# CVE-2022-40520: Stack based buffer overflow in Core

> A stack-based buffer overflow in Qualcomm Snapdragon firmware allows attackers to execute arbitrary code or escalate privileges.

- **Severity:** High 8.4 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Jan 2023
- **Updated:** 9 Apr 2025
- **Also known as:** GHSA-gmmh-m76r-369x

## What is CVE-2022-40520?

CVE-2022-40520 is a high-severity memory corruption vulnerability in Qualcomm Apq8064au Firmware, published on 6 Jan 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Memory corruption due to stack-based buffer overflow in Core

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

## Which versions are affected by CVE-2022-40520?

It affects 147 products.


Products: Qualcomm Apq8064au Firmware, Qualcomm Apq8096au Firmware, Qualcomm Aqt1000 Firmware, Qualcomm Ar8035 Firmware, Qualcomm Csrb31024 Firmware, Qualcomm Fsm10056 Firmware, Qualcomm Mdm9150 Firmware, Qualcomm Mdm9205 Firmware, Qualcomm Mdm9640 Firmware, Qualcomm Mdm9650 Firmware, Qualcomm Msm8996au Firmware, Qualcomm Qam8295p Firmware, Qualcomm Qca4004 Firmware, Qualcomm Qca6174a Firmware, Qualcomm Qca6310 Firmware, Qualcomm Qca6320 Firmware, Qualcomm Qca6335 Firmware, Qualcomm Qca6390 Firmware, Qualcomm Qca6391 Firmware, Qualcomm Qca6420 Firmware and 127 more.

## How do I fix CVE-2022-40520?

No fix has been published for CVE-2022-40520 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-40520 being exploited?

There is no known exploitation of CVE-2022-40520 in the wild and no public exploit code.

## Other vulnerabilities in Qualcomm Apq8064au Firmware

- [CVE-2022-33219](https://insights.sbomify.com/CVE-2022-33219/): Integer Overflow to Buffer Overflow in Automotive (critical 9.3)
- [CVE-2023-21643](https://insights.sbomify.com/CVE-2023-21643/): Untrusted Pointer Dereference in Automotive (critical 9.1)
- [CVE-2025-27074](https://insights.sbomify.com/CVE-2025-27074/): Incorrect Calculation of Buffer Size in SCE-Mink (high 8.8)
- [CVE-2023-33021](https://insights.sbomify.com/CVE-2023-33021/): Use After Free in Graphics (high 8.4)
- [CVE-2023-21632](https://insights.sbomify.com/CVE-2023-21632/): Stack-based Buffer Overflow in Automotive GPU (high 8.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-40520 and fix it if it is affected.

What it is: CVE-2022-40520 is a high-severity memory corruption vulnerability in Qualcomm Apq8064au Firmware, published on 6 Jan 2023. 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-2022-40520 in the wild and no public exploit code.

Affected product: Qualcomm Apq8064au Firmware. 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-2022-40520/ (Markdown: https://insights.sbomify.com/CVE-2022-40520/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-40520
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-40520
- OSV: https://osv.dev/vulnerability/CVE-2022-40520

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From sbomify Insights: https://insights.sbomify.com/CVE-2022-40520/
Summaries are generated and may contain mistakes; the official description above is the record.