---
id: 6155
title: "CVE-2026-54995 — Microsoft Windows Reliable Multicast Transport Driver Integer Underflow"
cve: CVE-2026-54995
source_domain: aretiq.ai
source_url: "https://aretiq.ai/research/vul260702-cve-2026-54995-microsoft-windows-reliable-multicast-transport-driver-integer-underflow/"
published_at: "2026-07-02T00:00:00Z"
tags: ["rce", "vulnerability-research", "windows-security", "integer-underflow", "windows-kernel", "cve-2026-54995", "rmcast", "multicast"]
phying_url: "https://phying.com/item/6155"
lang: en
---

# CVE-2026-54995 — Microsoft Windows Reliable Multicast Transport Driver Integer Underflow

## Summary

CVE-2026-54995: an integer underflow in Windows' rmcast.sys PGM FEC handling corrupts a parity counter, enabling memory corruption and potential kernel RCE via crafted multicast packets.

## Intelligence Metadata

- **Sources:** aretiq.ai
- **CVE:** CVE-2026-54995
- **Published:** 2026-07-02T00:00:00Z
- **Original:** https://aretiq.ai/research/vul260702-cve-2026-54995-microsoft-windows-reliable-multicast-transport-driver-integer-underflow/
- **Phying News:** https://phying.com/item/6155