# CVE-2021-35123: Memory corruption in Snapdragon Connectivity, Snapdragon Industrial IOT

> A buffer overflow in Snapdragon Connectivity allows attackers to execute arbitrary code or escalate privileges via malicious over-the-air data.

- **Severity:** High 8.8 (`CVSS:3.1/AV:A/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:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 14 Jun 2022
- **Updated:** 4 Aug 2024
- **Also known as:** 3032290, A-213239948, ASB-A-213239948, GHSA-88pj-4633-qpww

## What is CVE-2021-35123?

CVE-2021-35123 is a high-severity memory corruption 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

Buffer copy in GATT multi notification due to improper length check for the data coming over-the-air in Snapdragon Connectivity, Snapdragon Industrial IOT

## Which versions are affected by CVE-2021-35123?

It affects 32 products.


Products: Qualcomm Aqt1000 Firmware, Qualcomm Qca6390 Firmware, Qualcomm Qca6391 Firmware, Qualcomm Sd480 Firmware, Qualcomm Sd660 Firmware, Qualcomm Sd778g Firmware, Qualcomm Sd780g Firmware, Qualcomm Sd855 Firmware, Qualcomm Sd865 5g Firmware, Qualcomm Sd870 Firmware, Qualcomm Sd888 5g Firmware, Qualcomm Sd 8 Gen1 5g Firmware, Qualcomm Sdx55m Firmware, Qualcomm Sm6375 Firmware, Qualcomm Sm7325p Firmware, Qualcomm Wcd9335 Firmware, Qualcomm Wcd9370 Firmware, Qualcomm Wcd9375 Firmware, Qualcomm Wcd9380 Firmware, Qualcomm Wcd9385 Firmware and 12 more.

## How do I fix CVE-2021-35123?

Apply the vendor's patch.

## Is CVE-2021-35123 being exploited?

There is no known exploitation of CVE-2021-35123 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-2021-35123 and fix it if it is affected.

What it is: CVE-2021-35123 is a high-severity memory corruption 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-2021-35123 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-2021-35123/ (Markdown: https://insights.sbomify.com/CVE-2021-35123/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-35123
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-35123
- OSV: https://osv.dev/vulnerability/CVE-2021-35123

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-35123/
Summaries are generated and may contain mistakes; the official description above is the record.