CVE-2026-34001
Xorg: xwayland: x.org x server: use-after-free vulnerability leads to server crash and potential memory corruption
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.
No summary for this CVE yet.
CVSS Vector Breakdown
Exploitability
AV:LAttack VectorLocal
AC:LAttack ComplexityLow
PR:LPrivileges RequiredLow
UI:NUser InteractionNone
Scope
S:UScopeUnchanged
Impact
C:HConfidentialityHigh
I:HIntegrityHigh
A:HAvailabilityHigh
Weaknesses
Affected Products
Red Hat Inc.
commercial·USaka Red Hat
АО «ИВК»
commercial·RUaka ivk
X.Org Foundation
oss-project·USaka xlib, xorg-server, libx11
Сообщество свободного программного обеспечения
oss-projectaka fsf
and 12 more affected products View all →
Exploitability
Official Patch Available
Workaround Available
References
https://access.redhat.com/errata/RHSA-2026:10739
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:11352
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:11369
access.redhat.com
and 40 more references View all →
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