# CVE-2021-42252: Memory corruption in n/a

> Local attackers with access to the Aspeed LPC control interface can overwrite kernel memory, potentially leading to privilege escalation and code execution.

- **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:** Yes
- **Published:** 11 Oct 2021
- **Updated:** 4 Aug 2024
- **Also known as:** AZL-6599, DEBIAN-CVE-2021-42252, GHSA-2hvg-x2p3-jfmj, UBUNTU-CVE-2021-42252

## What is CVE-2021-42252?

CVE-2021-42252 is a high-severity memory corruption vulnerability in Linux kernel, published on 11 Oct 2021. 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 aspeed_lpc_ctrl_mmap in drivers/soc/aspeed/aspeed-lpc-ctrl.c in the Linux kernel before 5.14.6. Local attackers able to access the Aspeed LPC control interface could overwrite memory in the kernel and potentially execute privileges, aka CID-b49a0e69a7b1. This occurs because a certain comparison uses values that are not memory sizes.

## Which versions are affected by CVE-2021-42252?

It affects 11 products.


Products: Linux kernel, Netapp Cloud Backup, Netapp H300e Firmware, Netapp H300s Firmware, Netapp H410c Firmware, Netapp H410s Firmware, Netapp H500e Firmware, Netapp H500s Firmware, Netapp H700e Firmware, Netapp H700s Firmware, Netapp Solidfire Baseboard Management Controller Firmware.

## How do I fix CVE-2021-42252?

Upgrade to a fixed version.

## Is CVE-2021-42252 being exploited?

There is no known exploitation of CVE-2021-42252 in the wild and no public exploit code.

## Other vulnerabilities in Linux kernel

- [CVE-2026-53266](https://insights.sbomify.com/CVE-2026-53266/): Linux Kernel Out-of-Bounds Write (high 8.8, exploited in the wild)
- [CVE-2013-6282](https://insights.sbomify.com/CVE-2013-6282/): Linux Kernel Improper Input Validation (high 8.8, exploited in the wild)
- [CVE-2022-0185](https://insights.sbomify.com/CVE-2022-0185/): Linux Kernel Heap-Based Buffer Overflow (high 8.4, exploited in the wild)
- [CVE-2013-2094](https://insights.sbomify.com/CVE-2013-2094/): Linux Kernel Privilege Escalation (high 8.4, exploited in the wild)
- [CVE-2026-53362](https://insights.sbomify.com/CVE-2026-53362/): Linux Kernel Unspecified (high 7.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-42252 and fix it if it is affected.

What it is: CVE-2021-42252 is a high-severity memory corruption vulnerability in Linux kernel, published on 11 Oct 2021. 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-2021-42252 in the wild and no public exploit code.

Affected product: Linux kernel. 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-2021-42252/ (Markdown: https://insights.sbomify.com/CVE-2021-42252/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-42252
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-42252
- OSV: https://osv.dev/vulnerability/CVE-2021-42252

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-42252/
Summaries are generated and may contain mistakes; the official description above is the record.