Use-after-free in MediaTek products - CVE-2025-20705

Vulnerability identifier: #VU114607

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-2025-20705

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local application to escalate privileges on the system.

The vulnerability exists due to a use-after-free error in monitor_hang. A local application can execute arbitrary code with System privileges. 

MT6991
MT6895
MT6897
MT6899
MT6980D
MT6983
MT6985
MT6989
MT6990
MT6890
MT8169
MT8186
MT8188
MT8676
MT8678
MT8696
MT8775
MT8792
MT8796
MT6855
MT2735
MT6739
MT6761
MT6765
MT6768
MT6789
MT6835
MT2718
MT6878
MT6879
MT6880
MT6886
MT6893
MT6781
MT6853
MT6877
MT6883
MT6885
MT6889
TB373FU Lenovo Idea Tab Pro
TB330FU/TB330XU Lenovo Tab B11/Lenovo Tab M11&K11
TB330FUP, TB330XUP Lenovo Tab K11 Enhanced
TB330FUP, TB330XUP Lenovo Tab K11 Edition
TB310XU, TB310FU Lenovo Tab M9
TB305FUXU Lenovo Tab One/Lenovo Tab K9
TB311FU/TB311XU Lenovo Tab with Clear Case/ Lenovo Tab with Folio Case
Lenovo Idea Tab Pro (TB373FU)
Lenovo Tab M11 (TB330FU/TB330XU)
Lenovo Tab K11 (TB330FU/TB330FUP/TB330XU/TB330XUP)
Lenovo Tab M9 (TB310FU/TB310XU/TB310XC)
Lenovo Tab K9 (TB305FU/TB305XU)
Lenovo Tab with Clear Case/ Lenovo Tab with Folio Case (TB311FU/TB311XU)

Install updates from vendor's website.

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

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