# CVE-2022-2993: bt: host: Wrong key validation check

> A logic error in Zephyr RTOS Bluetooth SMP key validation allows attackers to bypass authentication requirements.

- **Severity:** High 8.6 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/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:** 12 Dec 2022
- **Updated:** 22 Apr 2025
- **Also known as:** GHSA-3286-jgjx-8cvr

## What is CVE-2022-2993?

CVE-2022-2993 is a high-severity authentication bypass vulnerability in Zephyrproject Zephyr, published on 12 Dec 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

There is an error in the condition of the last if-statement in the function smp_check_keys. It was rejecting current keys if all requirements were unmet.

Weakness: CWE-670 (Always-Incorrect Control Flow Implementation)

## Which versions are affected by CVE-2022-2993?

It affects 1 product.


Products: Zephyrproject Zephyr.

## How do I fix CVE-2022-2993?

No fix has been published for CVE-2022-2993 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-2993 being exploited?

There is no known exploitation of CVE-2022-2993 in the wild and no public exploit code.

## Other vulnerabilities in Zephyrproject Zephyr

- [CVE-2026-5067](https://insights.sbomify.com/CVE-2026-5067/): Out-of-bounds read/write in HTTP WebSocket upgrade via non-null-terminated Sec-WebSocket-Key (critical 9.8)
- [CVE-2022-3806](https://insights.sbomify.com/CVE-2022-3806/): Bluetooth HCI Error Handling Double Free (critical 9.8)
- [CVE-2017-14199](https://insights.sbomify.com/CVE-2017-14199/): Memory corruption in getaddrinfo (critical 9.8)
- [CVE-2018-1000800](https://insights.sbomify.com/CVE-2018-1000800/): Null dereference in n/a (critical 9.8)
- [CVE-2021-3329](https://insights.sbomify.com/CVE-2021-3329/): DOS: Incorrect handling of the initial HCI ACL_MTU handshake packet leads to crash of bluetooth host layer (critical 9.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-2993 and fix it if it is affected.

What it is: CVE-2022-2993 is a high-severity authentication bypass vulnerability in Zephyrproject Zephyr, published on 12 Dec 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-2022-2993 in the wild and no public exploit code.

Affected product: Zephyrproject Zephyr. 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-2022-2993/ (Markdown: https://insights.sbomify.com/CVE-2022-2993/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-2993
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-2993
- OSV: https://osv.dev/vulnerability/CVE-2022-2993

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-2993/
Summaries are generated and may contain mistakes; the official description above is the record.