CVE-2026-20492: CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition in MediaTek, Inc. MediaTek chipset
CVE-2026-20492 is a medium severity vulnerability in MediaTek chipsets affecting several models including MT2735, MT2737, MT6880, MT6890, MT6988, and MT6990. It involves a time-of-check to time-of-use (TOCTOU) race condition in the Audio HAL component that can cause the system to become unresponsive, resulting in a local denial of service. Exploitation requires user-level privileges but no user interaction. No official patch or remediation level has been confirmed yet.
AI Analysis
Technical Summary
This vulnerability is a TOCTOU race condition (CWE-367) in the Audio HAL of MediaTek chipsets. The race condition can lead to the system becoming unresponsive, causing a denial of service. The issue affects multiple MediaTek chipset models (MT2735, MT2737, MT6880, MT6890, MT6988, MT6990). Exploitation requires local user privileges but does not require user interaction. The CVSS v3.1 base score is 5.5, reflecting medium severity with an attack vector of local access, low complexity, and no confidentiality or integrity impact but high availability impact. Patch IDs are referenced (ALPS10960026 and AUTO00851250) but no explicit patch availability or remediation level is confirmed in the advisory.
Potential Impact
Successful exploitation results in a local denial of service by causing the system to become unresponsive. There is no impact on confidentiality or integrity. The attack requires local user privileges but no user interaction, limiting the attack vector to local access.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. The advisory references patch IDs but does not explicitly confirm patch availability or remediation level. Until a patch is confirmed, monitor vendor communications for updates.
CVE-2026-20492: CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition in MediaTek, Inc. MediaTek chipset
Description
CVE-2026-20492 is a medium severity vulnerability in MediaTek chipsets affecting several models including MT2735, MT2737, MT6880, MT6890, MT6988, and MT6990. It involves a time-of-check to time-of-use (TOCTOU) race condition in the Audio HAL component that can cause the system to become unresponsive, resulting in a local denial of service. Exploitation requires user-level privileges but no user interaction. No official patch or remediation level has been confirmed yet.
CVSS v3.1
Score 5.5medium
Affected software
MediaTek, Inc.
MediaTek chipset
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability is a TOCTOU race condition (CWE-367) in the Audio HAL of MediaTek chipsets. The race condition can lead to the system becoming unresponsive, causing a denial of service. The issue affects multiple MediaTek chipset models (MT2735, MT2737, MT6880, MT6890, MT6988, MT6990). Exploitation requires local user privileges but does not require user interaction. The CVSS v3.1 base score is 5.5, reflecting medium severity with an attack vector of local access, low complexity, and no confidentiality or integrity impact but high availability impact. Patch IDs are referenced (ALPS10960026 and AUTO00851250) but no explicit patch availability or remediation level is confirmed in the advisory.
Potential Impact
Successful exploitation results in a local denial of service by causing the system to become unresponsive. There is no impact on confidentiality or integrity. The attack requires local user privileges but no user interaction, limiting the attack vector to local access.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. The advisory references patch IDs but does not explicitly confirm patch availability or remediation level. Until a patch is confirmed, monitor vendor communications for updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- MediaTek
- Date Reserved
- 2025-11-03T01:30:59.026Z
- State
- PUBLISHED
Threat ID: 6a700184bf32cb7a34d5cad1
Added to database: 08/03/2026, 02:48:36 UTC
Last enriched: 08/10/2026, 14:57:53 UTC
Last updated: 09/13/2026, 22:01:32 UTC
Views: 41
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