# CVE-2021-1946: Null dereference in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile

> A null pointer dereference in Qualcomm Snapdragon firmware allows attackers to cause a denial of service via crafted SDP body processing.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/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:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Sep 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-3mp3-2m7f-5wff

## What is CVE-2021-1946?

CVE-2021-1946 is a critical vulnerability in Qualcomm Apq8017 Firmware, published on 9 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Null Pointer Dereference may occur due to improper validation while processing crafted SDP body in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2021-1946?

It affects 98 products.


Products: Qualcomm Apq8017 Firmware, Qualcomm Apq8053 Firmware, Qualcomm Aqt1000 Firmware, Qualcomm Ar8035 Firmware, Qualcomm Msm8917 Firmware, Qualcomm Msm8920 Firmware, Qualcomm Msm8940 Firmware, Qualcomm Msm8953 Firmware, Qualcomm Qca6174a Firmware, Qualcomm Qca6390 Firmware, Qualcomm Qca6391 Firmware, Qualcomm Qca6420 Firmware, Qualcomm Qca6421 Firmware, Qualcomm Qca6426 Firmware, Qualcomm Qca6430 Firmware, Qualcomm Qca6431 Firmware, Qualcomm Qca6436 Firmware, Qualcomm Qca6574a Firmware, Qualcomm Qca6574au Firmware, Qualcomm Qca6595au Firmware and 78 more.

## How do I fix CVE-2021-1946?

No fix has been published for CVE-2021-1946 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-1946 being exploited?

There is no known exploitation of CVE-2021-1946 in the wild and no public exploit code.

## Other vulnerabilities in Qualcomm Apq8017 Firmware

- [CVE-2025-21483](https://insights.sbomify.com/CVE-2025-21483/): Improper Restriction of Operations within the Bounds of a Memory Buffer in Data Network Stack & Connectivity (critical 9.8)
- [CVE-2021-1933](https://insights.sbomify.com/CVE-2021-1933/): Denial of service in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Wearables (critical 9.8)
- [CVE-2020-11176](https://insights.sbomify.com/CVE-2020-11176/): Memory corruption in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon IoT, Snapdragon Mobile (critical 9.8)
- [CVE-2020-11291](https://insights.sbomify.com/CVE-2020-11291/): Memory corruption in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon IoT, Snapdragon Mobile (critical 9.8)
- [CVE-2020-11163](https://insights.sbomify.com/CVE-2020-11163/): Memory corruption in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-1946 and fix it if it is affected.

What it is: CVE-2021-1946 is a critical vulnerability in Qualcomm Apq8017 Firmware, published on 9 Sep 2021. 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-2021-1946 in the wild and no public exploit code.

Affected product: Qualcomm Apq8017 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-2021-1946/ (Markdown: https://insights.sbomify.com/CVE-2021-1946/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-1946
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-1946
- OSV: https://osv.dev/vulnerability/CVE-2021-1946

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-1946/
Summaries are generated and may contain mistakes; the official description above is the record.