# CVE-2021-35134: Memory corruption in Snapdragon Connectivity, Snapdragon Industrial IOT, Snapdragon Mobile

> Insufficient ELF header validation in Snapdragon Boot allows memory corruption, potentially enabling code execution or privilege escalation on affected devices.

- **Severity:** High 8.4 (`CVSS:3.1/AV:L/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:** No
- **Published:** 2 Sep 2022
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-39x7-j43f-hqfr

## What is CVE-2021-35134?

CVE-2021-35134 is a high-severity memory corruption vulnerability in Qualcomm Qca6391 Firmware, published on 2 Sep 2022. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Due to insufficient validation of ELF headers, an Incorrect Calculation of Buffer Size can occur in Boot leading to memory corruption in Snapdragon Connectivity, Snapdragon Industrial IOT, Snapdragon Mobile

Weakness: CWE-131 (Incorrect Calculation of Buffer Size)

## Which versions are affected by CVE-2021-35134?

It affects 30 products.


Products: Qualcomm Qca6391 Firmware, Qualcomm Qcm6490 Firmware, Qualcomm Qcs6490 Firmware, Qualcomm Qsm8350 Firmware, Qualcomm Sd778g Firmware, Qualcomm Sd780g Firmware, Qualcomm Sd888 5g Firmware, Qualcomm Sd888 Firmware, Qualcomm Sd 8 Gen1 5g Firmware, Qualcomm Sm7315 Firmware, Qualcomm Sm7325p Firmware, Qualcomm Sm7450 Firmware, Qualcomm Sm8475 Firmware, Qualcomm Sm8475p Firmware, Qualcomm Wcd9341 Firmware, Qualcomm Wcd9370 Firmware, Qualcomm Wcd9375 Firmware, Qualcomm Wcd9380 Firmware, Qualcomm Wcd9385 Firmware, Qualcomm Wcn6740 Firmware and 10 more.

## How do I fix CVE-2021-35134?

No fix has been published for CVE-2021-35134 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-35134 being exploited?

There is no known exploitation of CVE-2021-35134 in the wild and no public exploit code.

## Other vulnerabilities in Qualcomm Qca6391 Firmware

- [CVE-2023-21630](https://insights.sbomify.com/CVE-2023-21630/): Integer Overflow in Multimedia Framework (high 8.4)
- [CVE-2025-21476](https://insights.sbomify.com/CVE-2025-21476/): Buffer Copy Without Checking Size of Input in Computer Vision (high 7.8)
- [CVE-2021-30283](https://insights.sbomify.com/CVE-2021-30283/): Denial of service in Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile (high 7.1)
- [CVE-2023-21655](https://insights.sbomify.com/CVE-2023-21655/): Integer Overflow or Wraparound in Display (medium 6.7)
- [CVE-2021-1918](https://insights.sbomify.com/CVE-2021-1918/): Information disclosure in Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-35134 and fix it if it is affected.

What it is: CVE-2021-35134 is a high-severity memory corruption vulnerability in Qualcomm Qca6391 Firmware, published on 2 Sep 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-2021-35134 in the wild and no public exploit code.

Affected product: Qualcomm Qca6391 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-2021-35134/ (Markdown: https://insights.sbomify.com/CVE-2021-35134/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-35134
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-35134
- OSV: https://osv.dev/vulnerability/CVE-2021-35134

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-35134/
Summaries are generated and may contain mistakes; the official description above is the record.