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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-34001 Detail

Description

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://access.redhat.com/errata/RHSA-2026:10739 Red Hat, Inc.
https://access.redhat.com/errata/RHSA-2026:11352 Red Hat, Inc.
https://access.redhat.com/errata/RHSA-2026:11369 Red Hat, Inc.
https://access.redhat.com/errata/RHSA-2026:11388 Red Hat, Inc.
https://access.redhat.com/errata/RHSA-2026:11656 Red Hat, Inc.
https://access.redhat.com/errata/RHSA-2026:11692 Red Hat, Inc.
https://access.redhat.com/errata/RHSA-2026:13414 Red Hat, Inc.
https://access.redhat.com/errata/RHSA-2026:19125 Red Hat, Inc.
https://access.redhat.com/errata/RHSA-2026:19342 Red Hat, Inc.
https://access.redhat.com/errata/RHSA-2026:19343 Red Hat, Inc.
https://access.redhat.com/errata/RHSA-2026:19344 Red Hat, Inc.
https://access.redhat.com/errata/RHSA-2026:20547 Red Hat, Inc.
https://access.redhat.com/errata/RHSA-2026:20555 Red Hat, Inc.
https://access.redhat.com/errata/RHSA-2026:20557 Red Hat, Inc.
https://access.redhat.com/errata/RHSA-2026:20558 Red Hat, Inc.
https://access.redhat.com/errata/RHSA-2026:20560 Red Hat, Inc.
https://access.redhat.com/errata/RHSA-2026:20561 Red Hat, Inc.
https://access.redhat.com/errata/RHSA-2026:20562 Red Hat, Inc.
https://access.redhat.com/errata/RHSA-2026:20563 Red Hat, Inc.
https://access.redhat.com/errata/RHSA-2026:20575 Red Hat, Inc.
https://access.redhat.com/errata/RHSA-2026:20576 Red Hat, Inc.
https://access.redhat.com/errata/RHSA-2026:20590 Red Hat, Inc.
https://access.redhat.com/security/cve/CVE-2026-34001 Red Hat, Inc.
https://bugzilla.redhat.com/show_bug.cgi?id=2451109 Red Hat, Inc.

Weakness Enumeration

CWE-ID CWE Name Source
CWE-825 Expired Pointer Dereference Red Hat, Inc.  

Change History

15 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-34001
NVD Published Date:
04/23/2026
NVD Last Modified:
05/26/2026
Source:
Red Hat, Inc.