# CVE-2022-36053: Out-of-bounds read in the uIP buffer module

> An attacker can read memory outside the packet buffer via crafted IPv6 packets, potentially exposing sensitive data in Contiki-NG IoT devices.

- **Severity:** Medium 5.9 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Sep 2022
- **Updated:** 23 Apr 2025
- **Also known as:** GHSA-2j9c-7754-w4cw

## What is CVE-2022-36053?

CVE-2022-36053 is a medium-severity vulnerability in contiki-ng, published on 1 Sep 2022. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Contiki-NG is an open-source, cross-platform operating system for Next-Generation IoT devices. The low-power IPv6 network stack of Contiki-NG has a buffer module (os/net/ipv6/uipbuf.c) that processes IPv6 extension headers in incoming data packets. As part of this processing, the function uipbuf_get_next_header casts a pointer to a uip_ext_hdr structure into the packet buffer at different offsets where extension headers are expected to be found, and then reads from this structure. Because of a lack of bounds checking, the casting can be done so that the structure extends beyond the packet's end. Hence, with a carefully crafted packet, it is possible to cause the Contiki-NG system to read data outside the packet buffer. A patch that fixes the vulnerability is included in Contiki-NG 4.8.

Weakness: CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2022-36053?

It affects 1 product.


Products: Contiki-Ng Contiki-Ng.

## How do I fix CVE-2022-36053?

No fix has been published for CVE-2022-36053 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-36053 being exploited?

There is no known exploitation of CVE-2022-36053 in the wild and no public exploit code.

## Other vulnerabilities in contiki-ng

- [CVE-2018-19417](https://insights.sbomify.com/CVE-2018-19417/): Memory corruption in n/a (critical 10.0)
- [CVE-2023-30546](https://insights.sbomify.com/CVE-2023-30546/): Contiki-NG has off-by-one error in Antelope DBMS (critical 9.8)
- [CVE-2020-24336](https://insights.sbomify.com/CVE-2020-24336/): Memory corruption in n/a (critical 9.8)
- [CVE-2020-14934](https://insights.sbomify.com/CVE-2020-14934/): Memory corruption in n/a (critical 9.8)
- [CVE-2020-14935](https://insights.sbomify.com/CVE-2020-14935/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-36053 and fix it if it is affected.

What it is: CVE-2022-36053 is a medium-severity vulnerability in contiki-ng, published on 1 Sep 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-36053 in the wild and no public exploit code.

Affected product: contiki-ng. 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-2022-36053/ (Markdown: https://insights.sbomify.com/CVE-2022-36053/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-36053
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-36053
- OSV: https://osv.dev/vulnerability/CVE-2022-36053

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-36053/
Summaries are generated and may contain mistakes; the official description above is the record.