# CVE-2022-2741: can: denial-of-service can be triggered by a crafted CAN frame

> An attacker on the CAN network can cause a denial of service in Zephyr RTOS by sending a crafted CAN frame with mismatched RTR bits.

- **Severity:** High 8.2 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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:** 31 Oct 2022
- **Updated:** 5 May 2025
- **Also known as:** GHSA-hx5v-j59q-c3j8

## What is CVE-2022-2741?

CVE-2022-2741 is a high-severity denial of service vulnerability in Zephyrproject Zephyr, published on 31 Oct 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The denial-of-service can be triggered by transmitting a carefully crafted CAN frame on the same CAN network as the vulnerable node. The frame must have a CAN ID matching an installed filter in the vulnerable node (this can easily be guessed based on CAN traffic analyses). The frame must contain the opposite RTR bit as what the filter installed in the vulnerable node contains (if the filter matches RTR frames, the frame must be a data frame or vice versa).

Weakness: CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2022-2741?

It affects 1 product.


Products: Zephyrproject Zephyr.

## How do I fix CVE-2022-2741?

No fix has been published for CVE-2022-2741 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-2741 being exploited?

There is no known exploitation of CVE-2022-2741 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-2022-2741 and fix it if it is affected.

What it is: CVE-2022-2741 is a high-severity denial of service vulnerability in Zephyrproject Zephyr, published on 31 Oct 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-2022-2741 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-2022-2741/ (Markdown: https://insights.sbomify.com/CVE-2022-2741/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-2741
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-2741
- OSV: https://osv.dev/vulnerability/CVE-2022-2741

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-2741/
Summaries are generated and may contain mistakes; the official description above is the record.