CVE-2026-7763 PUBLISHED

Heap buffer overflow in morse.ko TIM IE processing

Assigner: Bugcrowd
Reserved: 04.05.2026 Published: 05.06.2026 Updated: 05.06.2026

A 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 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 frame containing a malformed Traffic Indication Map (TIM) Information Element. 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, allowing up to 252 bytes of attacker-controlled data to be written beyond the buffer boundary. Because beacons are broadcast frames processed during passive scanning, no authentication, association, or user interaction is required.

Product Status

Vendor Morse Micro
Product HaLowLink 2
Versions Default: unaffected
  • affected from 0 to 2.11.13 (excl.)

References

Problem Types

  • CWE-122 Heap-based Buffer Overflow