This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-56000 →
DEBIAN-CVE-2026-56000
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 He...
Original description
The description as published by the source.
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.
Source: OSV.dev (Open Source Vulnerabilities) OSV
Affected packages
Debian:12
xorg-server
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:13
xorg-server
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:21.1.16-1.3+deb13u4"}]}]
Debian:14
xorg-server
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:21.1.24-1"}]}]
Debian:12
xwayland
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:13
xwayland
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:14
xwayland
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:24.1.13-1"}]}]
References
- advisory security-tracker.debian.org