# CVE-2022-28806: Memory corruption in n/a

> Attackers can corrupt SMRAM via insufficient validation in the FjGabiFlashCoreAbstractionSmm driver, enabling arbitrary code execution in System Management Mode.

- **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:** 4 May 2022
- **Updated:** 4 Nov 2025
- **Also known as:** GHSA-mj72-h98r-6h24

## What is CVE-2022-28806?

CVE-2022-28806 is a high-severity memory corruption vulnerability in n/a, published on 4 May 2022. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An issue was discovered on certain Fujitsu LIEFBOOK devices (A3510, U9310, U7511/U7411/U7311, U9311, E5510/E5410, U7510/U7410/U7310, E459/E449) with BIOS versions before v1.09 (A3510), v2.17 (U9310), v2.30 (U7511/U7411/U7311), v2.33 (U9311), v2.23 (E5510), v2.19 (U7510/U7410), v2.13 (U7310), and v1.09 (E459/E449). The FjGabiFlashCoreAbstractionSmm driver registers a Software System Management Interrupt (SWSMI) handler that is not sufficiently validated to ensure that the CommBuffer (or any other communication buffer's nested contents) are not pointing to SMRAM contents. A potential attacker can therefore write fixed data to SMRAM, which could lead to data corruption inside this memory (e.g., change the SMI handler's code or modify SMRAM map structures to break input pointer validation for other SMI handlers). Thus, the attacker could elevate privileges from ring 0 to ring -2 and execute arbitrary code in SMM.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2022-28806?

It affects 12 products.


Products: Fujitsu Lifebook A3510 Firmware, Fujitsu Lifebook E449 Firmware, Fujitsu Lifebook E459 Firmware, Fujitsu Lifebook E5510 Firmware, Fujitsu Lifebook U7310 Firmware, Fujitsu Lifebook U7311 Firmware, Fujitsu Lifebook U7410 Firmware, Fujitsu Lifebook U7411 Firmware, Fujitsu Lifebook U7510 Firmware, Fujitsu Lifebook U7511 Firmware, Fujitsu Lifebook U9310 Firmware, Fujitsu Lifebook U9311 Firmware.

## How do I fix CVE-2022-28806?

No fix has been published for CVE-2022-28806 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-28806 being exploited?

There is no known exploitation of CVE-2022-28806 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-28806 and fix it if it is affected.

What it is: CVE-2022-28806 is a high-severity memory corruption vulnerability in n/a, published on 4 May 2022. 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-2022-28806 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-2022-28806/ (Markdown: https://insights.sbomify.com/CVE-2022-28806/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-28806
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-28806
- OSV: https://osv.dev/vulnerability/CVE-2022-28806

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From sbomify Insights: https://insights.sbomify.com/CVE-2022-28806/
Summaries are generated and may contain mistakes; the official description above is the record.