Out-of-Bounds Write Vulnerability in MediaTek Modem
CVE-2025-20634

9.8CRITICAL

Key Information:

Vendor
MediaTek
Status
Mt2737, Mt6813, Mt6835, Mt6835t, Mt6878, Mt6878m, Mt6879, Mt6886, Mt6895, Mt6895tt, Mt6896, Mt6897, Mt6899, Mt6980, Mt6980d, Mt6983, Mt6983t, Mt6985, Mt6985t, Mt6989, Mt6989t, Mt6990, Mt6991, Mt8673, Mt8676, Mt8678, Mt8795t, Mt8798, Mt8863
Vendor
CVE Published:
3 February 2025

Summary

A vulnerability in MediaTek's modem allows for an out-of-bounds write due to a missing bounds check. This issue can be exploited when a user equipment (UE) connects to a malicious base station controlled by an attacker, enabling unauthorized remote code execution without requiring any user interaction. To mitigate the risk, it is essential to update to the latest version as specified in patch ID MOLY01289384.

Affected Version(s)

MT2737, MT6813, MT6835, MT6835T, MT6878, MT6878M, MT6879, MT6886, MT6895, MT6895TT, MT6896, MT6897, MT6899, MT6980, MT6980D, MT6983, MT6983T, MT6985, MT6985T, MT6989, MT6989T, MT6990, MT6991, MT8673, MT8676, MT8678, MT8795T, MT8798, MT8863 Modem NR16, NR17, NR17R

References

https://corp.mediatek.com/product-security-bulletin/Febru...

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.