SB2025072842 - Lenovo update for MediaTek Bluetooth driver

Description

This security bulletin contains information about 4 secuirty vulnerabilities.

1) Heap-based Buffer Overflow (CVE-ID: CVE-2025-20680)

The vulnerability allows a local application to execute arbitrary code.

The vulnerability exists due to an incorrect bounds check within Bluetooth. A local application can execute arbitrary code.

2) Out-of-bounds read (CVE-ID: CVE-2025-20687)

The vulnerability allows a local application to perform service disruption.

The vulnerability exists due to an incorrect bounds check within Bluetooth. A local application can perform service disruption.

3) Buffer Underwrite ('Buffer Underflow') (CVE-ID: CVE-2025-20694)

The vulnerability allows a local application to perform service disruption.

The vulnerability exists due to an uncaught exception within Bluetooth. A local application can perform service disruption.

4) Buffer Underwrite ('Buffer Underflow') (CVE-ID: CVE-2025-20695)

The vulnerability allows a local application to perform service disruption.

The vulnerability exists due to an uncaught exception within Bluetooth. A local application can perform service disruption.

Remediation

Install update from vendor's website.

References

• https://support.lenovo.com/us/en/product_security/LEN-197066