9.0
Critical
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…
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| xorg-x11-server 21.1 | earliest → < 21.1.24 | 21.1.24 |
| xwayland 24.1 | earliest → < 24.1.13 | 24.1.13 |
Other CVEs of xorg-x11-server
The 12 CVEs of xorg-x11-server →
CVE-2026-93536
X.Org Server GestureBuildSprite Use-After-Free
5.3
Medium
CVE-2026-93524
X.Org Server XKB SetMap Key Width/Action Count Desync Out-Of-Bounds Read
6.9
Medium
CVE-2026-93523
X.Org Server XInput2 PassiveUngrabDevice Out-of-Bounds Write
7.8
High
CVE-2026-93522
X.Org Server Glamor CopyArea Heap Buffer Overflow
7.8
High