# CVE-2025-2486: UEFI Shell accessible in AAVMF with Secure Boot enabled on Ubuntu

> Attackers can access the UEFI Shell in Secure Boot environments, potentially bypassing Secure Boot constraints on Ubuntu systems.

- **Severity:** Low 3.7 (`CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:H/SI:H/SA:H/E:U`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 26 Nov 2025
- **Updated:** 26 Nov 2025
- **Also known as:** DEBIAN-CVE-2025-2486, GHSA-g658-h443-xpr6, UBUNTU-CVE-2025-2486

## What is CVE-2025-2486?

CVE-2025-2486 is a low-severity vulnerability in Ubuntu edk2, published on 26 Nov 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

The Ubuntu edk2 UEFI firmware packages accidentally allowed the UEFI Shell to be accessed in Secure Boot environments, possibly allowing bypass of Secure Boot constraints. Versions 2024.05-2ubuntu0.3 and 2024.02-2ubuntu0.3 disable the Shell. Some previous versions inserted a secure-boot-based decision to continue running inside the Shell itself, which is believed to be sufficient to enforce Secure Boot restrictions. This is an additional repair on top of the incomplete fix for CVE-2023-48733.

Weakness: CWE-489 (Active Debug Code)

## Which versions are affected by CVE-2025-2486?

It affects 1 product.


Products: Tianocore Edk2.

## How do I fix CVE-2025-2486?

Apply the vendor's patch.

## Is CVE-2025-2486 being exploited?

There is no known exploitation of CVE-2025-2486 in the wild and no public exploit code.

## Other vulnerabilities in Ubuntu edk2

- [CVE-2023-45230](https://insights.sbomify.com/CVE-2023-45230/): Buffer Overflow in EDK II Network Package (high 8.3)
- [CVE-2023-45234](https://insights.sbomify.com/CVE-2023-45234/): Buffer Overflow in EDK II Network Package (high 8.3)
- [CVE-2023-45235](https://insights.sbomify.com/CVE-2023-45235/): Buffer Overflow in EDK II Network Package (high 8.3)
- [CVE-2021-28210](https://insights.sbomify.com/CVE-2021-28210/): Denial of service in EDK II (high 7.8)
- [CVE-2019-14584](https://insights.sbomify.com/CVE-2019-14584/): Null dereference in Tianocore EDK2 (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-2486 and fix it if it is affected.

What it is: CVE-2025-2486 is a low-severity vulnerability in Ubuntu edk2, published on 26 Nov 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2025-2486 in the wild and no public exploit code.

Affected product: Ubuntu edk2. 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-2025-2486/ (Markdown: https://insights.sbomify.com/CVE-2025-2486/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-2486
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-2486
- OSV: https://osv.dev/vulnerability/CVE-2025-2486

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-2486/
Summaries are generated and may contain mistakes; the official description above is the record.