SB2025072842 - Lenovo update for MediaTek Bluetooth driver
Published: July 28, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 vulnerabilities.
1) Heap-based Buffer Overflow (CVE-ID: CVE-2025-20680)
CWE-ID: CWE-122 - Heap-based Buffer Overflow
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
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)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
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)
CWE-ID: CWE-124 - Buffer Underwrite ('Buffer Underflow')
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
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)
CWE-ID: CWE-124 - Buffer Underwrite ('Buffer Underflow')
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
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.