# CVE-2025-21455: Time-of-check Time-of-use (TOCTOU) Race Condition in Camera_Linux

> A race condition in the Camera_Linux driver allows memory corruption via IOCTL, potentially enabling code execution or privilege escalation on Snapdragon devices.

- **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:** No
- **Published:** 6 Aug 2025
- **Updated:** 26 Feb 2026
- **Also known as:** GHSA-h7p6-fc49-hc5h

## What is CVE-2025-21455?

CVE-2025-21455 is a high-severity vulnerability in Qualcomm Fastconnect 6800 Firmware, published on 6 Aug 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Memory corruption while submitting blob data to kernel space though IOCTL.

Weakness: CWE-367 (Time-of-check Time-of-use (TOCTOU) Race Condition)

## Which versions are affected by CVE-2025-21455?

It affects 29 products.


Products: Qualcomm Fastconnect 6800 Firmware, Qualcomm Fastconnect 6900 Firmware, Qualcomm Fastconnect 7800 Firmware, Qualcomm Qca6391 Firmware, Qualcomm Qca6426 Firmware, Qualcomm Qca6436 Firmware, Qualcomm Qsm8250 Firmware, Qualcomm Sd865 5g Firmware, Qualcomm Sdx55 Firmware, Qualcomm Snapdragon 865\+ 5g Mobile Platform \(Sm8250-Ab\) Firmware, Qualcomm Snapdragon 865 5g Mobile Platform Firmware, Qualcomm Snapdragon 870 5g Mobile Platform \(Sm8250-Ac\) Firmware, Qualcomm Snapdragon 8 Gen 1 Mobile Platform Firmware, Qualcomm Snapdragon X55 5g Modem-Rf System Firmware, Qualcomm Snapdragon Xr2 5g Platform Firmware, Qualcomm Sw5100 Firmware, Qualcomm Sw5100p Firmware, Qualcomm Sxr2130 Firmware, Qualcomm Sxr2230p Firmware, Qualcomm Sxr2250p Firmware and 9 more.

## How do I fix CVE-2025-21455?

No fix has been published for CVE-2025-21455 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-21455 being exploited?

There is no known exploitation of CVE-2025-21455 in the wild and no public exploit code.

## Other vulnerabilities in Qualcomm Fastconnect 6800 Firmware

- [CVE-2023-28581](https://insights.sbomify.com/CVE-2023-28581/): Improper Restriction of Operations within the Bounds of a Memory Buffer in WLAN Firmware (critical 9.8)
- [CVE-2025-27037](https://insights.sbomify.com/CVE-2025-27037/): Use After Free in Camera Driver (high 7.8)
- [CVE-2025-21474](https://insights.sbomify.com/CVE-2025-21474/): Use After Free in BTHOST (high 7.8)
- [CVE-2024-45566](https://insights.sbomify.com/CVE-2024-45566/): Use After Free in Camera Driver (high 7.8)
- [CVE-2024-33069](https://insights.sbomify.com/CVE-2024-33069/): Use After Free in WLAN Host (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-21455 and fix it if it is affected.

What it is: CVE-2025-21455 is a high-severity vulnerability in Qualcomm Fastconnect 6800 Firmware, published on 6 Aug 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-2025-21455 in the wild and no public exploit code.

Affected product: Qualcomm Fastconnect 6800 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-2025-21455/ (Markdown: https://insights.sbomify.com/CVE-2025-21455/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-21455
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-21455
- OSV: https://osv.dev/vulnerability/CVE-2025-21455

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-21455/
Summaries are generated and may contain mistakes; the official description above is the record.