# 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.

- **Severity:** Medium 6.8 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 4 Jun 2026
- **Updated:** 4 Jun 2026
- **Also known as:** GHSA-7c7h-p74x-w3h5

## 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 (Out-of-bounds Read)

## Which versions are affected by CVE-2026-7764?

It affects 1 product.


Products: 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.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-7764 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-7764 in the wild and no public exploit code.

Affected product: Morse Micro HaLowLink 2. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-7764/ (Markdown: https://insights.sbomify.com/CVE-2026-7764/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-7764
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-7764
- OSV: https://osv.dev/vulnerability/CVE-2026-7764

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-7764/
Summaries are generated and may contain mistakes; the official description above is the record.