What is GHSA-4gcc-rqqq-58jp?

GHSA-4gcc-rqqq-58jp is a security advisory published by GitHub Security Advisories with Critical severity. Local attackers with a X connection able to provide GLX commit to the X server xorg-server before...

Which CVE IDs does GHSA-4gcc-rqqq-58jp cover?

GHSA-4gcc-rqqq-58jp covers the following CVE IDs: CVE-2026-56000. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

GHSA-4gcc-rqqq-58jpCritical

Local attackers with a X connection able to provide GLX commit to the X server xorg-server before...

Vendor

GitHub Security Advisories

Published

July 8, 2026

Last Modified

July 8, 2026

🔗 CVE IDs covered (1)

CVE-2026-56000 →

📋 Description

Local attackers with a X connection able to provide GLX commit to the X server xorg-server before 21.2.24 and xwayland before 24.1.13 could cause a Heap Use After Free, due to CommonMakeCurrent() pointing into potentially reallocated memory.

🔗 References (4)

https://nvd.nist.gov/vuln/detail/CVE-2026-56000
https://gitlab.freedesktop.org/xorg/xserver/-/commit/2779affbdb4354e894f490e56f962527d6125043
https://www.openwall.com/lists/oss-security/2026/07/08/2
https://github.com/advisories/GHSA-4gcc-rqqq-58jp