# CVE-2025-27021: Operating System Misconfiguration in Infinera G42

> Low-privileged users can escalate privileges and access kernel memory via misconfigured sudo permissions on the Infinera G42 operating system.

- **Severity:** High 7.0 (`CVSS:3.1/AV:L/AC:H/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:** 2 Jul 2025
- **Updated:** 2 Jul 2025
- **Also known as:** GHSA-9w8q-pjh8-6h83

## What is CVE-2025-27021?

CVE-2025-27021 is a high-severity vulnerability in Infinera G42, published on 2 Jul 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

The misconfiguration in the sudoers configuration of the operating system in
 Infinera G42 version R6.1.3 allows low privileged OS users to 
read/write physical memory via devmem command line tool. 
This could 
allow sensitive information disclosure, denial of service, and privilege 
escalation by tampering with kernel memory.

Details: The output of "sudo -l" reports the presence of "devmem" command 
executable as super user without using a password. This command allows 
to read and write an arbitrary memory area of the target device, 
specifying an absolute address.

Weakness: CWE-266 (Incorrect Privilege Assignment)

## Which versions are affected by CVE-2025-27021?

It affects 1 product.


Products: Nokia G42 Firmware.

## How do I fix CVE-2025-27021?

No fix has been published for CVE-2025-27021 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-27021 being exploited?

There is no known exploitation of CVE-2025-27021 in the wild and no public exploit code.

## Other vulnerabilities in Infinera G42

- [CVE-2025-27022](https://insights.sbomify.com/CVE-2025-27022/): Path Traversal Vulnerability in Infinera G42 (high 7.5)
- [CVE-2025-27023](https://insights.sbomify.com/CVE-2025-27023/): Improper Input Validation in Infinera G42 (medium 6.5)
- [CVE-2025-27024](https://insights.sbomify.com/CVE-2025-27024/): Improper File Access in Infinera G42 (medium 6.5)
- [CVE-2025-27026](https://insights.sbomify.com/CVE-2025-27026/): Improper Access Control Granularity impacting Infinera G42 (medium 4.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-27021 and fix it if it is affected.

What it is: CVE-2025-27021 is a high-severity vulnerability in Infinera G42, published on 2 Jul 2025. 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-2025-27021 in the wild and no public exploit code.

Affected product: Infinera G42. 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-2025-27021/ (Markdown: https://insights.sbomify.com/CVE-2025-27021/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-27021
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-27021
- OSV: https://osv.dev/vulnerability/CVE-2025-27021

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-27021/
Summaries are generated and may contain mistakes; the official description above is the record.