# CVE-2021-33060: Memory corruption in Intel(R) Processors

> An authenticated local attacker can exploit an out-of-bounds write in Intel BIOS firmware to escalate privileges.

- **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:** 18 Aug 2022
- **Updated:** 5 May 2025
- **Also known as:** GHSA-wq7v-mxjw-fp8v

## What is CVE-2021-33060?

CVE-2021-33060 is a high-severity memory corruption vulnerability in Intel(R) Processors, published on 18 Aug 2022. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Out-of-bounds write in the BIOS firmware for some Intel(R) Processors may allow an authenticated user to potentially enable escalation of privilege via local access.

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

## Which versions are affected by CVE-2021-33060?

It affects 72 products.


Products: Intel Xeon Gold 5315y Firmware, Intel Xeon Gold 5317 Firmware, Intel Xeon Gold 5318h Firmware, Intel Xeon Gold 5318n Firmware, Intel Xeon Gold 5318s Firmware, Intel Xeon Gold 5318y Firmware, Intel Xeon Gold 5320 Firmware, Intel Xeon Gold 5320h Firmware, Intel Xeon Gold 5320t Firmware, Intel Xeon Gold 6312u Firmware, Intel Xeon Gold 6314u Firmware, Intel Xeon Gold 6326 Firmware, Intel Xeon Gold 6328h Firmware, Intel Xeon Gold 6328hl Firmware, Intel Xeon Gold 6330 Firmware, Intel Xeon Gold 6330h Firmware, Intel Xeon Gold 6330n Firmware, Intel Xeon Gold 6334 Firmware, Intel Xeon Gold 6336y Firmware, Intel Xeon Gold 6338 Firmware and 52 more.

## How do I fix CVE-2021-33060?

No fix has been published for CVE-2021-33060 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-33060 being exploited?

There is no known exploitation of CVE-2021-33060 in the wild and no public exploit code.

## Other vulnerabilities in Intel(R) Processors

- [CVE-2022-30539](https://insights.sbomify.com/CVE-2022-30539/): Use after free in Intel(R) Processors (high 7.5)
- [CVE-2022-33972](https://insights.sbomify.com/CVE-2022-33972/): Information disclosure in 3rd Generation Intel(R) Xeon(R) Scalable Processors (medium 6.1)
- [CVE-2021-0187](https://insights.sbomify.com/CVE-2021-0187/): Privilege escalation in Intel(R) Processors (low 3.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-33060 and fix it if it is affected.

What it is: CVE-2021-33060 is a high-severity memory corruption vulnerability in Intel(R) Processors, published on 18 Aug 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-2021-33060 in the wild and no public exploit code.

Affected product: Intel(R) Processors. 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-2021-33060/ (Markdown: https://insights.sbomify.com/CVE-2021-33060/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-33060
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-33060
- OSV: https://osv.dev/vulnerability/CVE-2021-33060

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-33060/
Summaries are generated and may contain mistakes; the official description above is the record.