# CVE-2026-7762: Morse Micro HaLowLink 2 heap overflow in dot11ah.ko driver

Source: https://junglewise.ai/threats/cve-2026-7762-morse-micro-halowlink-2-heap-overflow-in-dot11ah-ko-driver  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-05. Updated: 2026-06-05  
License: CC BY 4.0 with a link back

CVE-2026-7762 · Severity: info · CVSS 8.8 · Published 2026-06-05

A security vulnerability exists in the Wi-Fi driver for Morse Micro HaLowLink 2 devices, which are used for long-range Wi-Fi connectivity. An attacker within radio range can send a specially crafted Wi-Fi signal to crash the device or potentially take full control of the system. This attack does not require the attacker to have a password or for a user to interact with the device, posing a significant risk to device availability and data integrity.

Technologies: [Morse Micro HaLowLink 2](https://junglewise.ai/threats/technologies/halowlink-2). Vendors: [Morse Micro](https://junglewise.ai/threats/vendors/morse-micro).

## Quick answers

**Is CVE-2026-7762 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-7762 being exploited in the wild.

**How severe is CVE-2026-7762?** Informational severity, with a CVSS score of 8.8, published 5 June 2026.

**Which products and versions are affected?** Morse Micro HaLowLink 2 prior to 2.11.13.

**Is there a fix for CVE-2026-7762?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-7762 attacked?** It is attacked from the adjacent network, in device firmware.

**Am I affected by CVE-2026-7762?** Check whether you run Morse Micro HaLowLink 2 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A heap-based buffer overflow exists in the dot11ah.ko HaLow Wi-Fi kernel driver within the morse_dot11ah_find_s1g_caps_for_bssid() function. The vulnerability is caused by the driver using the Information Element (IE) length field from a received frame directly as the size argument for a memcpy operation without validating it against the 15-byte destination buffer. An unauthenticated attacker within radio range can transmit a crafted 802.11ah beacon or probe response frame containing a malformed S1G Capabilities IE (ID 0xD9) to overflow the heap with up to 240 bytes of controlled data. This can lead to a Denial of Service (kernel panic) or Remote Code Execution (RCE). The issue is fixed in version 2.11.13.

## Affected products

- Morse Micro HaLowLink 2 prior to 2.11.13

## Timeline

- 2026-06-05: disclosed: NVD publication date
- 2026-06-05: advisory: Morse Micro advisory MM-SA-2026-002 published

## References

- [https://www.morsemicro.com/security-advisories/MM-SA-2026-002](https://www.morsemicro.com/security-advisories/MM-SA-2026-002)

## Related threats

- [Morse Micro HaLowLink 2 heap overflow in morse.ko kernel driver](https://junglewise.ai/threats/cve-2026-7763-morse-micro-halowlink-2-heap-overflow-in-morse-ko-kernel-driver)
- [Morse Micro HaLowLink 2 out-of-bounds read in morse.ko driver](https://junglewise.ai/threats/cve-2026-7764-morse-micro-halowlink-2-out-of-bounds-read-in-morse-ko-driver)