Out-of-bounds write in MediaTek products - CVE-2025-20795

Vulnerability identifier: #VU120881

CSH Severity: Low

CVSS v4: 8.5 [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]

CVE-ID: CVE-2025-20795

CWE-ID: CWE-787

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local application to execute arbitrary code.

The vulnerability exists due to a missing bounds check within KeyInstall. A local application can execute arbitrary code.

MT8755
MT6989
MT6991
MT8186
MT8188
MT8195
MT8196
MT8370
MT8390
MT8391
MT8395
MT8676
MT8678
MT8696
MT6985
MT8766
MT8768
MT8781
MT8786
MT8788E
MT8791T
MT8792
MT8793
MT8796
MT8873
MT8883
MT8893
MT6580
MT6739
MT6761
MT6765
MT6768
MT6789
MT6833
MT6835
MT6855
MT2718
MT6878
MT6879
MT6886
MT6895
MT6897
MT6899
MT6983
MT6873
MT6779
MT6781
MT6785
MT6853
MT6877
MT6883
MT6885
MT6889
MT6893
TB373FU Lenovo Idea Tab Pro
TB311FU/TB311XU Lenovo Tab with Clear Case/ Lenovo Tab with Folio Case
TB351FU Lenovo Tab Plus
TB350FU, TB350XU Lenovo Tab P11 Gen
TB350FU, TB350XU Lenovo Tab P11 2nd
TB305FUXU Lenovo Tab One/Lenovo Tab K9
TB330FUP, TB330XUP Lenovo Tab K11 Edition
TB330FUP, TB330XUP Lenovo Tab K11 Enhanced
TB570FU, TB570ZU Lenovo Tab Extreme
TB330FU/TB330XU Lenovo Tab B11/Lenovo Tab M11&K11
TB336FU/TB336ZU Lenovo Idea Tab/ Lenovo Tab K11 Gen 2
Lenovo Idea Tab Pro (TB373FU)
Lenovo Tab with Clear Case/ Lenovo Tab with Folio Case (TB311FU/TB311XU)
Lenovo Tab Plus (TB351FU)
Lenovo Tab P11 2nd Gen (TB350XU / TB350FU)
Lenovo Tab One/Lenovo Tab K9 (TB305FUXU)
Lenovo Tab K9 (TB305FU/TB305XU)
Lenovo Tab K11 (TB330FU/TB330FUP/TB330XU/TB330XUP)
Lenovo Tab Extreme (TB570ZU/TB570FU)
Lenovo Tab M11 (TB330FU/TB330XU)
Lenovo Idea Tab/ Lenovo Tab K11 Gen 2 (TB336FU/TB336ZU)
Google Android

Install security update from vendor's website.

Google Android - addressed in versions 14 2026-03-05, 15 2026-03-05, 16-qpr2 2026-03-05, 16 2026-03-05

• https://corp.mediatek.com/product-security-bulletin/January-2026

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