CVE-2026-7762
CriticalCVSS 9.8Exploitation Probability (EPSS)
Low risk44th percentile - higher than 44% of all known CVEs
Summary
The HaLow Wi-Fi kernel driver (dot11ah.ko) in Morse Micro HaLowLink 2 software before version 2.11.13 contains a heap-based buffer overflow that can be exploited by an unauthenticated attacker within radio range to cause a kernel panic or remote code execution via a crafted beacon or probe response frame.
Risk Assessment
An attacker within Wi-Fi range can cause system crash (DoS) or take control of the device without authentication.
Recommendation
Update Morse Micro HaLowLink 2 software to version 2.11.13 or later.
Original NVD description (English source)
A heap-based buffer overflow vulnerability in the dot11ah.ko HaLow Wi-Fi kernel driver in Morse Micro HaLowLink 2 software versions prior to 2.11.13 allows an unauthenticated attacker within radio range to cause a Denial of Service (kernel panic) or potentially achieve Remote Code Execution via a crafted 802.11ah beacon or probe response frame containing a malformed S1G Capabilities Information Element (IE element ID 0xD9). The function morse_dot11ah_find_s1g_caps_for_bssid() uses the IE length field directly as the size argument to memcpy without validating it against the 15-byte destination buffer. An attacker can supply up to 255 bytes, causing an overflow of up to 240 bytes of attacker-controlled data into adjacent kernel heap memory. The vulnerability is triggerable during normal scanning without authentication, association, or user interaction.