CVE-2026-7764 Out-of-bounds read in morse.ko Vendor IE processing
An unauthenticated attacker within radio range can disclose kernel heap memory or cause a denial of service via a malformed Wi-Fi frame.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-7764?
CVE-2026-7764 is a medium-severity vulnerability in Morse Micro HaLowLink 2, published on 4 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An out-of-bounds read vulnerability in the morse.ko HaLow Wi-Fi kernel driver in Morse Micro HaLowLink 2 software versions prior to 2.11.12 allows an unauthenticated attacker within radio range to disclose a small amount of kernel heap memory or cause a Denial of Service (kernel oops/panic) via a crafted 802.11ah beacon or probe response frame containing a malformed Vendor Information Element. The function morse_vendor_find_vendor_ie() does not validate the IE length against the expected structure size before its result is passed to morse_vendor_rx_caps_ops_ie() and morse_vendor_fill_sta_vendor_info(), which read at fixed offsets into the IE data. Because the length check only requires the IE to be longer than 3 bytes, an attacker can supply an undersized IE, causing a heap out-of-bounds read of up to 9 bytes. No authentication, association, or user interaction is required.
Weakness: CWE-125
Which versions are affected by CVE-2026-7764?
It affects 1 product.
Products include Morsemicro Halowlink 2 Firmware.
How do I fix CVE-2026-7764?
No fix has been published for CVE-2026-7764 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-7764 being exploited?
There is no known exploitation of CVE-2026-7764 in the wild and no public exploit code.
Sources
Also known as GHSA-7c7h-p74x-w3h5.