Out-of-bounds Read Affecting xorg-server package, versions [0,]
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-XORGSERVER-16424105
- published6 May 2026
- disclosed5 May 2026
- creditUnknown
Introduced: 5 May 2026
CVE-2026-34000 (opens in a new tab)How to fix?
There is no fixed version for xorg-server.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Read via the CheckSetGeom and XkbAddGeomKeyAlias functions in the geometry processing component. An attacker can access sensitive memory contents or cause the server to crash by sending specially crafted requests to the X11 server.
Workaround
This vulnerability can be mitigated by restricting access to the X11 server. On systems where a graphical environment is not required, consider disabling the X server entirely by setting the default system target to multi-user mode. For systems requiring the X server, ensure that X11 forwarding is disabled in SSH configurations if not explicitly needed, and restrict direct X11 connections to trusted users and networks through firewall rules. If changes are made to SSH configuration, the sshd service must be restarted. If the default system target is changed, a system reboot is required.