# CVE-2021-35101: Denial of service in Snapdragon Auto, Snapdragon Compute, Snapdragon Mobile

> Improper handling of virtual GICR control writes causes hypervisor assertion failures, leading to denial of service in Snapdragon devices.

- **Severity:** High 7.1 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/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:** 14 Jun 2022
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-jcvr-2w9w-x2rh

## What is CVE-2021-35101?

CVE-2021-35101 is a high-severity denial of service vulnerability in Qualcomm Aqt1000 Firmware, published on 14 Jun 2022. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Improper handling of writes to virtual GICR control can lead to assertion failure in the hypervisor in Snapdragon Auto, Snapdragon Compute, Snapdragon Mobile

Weakness: CWE-617 (Reachable Assertion)

## Which versions are affected by CVE-2021-35101?

It affects 24 products.


Products: Qualcomm Aqt1000 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 Sa8540p Firmware, Qualcomm Sa9000p Firmware, Qualcomm Sd865 5g Firmware, Qualcomm Sd870 Firmware, Qualcomm Sd888 5g Firmware, Qualcomm Sd 8cx Firmware, Qualcomm Sd 8cx Gen2 Firmware, Qualcomm Sdx55m Firmware, Qualcomm Sdxr2 5g Firmware, Qualcomm Wcd9340 Firmware, Qualcomm Wcd9341 Firmware and 4 more.

## How do I fix CVE-2021-35101?

No fix has been published for CVE-2021-35101 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-35101 being exploited?

There is no known exploitation of CVE-2021-35101 in the wild and no public exploit code.

## Other vulnerabilities in Qualcomm Aqt1000 Firmware

- [CVE-2025-21479](https://insights.sbomify.com/CVE-2025-21479/): Qualcomm Multiple Chipsets Incorrect Authorization (high 8.6, exploited in the wild)
- [CVE-2025-21480](https://insights.sbomify.com/CVE-2025-21480/): Qualcomm Multiple Chipsets Incorrect Authorization (high 8.6, exploited in the wild)
- [CVE-2023-28562](https://insights.sbomify.com/CVE-2023-28562/): Buffer Copy Without Checking Size of Input in QESL (critical 9.8)
- [CVE-2022-40514](https://insights.sbomify.com/CVE-2022-40514/): Buffer copy without checking size of input in WLAN Firmware (critical 9.8)
- [CVE-2022-22096](https://insights.sbomify.com/CVE-2022-22096/): Memory corruption in Snapdragon Connectivity, Snapdragon Mobile (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-35101 and fix it if it is affected.

What it is: CVE-2021-35101 is a high-severity denial of service vulnerability in Qualcomm Aqt1000 Firmware, published on 14 Jun 2022. 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-2021-35101 in the wild and no public exploit code.

Affected product: Qualcomm Aqt1000 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-2021-35101/ (Markdown: https://insights.sbomify.com/CVE-2021-35101/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-35101
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-35101
- OSV: https://osv.dev/vulnerability/CVE-2021-35101

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-35101/
Summaries are generated and may contain mistakes; the official description above is the record.