MediaTek Modem OOB Write Leads to Local DoS
CVE-2026-20564 Published on November 2, 2026
In Modem, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local denial of service with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01780439; Issue ID: MSV-8901.
Weakness Type
What is a Memory Corruption Vulnerability?
The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.
CVE-2026-20564 has been classified to as a Memory Corruption vulnerability or weakness.
Affected Versions
MediaTek, Inc. MediaTek chipset:- Version MT2716 is affected.
- Version MT2735 is affected.
- Version MT2737 is affected.
- Version MT6739 is affected.
- Version MT6761 is affected.
- Version MT6762 is affected.
- Version MT6763 is affected.
- Version MT6765 is affected.
- Version MT6767 is affected.
- Version MT6768 is affected.
- Version MT6769 is affected.
- Version MT6771 is affected.
- Version MT6779 is affected.
- Version MT6781 is affected.
- Version MT6783 is affected.
- Version MT6785 is affected.
- Version MT6789 is affected.
- Version MT6813 is affected.
- Version MT6815 is affected.
- Version MT6833 is affected.
- Version MT6835 is affected.
- Version MT6853 is affected.
- Version MT6855 is affected.
- Version MT6858 is affected.
- Version MT6873 is affected.
- Version MT6875 is affected.
- Version MT6877 is affected.
- Version MT6878 is affected.
- Version MT6879 is affected.
- Version MT6880 is affected.
- Version MT6881 is affected.
- Version MT6883 is affected.
- Version MT6885 is affected.
- Version MT6886 is affected.
- Version MT6889 is affected.
- Version MT6890 is affected.
- Version MT6891 is affected.
- Version MT6893 is affected.
- Version MT6895 is affected.
- Version MT6896 is affected.
- Version MT6897 is affected.
- Version MT6899 is affected.
- Version MT6980 is affected.
- Version MT6982 is affected.
- Version MT6983 is affected.
- Version MT6985 is affected.
- Version MT6986 is affected.
- Version MT6988 is affected.
- Version MT6989 is affected.
- Version MT6990 is affected.
- Version MT6991 is affected.
- Version MT6993 is affected.
- Version MT8668 is affected.
- Version MT8676 is affected.
- Version MT8678 is affected.
- Version MT8755 is affected.
- Version MT8765 is affected.
- Version MT8766 is affected.
- Version MT8766R is affected.
- Version MT8768 is affected.
- Version MT8771 is affected.
- Version MT8775 is affected.
- Version MT8781 is affected.
- Version MT8786 is affected.
- Version MT8788E is affected.
- Version MT8791 is affected.
- Version MT8791T is affected.
- Version MT8792 is affected.
- Version MT8793 is affected.
- Version MT8796 is affected.
- Version MT8797 is affected.
- Version MT8798 is affected.
- Version MT8863 is affected.
- Version MT8873 is affected.
- Version MT8875 is affected.
- Version MT8883 is affected.
- Version MT8893 is affected.