Time-of-check Time-of-use (TOCTOU) Race Condition in MediaTek products - CVE-2026-20438
Published: March 3, 2026
Vulnerability identifier: #VU123456
CSH Severity: Low
CVSS v4: 4.8 [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]
CVE-ID: CVE-2026-20438
CWE-ID: CWE-367
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local application to perform service disruption.
The vulnerability exists due to a race condition . A local application can perform service disruption.
Affected software
MT2718
MT6899
MT6991
MT8168
MT8169
MT8186
MT8188
MT8678
MT8695
MT8696
MT8793
MT6899
MT6991
MT8168
MT8169
MT8186
MT8188
MT8678
MT8695
MT8696
MT8793
How to mitigate CVE-2026-20438
Install security update from vendor's website.