CVE-2025-20731: mediatek, inc. mt6890, mt7615, mt7622, mt7663, mt7915, mt7916, mt7981, mt7986 Heap-based Buffer Overflow

Vulnerability summary

CVE-2025-20731 is a medium (CVSS 5.3) Heap-based Buffer Overflow vulnerability in mediatek, inc. mt6890, mt7615, mt7622, mt7663, mt7915, mt7916, mt7981, mt7986. EPSS estimates a 0.12% chance of exploitation in the next 30 days, higher than 1.9% of scored vulnerabilities.

Timeline

1. 04-11-2025
   PublishedVulnerability first disclosed.
2. 26-02-2026
   Last modifiedVulnerability information updated.

Description

In wlan AP driver, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege (when OceReducedNeighborReport is disabled). User interaction is not needed for exploitation. Patch ID: WCNCR00441511; Issue ID: MSV-4140.

• CWE-122Heap-based Buffer OverflowA heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.