CVE-2026-34001 — Xorg: xwayland: x.org x server: use-after-free vulnerability leads to server crash and potential memory corruption
A flaw was found in the X.Org X server. This use-after-free vulnerability occurs in the XSYNC fence triggering logic, specifically within the miSyncTriggerFence() function. An a…
Published: 2026-04-23 · CVSS: 7.8 · CVSS 3.1
A flaw was found in the X.Org X server. This use-after-free vulnerability occurs in the XSYNC fence triggering logic, specifically within the miSyncTriggerFence() function. An attacker with access to the X11 server can exploit this without user interaction, leading to a server crash and potentially enabling memory corruption. This could result in a denial of service or further compromise of the system.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7