What is CVE-2026-20492?

CVE-2026-20492 is a medium-severity vulnerability in Mediatek Mt2735 Firmware, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 5.5/10. Published 2026-08-03.

How severe is CVE-2026-20492?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Mediatek Mt2735 Firmware

CVE-2026-20492

In Audio HAL, there is a possible system becoming unresponsive due to a race condition. This could lead to local denial of service with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS10960026 (Note: For MT6880, MT6890, MT6990, MT6988) / AUTO00851250 (Note: For MT2735, MT2737); Issue ID: MSV-7583.

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

EPSS: 0.001 (0.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Mediatek Mt2735_firmware
Mediatek Mt2737_firmware
Mediatek Mt6880_firmware
Mediatek Mt6890_firmware
Mediatek Mt6988_firmware
Mediatek Mt6990_firmware
Mediatek, Inc. Mediatek Chipset — versions MT2735, MT2737, MT6880

Weakness classification (CWE)

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

References

security@mediatek.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-20492?: CVE-2026-20492 is a medium-severity vulnerability in Mediatek Mt2735 Firmware, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 5.5/10. Published 2026-08-03.
How severe is CVE-2026-20492?: Medium severity. CVSS v3 base score is 5.5 out of 10.