# CVE-2023-21639: Buffer Copy Without Checking the Size of Input in Audio

> Attacker can trigger memory corruption in Qualcomm Snapdragon audio processing, potentially leading to code execution or privilege escalation.

- **Severity:** Medium 6.7 (`CVSS:3.1/AV:L/AC:L/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:** 4 Jul 2023
- **Updated:** 2 Aug 2024
- **Also known as:** GHSA-5ww7-v94g-g36v

## What is CVE-2023-21639?

CVE-2023-21639 is a medium-severity memory corruption vulnerability in Qualcomm Aqt1000 Firmware, published on 4 Jul 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Memory corruption in Audio while processing sva_model_serializer using memory size passed by HIDL client.

Weakness: CWE-787 (Out-of-bounds Write), CWE-120 (Buffer Copy without Checking Size of Input)

## Which versions are affected by CVE-2023-21639?

It affects 22 products.


Products: Qualcomm Aqt1000 Firmware, Qualcomm Fastconnect 6200 Firmware, Qualcomm Qca6420 Firmware, Qualcomm Qca6430 Firmware, Qualcomm Sa4150p Firmware, Qualcomm Sa4155p Firmware, Qualcomm Sa6155p Firmware, Qualcomm Sa8155p Firmware, Qualcomm Sa8195p Firmware, Qualcomm Sd855 Firmware, Qualcomm Snapdragon 855\+\/860 Firmware, Qualcomm Snapdragon 855 Firmware, Qualcomm Snapdragon W5\+ Gen 1 Firmware, Qualcomm Sw5100 Firmware, Qualcomm Sw5100p Firmware, Qualcomm Wcd9341 Firmware, Qualcomm Wcn3980 Firmware, Qualcomm Wcn3988 Firmware, Qualcomm Wsa8810 Firmware, Qualcomm Wsa8815 Firmware and 2 more.

## How do I fix CVE-2023-21639?

No fix has been published for CVE-2023-21639 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-21639 being exploited?

There is no known exploitation of CVE-2023-21639 in the wild and no public exploit code.

## Other vulnerabilities in Qualcomm Aqt1000 Firmware

- [CVE-2025-21479](https://insights.sbomify.com/CVE-2025-21479/): Qualcomm Multiple Chipsets Incorrect Authorization (high 8.6, exploited in the wild)
- [CVE-2025-21480](https://insights.sbomify.com/CVE-2025-21480/): Qualcomm Multiple Chipsets Incorrect Authorization (high 8.6, exploited in the wild)
- [CVE-2023-28562](https://insights.sbomify.com/CVE-2023-28562/): Buffer Copy Without Checking Size of Input in QESL (critical 9.8)
- [CVE-2022-40514](https://insights.sbomify.com/CVE-2022-40514/): Buffer copy without checking size of input in WLAN Firmware (critical 9.8)
- [CVE-2022-22096](https://insights.sbomify.com/CVE-2022-22096/): Memory corruption in Snapdragon Connectivity, Snapdragon Mobile (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-21639 and fix it if it is affected.

What it is: CVE-2023-21639 is a medium-severity memory corruption vulnerability in Qualcomm Aqt1000 Firmware, published on 4 Jul 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-2023-21639 in the wild and no public exploit code.

Affected product: Qualcomm Aqt1000 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-2023-21639/ (Markdown: https://insights.sbomify.com/CVE-2023-21639/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-21639
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-21639
- OSV: https://osv.dev/vulnerability/CVE-2023-21639

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From sbomify Insights: https://insights.sbomify.com/CVE-2023-21639/
Summaries are generated and may contain mistakes; the official description above is the record.