Morse Micro HaLowLink 2 up to 2.11.12 morse.ko morse_page_slicing_process_tim_element heap-based overflow

Summaryinfo

A vulnerability was found in Morse Micro HaLowLink 2 up to 2.11.12 and classified as critical. The impacted element is the function morse_page_slicing_process_tim_element in the library morse.ko. Executing a manipulation can lead to heap-based overflow. This vulnerability appears as CVE-2026-7763. The attack may be performed from remote. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Morse Micro HaLowLink 2 up to 2.11.12. This vulnerability affects the function morse_page_slicing_process_tim_element in the library morse.ko. The manipulation with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at morsemicro.com. This vulnerability was named CVE-2026-7763 since 05/04/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

Upgrading to version 2.11.13 eliminates this vulnerability.

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Productinfo

Vendor

• Morse Micro

Name

• HaLowLink 2

Version

• 2.11.0
• 2.11.1
• 2.11.2
• 2.11.3
• 2.11.4
• 2.11.5
• 2.11.6
• 2.11.7
• 2.11.8
• 2.11.9
• 2.11.10
• 2.11.11
• 2.11.12

CPE 2.3info

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CPE 2.2info

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