# CVE-2025-21476: Buffer Copy Without Checking Size of Input in Computer Vision

> Memory corruption in Qualcomm Snapdragon firmware allows attackers to execute arbitrary code or escalate privileges during Trusted Virtual Machine handshakes.

- **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:** 24 Sep 2025
- **Updated:** 26 Feb 2026
- **Also known as:** GHSA-m9g8-x7f2-2hgc

## What is CVE-2025-21476?

CVE-2025-21476 is a high-severity memory corruption vulnerability in Qualcomm Qca6391 Firmware, published on 24 Sep 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Memory corruption when passing parameters to the Trusted Virtual Machine during the handshake.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input)

## Which versions are affected by CVE-2025-21476?

It affects 42 products.


Products: Qualcomm Qca6391 Firmware, Qualcomm Qca6698aq Firmware, Qualcomm Qcm5430 Firmware, Qualcomm Qcm6490 Firmware, Qualcomm Qcm8550 Firmware, Qualcomm Qcn9011 Firmware, Qualcomm Qcn9012 Firmware, Qualcomm Qcn9274 Firmware, Qualcomm Qcs5430 Firmware, Qualcomm Qcs615 Firmware, Qualcomm Qcs6490 Firmware, Qualcomm Qcs8550 Firmware, Qualcomm Qcs9100 Firmware, Qualcomm Sg8275 Firmware, Qualcomm Sg8275p Firmware, Qualcomm Sm6650 Firmware, Qualcomm Sm7635 Firmware, Qualcomm Sm7675 Firmware, Qualcomm Sm7675p Firmware, Qualcomm Sm8550 Firmware and 22 more.

## How do I fix CVE-2025-21476?

No fix has been published for CVE-2025-21476 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-21476 being exploited?

There is no known exploitation of CVE-2025-21476 in the wild and no public exploit code.

## Other vulnerabilities in Qualcomm Qca6391 Firmware

- [CVE-2023-21630](https://insights.sbomify.com/CVE-2023-21630/): Integer Overflow in Multimedia Framework (high 8.4)
- [CVE-2021-35134](https://insights.sbomify.com/CVE-2021-35134/): Memory corruption in Snapdragon Connectivity, Snapdragon Industrial IOT, Snapdragon Mobile (high 8.4)
- [CVE-2021-30283](https://insights.sbomify.com/CVE-2021-30283/): Denial of service in Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile (high 7.1)
- [CVE-2023-21655](https://insights.sbomify.com/CVE-2023-21655/): Integer Overflow or Wraparound in Display (medium 6.7)
- [CVE-2021-1918](https://insights.sbomify.com/CVE-2021-1918/): Information disclosure in Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-21476 and fix it if it is affected.

What it is: CVE-2025-21476 is a high-severity memory corruption vulnerability in Qualcomm Qca6391 Firmware, published on 24 Sep 2025. 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-2025-21476 in the wild and no public exploit code.

Affected product: Qualcomm Qca6391 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-2025-21476/ (Markdown: https://insights.sbomify.com/CVE-2025-21476/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-21476
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-21476
- OSV: https://osv.dev/vulnerability/CVE-2025-21476

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-21476/
Summaries are generated and may contain mistakes; the official description above is the record.