# CVE-2025-27034: Improper Validation of Array Index in Multi-Mode Call Processor

> An attacker can exploit improper array index validation in Qualcomm Snapdragon firmware to cause memory corruption, potentially leading to code execution or privilege escalation.

- **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:** 24 Sep 2025
- **Updated:** 26 Feb 2026
- **Also known as:** GHSA-h8cv-cjqh-899m

## What is CVE-2025-27034?

CVE-2025-27034 is a critical memory corruption vulnerability in Qualcomm 315 5g Iot Modem Firmware, published on 24 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Memory corruption while selecting the PLMN from SOR failed list.

Weakness: CWE-129 (Improper Validation of Array Index)

## Which versions are affected by CVE-2025-27034?

It affects 113 products.


Products: Qualcomm 315 5g Iot Modem Firmware, Qualcomm Ar8035 Firmware, Qualcomm Fastconnect 6200 Firmware, Qualcomm Fastconnect 6700 Firmware, Qualcomm Fastconnect 6800 Firmware, Qualcomm Fastconnect 6900 Firmware, Qualcomm Fastconnect 7800 Firmware, Qualcomm Qca6174a Firmware, Qualcomm Qca6391 Firmware, Qualcomm Qca6574a Firmware, Qualcomm Qca6584au Firmware, Qualcomm Qca6595au Firmware, Qualcomm Qca6696 Firmware, Qualcomm Qca6698aq Firmware, Qualcomm Qca8081 Firmware, Qualcomm Qca8337 Firmware, Qualcomm Qcc710 Firmware, Qualcomm Qcm4490 Firmware, Qualcomm Qcm5430 Firmware, Qualcomm Qcm6490 Firmware and 93 more.

## How do I fix CVE-2025-27034?

No fix has been published for CVE-2025-27034 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-27034 being exploited?

There is no known exploitation of CVE-2025-27034 in the wild and no public exploit code.

## Other vulnerabilities in Qualcomm 315 5g Iot Modem Firmware

- [CVE-2023-33107](https://insights.sbomify.com/CVE-2023-33107/): Qualcomm Multiple Chipsets Integer Overflow (high 8.4, exploited in the wild)
- [CVE-2023-33063](https://insights.sbomify.com/CVE-2023-33063/): Qualcomm Multiple Chipsets Use-After-Free (high 7.8, exploited in the wild)
- [CVE-2023-22388](https://insights.sbomify.com/CVE-2023-22388/): Use of Out-of-range Pointer Offset in Multi-mode Call Processor (critical 9.8)
- [CVE-2023-28578](https://insights.sbomify.com/CVE-2023-28578/): Improper Input Validation in Services (critical 9.3)
- [CVE-2023-33072](https://insights.sbomify.com/CVE-2023-33072/): Buffer copy without checking size of Input in Core (critical 9.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-27034 and fix it if it is affected.

What it is: CVE-2025-27034 is a critical memory corruption vulnerability in Qualcomm 315 5g Iot Modem Firmware, published on 24 Sep 2025. 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-2025-27034 in the wild and no public exploit code.

Affected product: Qualcomm 315 5g Iot Modem 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-2025-27034/ (Markdown: https://insights.sbomify.com/CVE-2025-27034/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-27034
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-27034
- OSV: https://osv.dev/vulnerability/CVE-2025-27034

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-27034/
Summaries are generated and may contain mistakes; the official description above is the record.