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CVE-2026-34001
HIGH7.8
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.
CVE Details
CVSS v3.1 Score7.8
SeverityHIGH
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack VectorLOCAL
ComplexityLOW
Privileges RequiredLOW
User InteractionNONE
Published4/23/2026
Last Modified4/29/2026
Sourcenvd
Honeypot Sightings0
Weaknesses (CWE)
CWE-825
References
https://access.redhat.com/errata/RHSA-2026:10739(secalert@redhat.com)
https://access.redhat.com/errata/RHSA-2026:11352(secalert@redhat.com)
https://access.redhat.com/errata/RHSA-2026:11369(secalert@redhat.com)
https://access.redhat.com/errata/RHSA-2026:11388(secalert@redhat.com)
https://access.redhat.com/errata/RHSA-2026:11656(secalert@redhat.com)
https://access.redhat.com/errata/RHSA-2026:11692(secalert@redhat.com)
https://access.redhat.com/security/cve/CVE-2026-34001(secalert@redhat.com)
https://bugzilla.redhat.com/show_bug.cgi?id=2451109(secalert@redhat.com)
IOC Correlations
No correlations recorded
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