Out-of-bounds write in MediaTek products - CVE-2025-20764

Vulnerability identifier: #VU118893

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-2025-20764

CWE-ID: CWE-787

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local application to perform service disruption.

The vulnerability exists due to a missing bounds check within smi. A local application can perform service disruption.

MT8196
MT6895
MT6897
MT6899
MT6983
MT6985
MT6989
MT6991
MT8676
MT8678
MT8792
MT8793
MT8796
MT8873
MT8893
MT6739
MT6886
MT6879
MT6878
MT6855
MT6835
MT6833
MT6789
MT6768
MT6765
MT6761
MT6893
MT6889
MT6885
MT6883
MT6877
MT6853
MT6781
TB373FU Lenovo Idea Tab Pro
TB336FU/TB336ZU Lenovo Idea Tab/ Lenovo Tab K11 Gen 2
TB570FU, TB570ZU Lenovo Tab Extreme
TB350FU, TB350XU Lenovo Tab P11 2nd
TB350FU, TB350XU Lenovo Tab P11 Gen
TB351FU Lenovo Tab Plus
TB311FU/TB311XU Lenovo Tab with Clear Case/ Lenovo Tab with Folio Case
Lenovo Idea Tab Pro (TB373FU)
Lenovo Idea Tab/ Lenovo Tab K11 Gen 2 (TB336FU/TB336ZU)
Lenovo Tab Extreme (TB570ZU/TB570FU)
Lenovo Tab P11 2nd Gen (TB350XU / TB350FU)
Lenovo Tab Plus (TB351FU)
Lenovo Tab with Clear Case/ Lenovo Tab with Folio Case (TB311FU/TB311XU)

Install security update from vendor's website.

• https://corp.mediatek.com/product-security-bulletin/December-2025

• Multiple vulnerabilities in MediaTek chipsets
• Multiple vulnerabilities in Lenovo Mediatek tablets