# CVE-2025-68255: staging: rtl8723bs: fix stack buffer overflow in OnAssocReq IE parsing

> A stack buffer overflow in the rtl8723bs Wi-Fi driver allows remote attackers to cause kernel corruption or execute code via malformed association requests.

- **Severity:** High 8.8 (`CVSS:3.1/AV:A/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:** Yes
- **Published:** 16 Dec 2025
- **Updated:** 5 Aug 2026
- **Also known as:** BELL-CVE-2025-68255, DEBIAN-CVE-2025-68255, GHSA-prq3-3cx6-vrj4, ROOT-OS-DEBIAN-11-CVE-2025-68255, ROOT-OS-DEBIAN-12-CVE-2025-68255, ROOT-OS-DEBIAN-13-CVE-2025-68255, ROOT-OS-UBUNTU-2204-CVE-2025-68255, ROOT-OS-UBUNTU-2404-CVE-2025-68255, UBUNTU-CVE-2025-68255

## What is CVE-2025-68255?

CVE-2025-68255 is a high-severity memory corruption vulnerability in Linux, published on 16 Dec 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

In the Linux kernel, the following vulnerability has been resolved:

staging: rtl8723bs: fix stack buffer overflow in OnAssocReq IE parsing

The Supported Rates IE length from an incoming Association Request frame
was used directly as the memcpy() length when copying into a fixed-size
16-byte stack buffer (supportRate). A malicious station can advertise an
IE length larger than 16 bytes, causing a stack buffer overflow.

Clamp ie_len to the buffer size before copying the Supported Rates IE,
and correct the bounds check when merging Extended Supported Rates to
prevent a second potential overflow.

This prevents kernel stack corruption triggered by malformed association
requests.

## Which versions are affected by CVE-2025-68255?


## How do I fix CVE-2025-68255?

Apply the vendor's patch.

## Is CVE-2025-68255 being exploited?

There is no known exploitation of CVE-2025-68255 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-68255 and fix it if it is affected.

What it is: CVE-2025-68255 is a high-severity memory corruption vulnerability in Linux, published on 16 Dec 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-2025-68255 in the wild and no public exploit code.

Affected product: Linux. 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-2025-68255/ (Markdown: https://insights.sbomify.com/CVE-2025-68255/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-68255
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-68255
- OSV: https://osv.dev/vulnerability/CVE-2025-68255

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-68255/
Summaries are generated and may contain mistakes; the official description above is the record.