# CVE-2022-32266: Race condition in n/a

> Attackers with DMA access can exploit a race condition in the SMI handler to corrupt memory and potentially execute code or escalate privileges.

- **Severity:** Medium 6.4 (`CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Nov 2022
- **Updated:** 30 Apr 2025
- **Also known as:** GHSA-j8q4-3cww-3fwm

## What is CVE-2022-32266?

CVE-2022-32266 is a medium-severity vulnerability in n/a, published on 14 Nov 2022. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

DMA attacks on the parameter buffer used by a software SMI handler used by the driver PcdSmmDxe could lead to a TOCTOU attack on the SMI handler and lead to corruption of other ACPI fields and adjacent memory fields. DMA attacks on the parameter buffer used by a software SMI handler used by the driver PcdSmmDxe could lead to a TOCTOU attack on the SMI handler and lead to corruption of other ACPI fields and adjacent memory fields. The attack would require detailed knowledge of the PCD database contents on the current platform. This issue was discovered by Insyde engineering during a security review. This issue is fixed in Kernel 5.3: 05.36.23, Kernel 5.4: 05.44.23, Kernel 5.5: 05.52.23. Kernel 5.2 is unaffected. CWE-787 An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. DMA attacks on the parameter buffer that is used by a software SMI handler (used by the PcdSmmDxe driver) could lead to a TOCTOU race-condition attack on the SMI handler, and lead to corruption of other ACPI fields and adjacent memory fields. The attack would require detailed knowledge of the PCD database contents on the current platform.

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

## Which versions are affected by CVE-2022-32266?

It affects 1 product.


Products: Insyde Kernel.

## How do I fix CVE-2022-32266?

No fix has been published for CVE-2022-32266 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-32266 being exploited?

There is no known exploitation of CVE-2022-32266 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2022-36337](https://insights.sbomify.com/CVE-2022-36337/): Memory corruption in n/a (high 8.2)
- [CVE-2022-29275](https://insights.sbomify.com/CVE-2022-29275/): Privilege escalation in n/a (high 8.2)
- [CVE-2022-29276](https://insights.sbomify.com/CVE-2022-29276/): Memory corruption in n/a (high 8.2)
- [CVE-2022-29278](https://insights.sbomify.com/CVE-2022-29278/): Memory corruption in n/a (high 8.2)
- [CVE-2022-29279](https://insights.sbomify.com/CVE-2022-29279/): Memory corruption in n/a (high 8.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-32266 and fix it if it is affected.

What it is: CVE-2022-32266 is a medium-severity vulnerability in n/a, published on 14 Nov 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-2022-32266 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-2022-32266/ (Markdown: https://insights.sbomify.com/CVE-2022-32266/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-32266
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-32266
- OSV: https://osv.dev/vulnerability/CVE-2022-32266

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-32266/
Summaries are generated and may contain mistakes; the official description above is the record.