PatchSiren cyber security CVE debrief

CVE-2026-7763 Morse Micro CVE debrief

CVE-2026-7763 is a critical heap-based buffer overflow vulnerability in the morse.ko HaLow Wi-Fi kernel driver in Morse Micro HaLowLink 2 software versions prior to 2.11.13. An unauthenticated attacker within radio range can cause a Denial of Service (kernel panic) or potentially achieve Remote Code Execution via a crafted 802.11ah beacon frame containing a malformed Traffic Indication Map (TIM) Information Element. The vulnerability exists because the function morse_page_slicing_process_tim_element() in page_slicing.c derives the TIM bitmap length directly from a received IE field without validating it against the fixed-size destination buffer before passing it to memset and memcpy operations. This allows up to 252 bytes of attacker-controlled data to be written beyond the buffer boundary. Beacons are broadcast frames processed during passive scanning, requiring no authentication, association, or user interaction.