# CVE-2025-20672: Memory corruption in MT7902, MT7921, MT7922, MT7925, MT7927

> A local attacker can exploit an out-of-bounds write in the Bluetooth driver to escalate privileges without user interaction.

- **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:** 2 Jun 2025
- **Updated:** 26 Feb 2026
- **Also known as:** GHSA-hw75-9xrf-7fg8

## What is CVE-2025-20672?

CVE-2025-20672 is a critical memory corruption vulnerability in MediaTek, Inc. MT7902, MT7921, MT7922, MT7925, MT7927, published on 2 Jun 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

In Bluetooth driver, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00412257; Issue ID: MSV-3292.

Weakness: CWE-122 (Heap-based Buffer Overflow)

## Which versions are affected by CVE-2025-20672?

It affects 5 products.


Products: Mediatek Mt7902 Firmware, Mediatek Mt7921 Firmware, Mediatek Mt7922 Firmware, Mediatek Mt7925 Firmware, Mediatek Mt7927 Firmware.

## How do I fix CVE-2025-20672?

No fix has been published for CVE-2025-20672 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-20672 being exploited?

There is no known exploitation of CVE-2025-20672 in the wild and no public exploit code.

## Other vulnerabilities in MediaTek, Inc. MT7902, MT7921, MT7922, MT7925, MT7927

- [CVE-2026-20495](https://insights.sbomify.com/CVE-2026-20495/): Missing authorization in MediaTek chipset (high 7.8)
- [CVE-2026-20482](https://insights.sbomify.com/CVE-2026-20482/): Denial of service in MediaTek chipset (medium 6.5)
- [CVE-2026-20456](https://insights.sbomify.com/CVE-2026-20456/): Memory corruption in MediaTek chipset (medium 5.5)
- [CVE-2025-20673](https://insights.sbomify.com/CVE-2025-20673/): Null dereference in MT7902, MT7921, MT7922, MT7925, MT7927 (medium 5.5)
- [CVE-2025-20675](https://insights.sbomify.com/CVE-2025-20675/): Null dereference in MT7902, MT7921, MT7922, MT7925, MT7927 (medium 5.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-20672 and fix it if it is affected.

What it is: CVE-2025-20672 is a critical memory corruption vulnerability in MediaTek, Inc. MT7902, MT7921, MT7922, MT7925, MT7927, published on 2 Jun 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-2025-20672 in the wild and no public exploit code.

Affected product: MediaTek, Inc. MT7902, MT7921, MT7922, MT7925, MT7927. 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-2025-20672/ (Markdown: https://insights.sbomify.com/CVE-2025-20672/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-20672
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-20672
- OSV: https://osv.dev/vulnerability/CVE-2025-20672

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-20672/
Summaries are generated and may contain mistakes; the official description above is the record.