SB2026011320 - Multiple vulnerabilities in Lenovo Mediatek tablets

Description

This security bulletin contains information about 4 secuirty vulnerabilities.

1) Out-of-bounds read (CVE-ID: CVE-2025-20703)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition within the Modem component. A remote attacker with control over a rogue base station can send specially crafted packets to trigger an out-of-bounds read error and perform a denial of service (DoS) attack.

2) Out-of-bounds write (CVE-ID: CVE-2025-20704)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input within the Modem component. A remote attacker with control over a rogue base station can trigger an out-of-bounds write and execute arbitrary code on the target system.

3) Use-after-free (CVE-ID: CVE-2025-20705)

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. 

4) Use-after-free (CVE-ID: CVE-2025-20707)

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

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

Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References

• https://support.lenovo.com/us/en/product_security/LEN-200965