# CVE-2025-21430: Buffer Over-read in WLAN Host

> A buffer over-read in the WLAN host allows a transient denial of service when connecting a station to an access point.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 7 Apr 2025
- **Updated:** 7 Apr 2025
- **Also known as:** 3910625, A-388047866, ASB-A-388047866, GHSA-c8ww-p8qh-gjr8

## What is CVE-2025-21430?

CVE-2025-21430 is a high-severity denial of service vulnerability in Qualcomm 315 5g Iot Modem Firmware, published on 7 Apr 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Transient DOS while connecting STA to AP and initiating ADD TS request from AP to establish TSpec session.

Weakness: CWE-126 (Buffer Over-read)

## Which versions are affected by CVE-2025-21430?

It affects 225 products.


Products: Qualcomm 315 5g Iot Modem Firmware, Qualcomm Apq8017 Firmware, Qualcomm Apq8064au Firmware, Qualcomm Aqt1000 Firmware, Qualcomm Ar8031 Firmware, Qualcomm Ar8035 Firmware, Qualcomm Csra6620 Firmware, Qualcomm Csra6640 Firmware, Qualcomm Csrb31024 Firmware, Qualcomm Fastconnect 6200 Firmware, Qualcomm Fastconnect 6700 Firmware, Qualcomm Fastconnect 6800 Firmware, Qualcomm Fastconnect 6900 Firmware, Qualcomm Fastconnect 7800 Firmware, Qualcomm Flight Rb5 5g Platform Firmware, Qualcomm Mdm9628 Firmware, Qualcomm Mdm9640 Firmware, Qualcomm Msm8996au Firmware, Qualcomm Qam8255p Firmware, Qualcomm Qam8295p Firmware and 205 more.

## How do I fix CVE-2025-21430?

Apply the vendor's patch.

## Is CVE-2025-21430 being exploited?

There is no known exploitation of CVE-2025-21430 in the wild and no public exploit code.

## Other vulnerabilities in Qualcomm 315 5g Iot Modem Firmware

- [CVE-2023-33107](https://insights.sbomify.com/CVE-2023-33107/): Qualcomm Multiple Chipsets Integer Overflow (high 8.4, exploited in the wild)
- [CVE-2023-33063](https://insights.sbomify.com/CVE-2023-33063/): Qualcomm Multiple Chipsets Use-After-Free (high 7.8, exploited in the wild)
- [CVE-2025-27034](https://insights.sbomify.com/CVE-2025-27034/): Improper Validation of Array Index in Multi-Mode Call Processor (critical 9.8)
- [CVE-2023-22388](https://insights.sbomify.com/CVE-2023-22388/): Use of Out-of-range Pointer Offset in Multi-mode Call Processor (critical 9.8)
- [CVE-2023-28578](https://insights.sbomify.com/CVE-2023-28578/): Improper Input Validation in Services (critical 9.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-21430 and fix it if it is affected.

What it is: CVE-2025-21430 is a high-severity denial of service vulnerability in Qualcomm 315 5g Iot Modem Firmware, published on 7 Apr 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-21430 in the wild and no public exploit code.

Affected product: Qualcomm 315 5g Iot Modem 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-2025-21430/ (Markdown: https://insights.sbomify.com/CVE-2025-21430/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-21430
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-21430
- OSV: https://osv.dev/vulnerability/CVE-2025-21430

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-21430/
Summaries are generated and may contain mistakes; the official description above is the record.