CVE-2022-37966

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-37966/
Summaries are generated and may contain mistakes; the official description above is the record.