# CVE-2023-47252: Memory corruption in n/a

> Attackers can tamper with SMM communication buffers via out-of-bounds access in InsydeH2O firmware, potentially modifying data or escalating privileges.

- **Severity:** Medium 6.3 (`CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/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:** 26 Apr 2024
- **Updated:** 20 Nov 2024
- **Also known as:** GHSA-46ff-m72j-q8vp

## What is CVE-2023-47252?

CVE-2023-47252 is a medium-severity memory corruption vulnerability in n/a, published on 26 Apr 2024. 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 PnpSmm in Insyde InsydeH2O with kernel 5.0 through 5.6. There is a possible out-of-bounds access in the SMM communication buffer, leading to tampering. The PNP-related SMI sub-functions do not verify data size before getting it from the communication buffer, which could lead to possible circumstances where the data immediately following the command buffer could be destroyed with a fixed value. This is fixed in kernel 5.2 v05.28.45, kernel 5.3 v05.37.45, kernel 5.4 v05.45.45, kernel 5.5 v05.53.45, and kernel 5.6 v05.60.45.

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

## Which versions are affected by CVE-2023-47252?

It affects 1 product.


Products: Insyde Kernel.

## How do I fix CVE-2023-47252?

No fix has been published for CVE-2023-47252 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-47252 being exploited?

There is no known exploitation of CVE-2023-47252 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-2023-47252 and fix it if it is affected.

What it is: CVE-2023-47252 is a medium-severity memory corruption vulnerability in n/a, published on 26 Apr 2024. 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-2023-47252 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-2023-47252/ (Markdown: https://insights.sbomify.com/CVE-2023-47252/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-47252
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-47252
- OSV: https://osv.dev/vulnerability/CVE-2023-47252

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-47252/
Summaries are generated and may contain mistakes; the official description above is the record.