SB2025122705 - Lenovo update for MediaTek 2025-11 WLAN

Description

This security bulletin contains information about 2 vulnerabilities.

1) Heap-based Buffer Overflow (CVE-ID: CVE-2025-20728)

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 wlan. A local application can execute arbitrary code.

2) Time-of-check Time-of-use (TOCTOU) Race Condition (CVE-ID: CVE-2025-20740)

CWE-ID: CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition

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 a race condition within wlan. A local application can execute arbitrary code.

Remediation

Install update from vendor's website.

References

• https://support.lenovo.com/us/en/product_security/LEN-205649