# CVE-2021-44149: Security feature bypass in n/a

> Attackers can bypass TrustZone isolation to read or write Secure World memory via the NXP i.MX6UL CSU driver.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **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:** No
- **Published:** 7 Dec 2021
- **Updated:** 4 Aug 2024

## What is CVE-2021-44149?

CVE-2021-44149 is a high-severity vulnerability in n/a, published on 7 Dec 2021. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An issue was discovered in Trusted Firmware OP-TEE Trusted OS through 3.15.0. The OPTEE-OS CSU driver for NXP i.MX6UL SoC devices lacks security access configuration for wakeup-related registers, resulting in TrustZone bypass because the NonSecure World can perform arbitrary memory read/write operations on Secure World memory. This involves a v cycle.

## Which versions are affected by CVE-2021-44149?

It affects 1 product.


Products: Trustedfirmware Op-Tee.

## How do I fix CVE-2021-44149?

No fix has been published for CVE-2021-44149 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-44149 being exploited?

There is no known exploitation of CVE-2021-44149 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2019-1010292](https://insights.sbomify.com/CVE-2019-1010292/): Memory corruption in OP-TEE (critical 9.8)
- [CVE-2019-1010293](https://insights.sbomify.com/CVE-2019-1010293/): Memory corruption in OP-TEE (critical 9.8)
- [CVE-2019-1010295](https://insights.sbomify.com/CVE-2019-1010295/): Linaro/OP-TEE OP-TEE 3.3.0 and earlier is affected by: Buffer Overflow. (critical 9.8)
- [CVE-2019-1010296](https://insights.sbomify.com/CVE-2019-1010296/): Memory corruption in OP-TEE (critical 9.8)
- [CVE-2019-1010297](https://insights.sbomify.com/CVE-2019-1010297/): Memory corruption in OP-TEE (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-44149 and fix it if it is affected.

What it is: CVE-2021-44149 is a high-severity vulnerability in n/a, published on 7 Dec 2021. 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-2021-44149 in the wild and no public exploit code.

Affected product: n/a. 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-2021-44149/ (Markdown: https://insights.sbomify.com/CVE-2021-44149/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-44149
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-44149
- OSV: https://osv.dev/vulnerability/CVE-2021-44149

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-44149/
Summaries are generated and may contain mistakes; the official description above is the record.