CVE-2026-34001

highpriority · track · 0EPSS 0.003 · 18 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.26% (18th) EPSS

CVSS 7.8 · high

Is it mine?

84 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.8highAV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · secalert@redhat.com USexploitability 1.8 · impact 5.9

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondaryexploitability 1.8 · impact 5.9

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-416USCWE-825US

affected products (84)

Products and version ranges known to be affected.

Amazon Linux 2all versionscert_bundDEcpe:/o:amazon:linux_2:-
Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Fedora Linuxall versionscert_bundDEcpe:/o:fedoraproject:fedora:-
Gentoo Linuxall versionscert_bundDEcpe:/o:gentoo:linux:-
IBM Power Hardware Management Consoleall versionscert_bundDEcpe:/a:ibm:hardware_management_console:-
IGEL OS <11.11.150all versionscert_bundDE
IGEL OS <12.8.1all versionscert_bundDE
Open Source X.Org X11 <21.1.22all versionscert_bundDE
Open Source Xwayland <24.1.10all versionscert_bundDE
OpenBSD OpenBSD 7.8all versionscert_bundDEcpe:/a:openbsd:openbsd:7.8
OpenBSD OpenBSD <7.7all versionscert_bundDE
OpenBSD OpenBSD <7.8all versionscert_bundDE
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
RESF Rocky Linuxall versionscert_bundDEcpe:/o:resf:rocky_linux:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
Red Hat Enterprise Linux 9.2all versionscert_bundDEcpe:/o:redhat:enterprise_linux:9.2
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
IGEL OS< 11.11.150cert_bundDE
IGEL OS< 12.8.1cert_bundDE

showing 20 of 84

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-1119X.Org X11, Xwayland: Mehrere SchwachstellenDeutsch2026-04-14csaf · cert_bundDE
Ein lokaler Angreifer kann mehrere Schwachstellen in X.Org X11 und Xwayland ausnutzen, um nicht näher spezifizierte Angriffe durchzuführen, darunter möglicherweise Speicherbeschädigungen, die Offenlegung von Informationen oder einen Denial-of-Service-Zustand.
WID-SEC-W-2026-2455Oracle Solaris Drittanbieterkomponenten: Mehrere SchwachstellenDeutsch2026-07-21csaf · cert_bundDE
Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in verschiedenen Komponenten von Drittanbietern in Oracle Solaris ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund NVD CVE.org MITRE

published 2026-04-23modified 2026-10-26

references (77)

External citations — patches, advisories, analysis.

scry

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