# CVE-2021-35087: Null dereference in Snapdragon Industrial IOT, Snapdragon Mobile

> Attackers can cause a denial of service via null pointer dereference in Snapdragon Industrial IoT and Mobile firmware due to improper validation.

- **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:** No
- **Published:** 14 Jun 2022
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-f9vg-j4h6-x22w

## What is CVE-2021-35087?

CVE-2021-35087 is a high-severity vulnerability in Qualcomm Ar8035 Firmware, published on 14 Jun 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Possible null pointer access due to improper validation of system information message to be processed in Snapdragon Industrial IOT, Snapdragon Mobile

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2021-35087?

It affects 41 products.


Products: Qualcomm Ar8035 Firmware, Qualcomm Qca6390 Firmware, Qualcomm Qca6391 Firmware, Qualcomm Qca8081 Firmware, Qualcomm Qca8337 Firmware, Qualcomm Qcm6490 Firmware, Qualcomm Qcs6490 Firmware, Qualcomm Sd480 Firmware, Qualcomm Sd690 5g Firmware, Qualcomm Sd695 Firmware, Qualcomm Sd765 Firmware, Qualcomm Sd765g Firmware, Qualcomm Sd768g Firmware, Qualcomm Sd778g Firmware, Qualcomm Sd780g Firmware, Qualcomm Sd865 5g Firmware, Qualcomm Sd870 Firmware, Qualcomm Sd888 5g Firmware, Qualcomm Sd 8 Gen1 5g Firmware, Qualcomm Sdx55 Firmware and 21 more.

## How do I fix CVE-2021-35087?

No fix has been published for CVE-2021-35087 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-35087 being exploited?

There is no known exploitation of CVE-2021-35087 in the wild and no public exploit code.

## Other vulnerabilities in Qualcomm Ar8035 Firmware

- [CVE-2023-33106](https://insights.sbomify.com/CVE-2023-33106/): Qualcomm Multiple Chipsets Use of Out-of-Range Pointer Offset (high 8.4, exploited in the wild)
- [CVE-2024-45569](https://insights.sbomify.com/CVE-2024-45569/): Improper Validation of Array Index in WLAN Host Communication (critical 9.8)
- [CVE-2024-21473](https://insights.sbomify.com/CVE-2024-21473/): Improper Input Validation in WIN SON (critical 9.8)
- [CVE-2023-28582](https://insights.sbomify.com/CVE-2023-28582/): Buffer Copy Without Checking Size of Input in Data Modem (critical 9.8)
- [CVE-2023-43552](https://insights.sbomify.com/CVE-2023-43552/): Use After Free in WLAN Host Communication (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-35087 and fix it if it is affected.

What it is: CVE-2021-35087 is a high-severity vulnerability in Qualcomm Ar8035 Firmware, published on 14 Jun 2022. 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-2021-35087 in the wild and no public exploit code.

Affected product: Qualcomm Ar8035 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-2021-35087/ (Markdown: https://insights.sbomify.com/CVE-2021-35087/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-35087
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-35087
- OSV: https://osv.dev/vulnerability/CVE-2021-35087

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-35087/
Summaries are generated and may contain mistakes; the official description above is the record.