What is GHSA-7543-m55x-c77x?

GHSA-7543-m55x-c77x is a security advisory published by GitHub Security Advisories with High severity. Time-of-check time-of-use (toctou) race condition in Reliable Multicast Transport Driver (RMCAST)...

Which CVE IDs does GHSA-7543-m55x-c77x cover?

GHSA-7543-m55x-c77x covers the following CVE IDs: CVE-2026-85943. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-7543-m55x-c77x?

GHSA-7543-m55x-c77x has a CVSS v3 base score of 7.0, published by GitHub Security Advisories.

GHSA-7543-m55x-c77xHighCVSS 7.0

Time-of-check time-of-use (toctou) race condition in Reliable Multicast Transport Driver (RMCAST)...

Vendor

GitHub Security Advisories

Published

October 13, 2026

Last Modified

October 13, 2026

🔗 CVE IDs covered (1)

CVE-2026-85943 →

📋 Description

Time-of-check time-of-use (toctou) race condition in Reliable Multicast Transport Driver (RMCAST) allows an authorized attacker to elevate privileges locally.

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-85943
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85943
https://github.com/advisories/GHSA-7543-m55x-c77x