# CVE-2025-27042: Incorrect Calculation of Buffer Size in Video

> An integer overflow in Qualcomm Snapdragon video firmware allows memory corruption and potential code execution when processing video packets.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 8 Jul 2025
- **Updated:** 8 Jul 2025
- **Also known as:** 3935673, A-409047250, ASB-A-409047250, GHSA-m7f9-7vr6-8wcw

## What is CVE-2025-27042?

CVE-2025-27042 is a high-severity vulnerability in Qualcomm 315 5g Iot Modem Firmware, published on 8 Jul 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Memory corruption while processing video packets received from video firmware.

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

## Which versions are affected by CVE-2025-27042?

It affects 344 products.


Products: Qualcomm 215 Mobile Firmware, Qualcomm 315 5g Iot Modem Firmware, Qualcomm Aqt1000 Firmware, Qualcomm Ar8031 Firmware, Qualcomm Ar8035 Firmware, Qualcomm C-V2x 9150 Firmware, Qualcomm Csr8811 Firmware, Qualcomm Csra6620 Firmware, Qualcomm Csra6640 Firmware, Qualcomm Fastconnect 6200 Firmware, Qualcomm Fastconnect 6700 Firmware, Qualcomm Fastconnect 6800 Firmware, Qualcomm Fastconnect 6900 Firmware, Qualcomm Fastconnect 7800 Firmware, Qualcomm Flight Rb5 5g Firmware, Qualcomm Fsm10055 Firmware, Qualcomm Fsm10056 Firmware, Qualcomm Fsm20055 Firmware, Qualcomm Fsm20056 Firmware, Qualcomm Immersive Home 214 Firmware and 324 more.

## How do I fix CVE-2025-27042?

Apply the vendor's patch.

## Is CVE-2025-27042 being exploited?

There is no known exploitation of CVE-2025-27042 in the wild and no public exploit code.

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

- [CVE-2024-33060](https://insights.sbomify.com/CVE-2024-33060/): Use After Free in DSP Service (high 8.4)
- [CVE-2023-28547](https://insights.sbomify.com/CVE-2023-28547/): Buffer Copy Without Checking Size of Input in SPS Applications (high 8.4)
- [CVE-2023-33023](https://insights.sbomify.com/CVE-2023-33023/): Buffer Copy without Checking Size of Input (`Classic Buffer Overflow`) in SPS-Applications (high 8.4)
- [CVE-2023-43555](https://insights.sbomify.com/CVE-2023-43555/): Buffer Over-read in Video (high 8.2)
- [CVE-2025-21467](https://insights.sbomify.com/CVE-2025-21467/): Out-of-bounds Write in Computer Vision (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-27042 and fix it if it is affected.

What it is: CVE-2025-27042 is a high-severity vulnerability in Qualcomm 315 5g Iot Modem Firmware, published on 8 Jul 2025. 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-2025-27042 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-2025-27042/ (Markdown: https://insights.sbomify.com/CVE-2025-27042/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-27042
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-27042
- OSV: https://osv.dev/vulnerability/CVE-2025-27042

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-27042/
Summaries are generated and may contain mistakes; the official description above is the record.