# CVE-2023-21671: Improper Input Validation in Core

> Memory corruption in Qualcomm Snapdragon firmware allows attackers to execute arbitrary code or escalate privileges via improper input validation.

- **Severity:** Critical 9.3 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/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:** 7 Nov 2023
- **Updated:** 27 Feb 2025
- **Also known as:** GHSA-7p43-mhw4-pxh2

## What is CVE-2023-21671?

CVE-2023-21671 is a critical memory corruption vulnerability in Qualcomm Fastconnect 6700 Firmware, published on 7 Nov 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Memory Corruption in Core during syscall for Sectools Fuse comparison feature.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2023-21671?

It affects 24 products.


Products: Qualcomm Fastconnect 6700 Firmware, Qualcomm Fastconnect 6900 Firmware, Qualcomm Qca6391 Firmware, Qualcomm Qcm6490 Firmware, Qualcomm Qcs6490 Firmware, Qualcomm Qsm8350 Firmware, Qualcomm Sd888 Firmware, Qualcomm Sm7315 Firmware, Qualcomm Sm7325p Firmware, Qualcomm Snapdragon 778g\+ 5g Mobile Platform Firmware, Qualcomm Snapdragon 778g 5g Mobile Platform Firmware, Qualcomm Snapdragon 780g 5g Mobile Platform Firmware, Qualcomm Snapdragon 782g Mobile Platform Firmware, Qualcomm Snapdragon 7c\+ Gen 3 Compute Firmware, Qualcomm Snapdragon 888\+ 5g Mobile Platform  Firmware, Qualcomm Snapdragon 888 5g Mobile Platform Firmware, Qualcomm Video Collaboration Vc3 Platform Firmware, Qualcomm Wcd9370 Firmware, Qualcomm Wcd9375 Firmware, Qualcomm Wcd9380 Firmware and 4 more.

## How do I fix CVE-2023-21671?

No fix has been published for CVE-2023-21671 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-21671 being exploited?

There is no known exploitation of CVE-2023-21671 in the wild and no public exploit code.

## Other vulnerabilities in Qualcomm Fastconnect 6700 Firmware

- [CVE-2024-43047](https://insights.sbomify.com/CVE-2024-43047/): Qualcomm Multiple Chipsets Use-After-Free (high 7.8, exploited in the wild)
- [CVE-2024-21464](https://insights.sbomify.com/CVE-2024-21464/): Buffer Copy Without Checking Size of Input in Data Network Stack & Connectivity (high 8.4)
- [CVE-2024-33047](https://insights.sbomify.com/CVE-2024-33047/): Buffer Over-read in Display (high 8.4)
- [CVE-2024-23360](https://insights.sbomify.com/CVE-2024-23360/): Improper Access Control in Graphics Windows (high 8.4)
- [CVE-2024-23354](https://insights.sbomify.com/CVE-2024-23354/): Use After Free in Graphics Linux (high 8.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-21671 and fix it if it is affected.

What it is: CVE-2023-21671 is a critical memory corruption vulnerability in Qualcomm Fastconnect 6700 Firmware, published on 7 Nov 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-2023-21671 in the wild and no public exploit code.

Affected product: Qualcomm Fastconnect 6700 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-2023-21671/ (Markdown: https://insights.sbomify.com/CVE-2023-21671/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-21671
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-21671
- OSV: https://osv.dev/vulnerability/CVE-2023-21671

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From sbomify Insights: https://insights.sbomify.com/CVE-2023-21671/
Summaries are generated and may contain mistakes; the official description above is the record.