WID-SEC-W-2026-2240
Vulnerability from csaf_certbund - Published: 2026-07-07 22:00 - Updated: 2026-07-21 22:00Summary
X.Org X11 und Xwayland: Mehrere Schwachstellen ermöglichen Codeausführung und DoS
Severity
Hoch
Notes
Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.
Produktbeschreibung: Das X Window System dient der Erzeugung grafischer Oberflächen auf Unix Systemen.
Xwayland ist ein X-Server für die Ausführung von X-Clients unter Wayland Display Servern. Wayland ist ein Ersatz für X.11 Display-Server.
Angriff: Ein Angreifer kann mehrere Schwachstellen in X.Org X11 und Xwayland ausnutzen, um einen Denial of Service zu verursachen oder potentiell beliebigen Programmcode auszuführen.
Betroffene Betriebssysteme: - Linux
- UNIX
Affected products
Known affected
8 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Oracle Linux
Oracle
|
cpe:/o:oracle:linux:-
|
— | |
|
Open Source X.Org X11 <21.1.24
Open Source / X.Org X11
|
<21.1.24 | ||
|
SUSE Linux
SUSE
|
cpe:/o:suse:suse_linux:-
|
— | |
|
RESF Rocky Linux
RESF
|
cpe:/o:resf:rocky_linux:-
|
— | |
|
Red Hat Enterprise Linux
Red Hat
|
cpe:/o:redhat:enterprise_linux:-
|
— | |
|
Open Source Xwayland <24.1.13
Open Source / Xwayland
|
<24.1.13 | ||
|
SUSE openSUSE
SUSE
|
cpe:/o:suse:opensuse:-
|
— | |
|
Amazon Linux 2
Amazon
|
cpe:/o:amazon:linux_2:-
|
— |
Affected products
Known affected
8 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Oracle Linux
Oracle
|
cpe:/o:oracle:linux:-
|
— | |
|
Open Source X.Org X11 <21.1.24
Open Source / X.Org X11
|
<21.1.24 | ||
|
SUSE Linux
SUSE
|
cpe:/o:suse:suse_linux:-
|
— | |
|
RESF Rocky Linux
RESF
|
cpe:/o:resf:rocky_linux:-
|
— | |
|
Red Hat Enterprise Linux
Red Hat
|
cpe:/o:redhat:enterprise_linux:-
|
— | |
|
Open Source Xwayland <24.1.13
Open Source / Xwayland
|
<24.1.13 | ||
|
SUSE openSUSE
SUSE
|
cpe:/o:suse:opensuse:-
|
— | |
|
Amazon Linux 2
Amazon
|
cpe:/o:amazon:linux_2:-
|
— |
References
20 references
{
"document": {
"aggregate_severity": {
"text": "hoch"
},
"category": "csaf_base",
"csaf_version": "2.0",
"distribution": {
"tlp": {
"label": "WHITE",
"url": "https://www.first.org/tlp/"
}
},
"lang": "de-DE",
"notes": [
{
"category": "legal_disclaimer",
"text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
},
{
"category": "description",
"text": "Das X Window System dient der Erzeugung grafischer Oberfl\u00e4chen auf Unix Systemen.\r\nXwayland ist ein X-Server f\u00fcr die Ausf\u00fchrung von X-Clients unter Wayland Display Servern. Wayland ist ein Ersatz f\u00fcr X.11 Display-Server.",
"title": "Produktbeschreibung"
},
{
"category": "summary",
"text": "Ein Angreifer kann mehrere Schwachstellen in X.Org X11 und Xwayland ausnutzen, um einen Denial of Service zu verursachen oder potentiell beliebigen Programmcode auszuf\u00fchren.",
"title": "Angriff"
},
{
"category": "general",
"text": "- Linux\n- UNIX",
"title": "Betroffene Betriebssysteme"
}
],
"publisher": {
"category": "other",
"contact_details": "csaf-provider@cert-bund.de",
"name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
"namespace": "https://www.bsi.bund.de"
},
"references": [
{
"category": "self",
"summary": "WID-SEC-W-2026-2240 - CSAF Version",
"url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2240.json"
},
{
"category": "self",
"summary": "WID-SEC-2026-2240 - Portal Version",
"url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2240"
},
{
"category": "external",
"summary": "X.Org Security Advisory vom 2026-07-07",
"url": "https://lists.x.org/archives/xorg-announce/2026-July/003716.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:2789-1 vom 2026-07-08",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-July/027322.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:2792-1 vom 2026-07-08",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-July/027320.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:2791-1 vom 2026-07-08",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-July/027321.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:2787-1 vom 2026-07-08",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-July/027324.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:2788-1 vom 2026-07-08",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-July/027323.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:2786-1 vom 2026-07-08",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-July/027325.html"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:38490 vom 2026-07-13",
"url": "https://access.redhat.com/errata/RHSA-2026:38490"
},
{
"category": "external",
"summary": "openSUSE Security Update OPENSUSE-SU-2026:11244-1 vom 2026-07-12",
"url": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/BJKQ2OACCWLGP2CCRCPXFIP5GAZOIRAM/"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:38488 vom 2026-07-13",
"url": "https://access.redhat.com/errata/RHSA-2026:38488"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:38489 vom 2026-07-13",
"url": "https://access.redhat.com/errata/RHSA-2026:38489"
},
{
"category": "external",
"summary": "openSUSE Security Update OPENSUSE-SU-2026:21283-1 vom 2026-07-13",
"url": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/ZYROH6AYKCUX4TVB3OKYIUYQM2KPDP4D/"
},
{
"category": "external",
"summary": "Oracle Linux Security Advisory ELSA-2026-38488 vom 2026-07-14",
"url": "https://linux.oracle.com/errata/ELSA-2026-38488.html"
},
{
"category": "external",
"summary": "Rocky Linux Security Advisory RLSA-2026:38487 vom 2026-07-14",
"url": "https://errata.build.resf.org/RLSA-2026:38487"
},
{
"category": "external",
"summary": "Rocky Linux Security Advisory RLSA-2026:38488 vom 2026-07-14",
"url": "https://errata.build.resf.org/RLSA-2026:38488"
},
{
"category": "external",
"summary": "Oracle Linux Security Advisory ELSA-2026-38486 vom 2026-07-14",
"url": "https://linux.oracle.com/errata/ELSA-2026-38486.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:22617-1 vom 2026-07-16",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-July/027582.html"
},
{
"category": "external",
"summary": "Amazon Linux Security Advisory ALAS2-2026-3806 vom 2026-07-21",
"url": "https://alas.aws.amazon.com/AL2/ALAS2-2026-3806.html"
}
],
"source_lang": "en-US",
"title": "X.Org X11 und Xwayland: Mehrere Schwachstellen erm\u00f6glichen Codeausf\u00fchrung und DoS",
"tracking": {
"current_release_date": "2026-07-21T22:00:00.000+00:00",
"generator": {
"date": "2026-07-22T09:20:12.237+00:00",
"engine": {
"name": "BSI-WID",
"version": "1.6.0"
}
},
"id": "WID-SEC-W-2026-2240",
"initial_release_date": "2026-07-07T22:00:00.000+00:00",
"revision_history": [
{
"date": "2026-07-07T22:00:00.000+00:00",
"number": "1",
"summary": "Initiale Fassung"
},
{
"date": "2026-07-08T22:00:00.000+00:00",
"number": "2",
"summary": "Neue Updates von SUSE aufgenommen"
},
{
"date": "2026-07-12T22:00:00.000+00:00",
"number": "3",
"summary": "Neue Updates von Red Hat und openSUSE aufgenommen"
},
{
"date": "2026-07-13T22:00:00.000+00:00",
"number": "4",
"summary": "Neue Updates von Oracle Linux und Rocky Enterprise Software Foundation aufgenommen"
},
{
"date": "2026-07-15T22:00:00.000+00:00",
"number": "5",
"summary": "Referenz(en) aufgenommen: ZDI-26-409, ZDI-26-405"
},
{
"date": "2026-07-16T22:00:00.000+00:00",
"number": "6",
"summary": "Neue Updates von SUSE aufgenommen"
},
{
"date": "2026-07-21T22:00:00.000+00:00",
"number": "7",
"summary": "Neue Updates von Amazon aufgenommen"
}
],
"status": "final",
"version": "7"
}
},
"product_tree": {
"branches": [
{
"branches": [
{
"category": "product_name",
"name": "Amazon Linux 2",
"product": {
"name": "Amazon Linux 2",
"product_id": "398363",
"product_identification_helper": {
"cpe": "cpe:/o:amazon:linux_2:-"
}
}
}
],
"category": "vendor",
"name": "Amazon"
},
{
"branches": [
{
"branches": [
{
"category": "product_version_range",
"name": "\u003c21.1.24",
"product": {
"name": "Open Source X.Org X11 \u003c21.1.24",
"product_id": "T056259"
}
},
{
"category": "product_version",
"name": "21.1.24",
"product": {
"name": "Open Source X.Org X11 21.1.24",
"product_id": "T056259-fixed",
"product_identification_helper": {
"cpe": "cpe:/a:x:x.org_x11:21.1.24"
}
}
}
],
"category": "product_name",
"name": "X.Org X11"
},
{
"branches": [
{
"category": "product_version_range",
"name": "\u003c24.1.13",
"product": {
"name": "Open Source Xwayland \u003c24.1.13",
"product_id": "T056260"
}
},
{
"category": "product_version",
"name": "24.1.13",
"product": {
"name": "Open Source Xwayland 24.1.13",
"product_id": "T056260-fixed",
"product_identification_helper": {
"cpe": "cpe:/a:x.org:xwayland:24.1.13"
}
}
}
],
"category": "product_name",
"name": "Xwayland"
}
],
"category": "vendor",
"name": "Open Source"
},
{
"branches": [
{
"category": "product_name",
"name": "Oracle Linux",
"product": {
"name": "Oracle Linux",
"product_id": "T056236",
"product_identification_helper": {
"cpe": "cpe:/o:oracle:linux:-"
}
}
}
],
"category": "vendor",
"name": "Oracle"
},
{
"branches": [
{
"category": "product_name",
"name": "RESF Rocky Linux",
"product": {
"name": "RESF Rocky Linux",
"product_id": "T054581",
"product_identification_helper": {
"cpe": "cpe:/o:resf:rocky_linux:-"
}
}
}
],
"category": "vendor",
"name": "RESF"
},
{
"branches": [
{
"category": "product_name",
"name": "Red Hat Enterprise Linux",
"product": {
"name": "Red Hat Enterprise Linux",
"product_id": "67646",
"product_identification_helper": {
"cpe": "cpe:/o:redhat:enterprise_linux:-"
}
}
}
],
"category": "vendor",
"name": "Red Hat"
},
{
"branches": [
{
"category": "product_name",
"name": "SUSE Linux",
"product": {
"name": "SUSE Linux",
"product_id": "T002207",
"product_identification_helper": {
"cpe": "cpe:/o:suse:suse_linux:-"
}
}
},
{
"category": "product_name",
"name": "SUSE openSUSE",
"product": {
"name": "SUSE openSUSE",
"product_id": "T055946",
"product_identification_helper": {
"cpe": "cpe:/o:suse:opensuse:-"
}
}
}
],
"category": "vendor",
"name": "SUSE"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2026-55999",
"product_status": {
"known_affected": [
"T056236",
"T056259",
"T002207",
"T054581",
"67646",
"T056260",
"T055946",
"398363"
]
},
"release_date": "2026-07-07T22:00:00.000+00:00",
"title": "CVE-2026-55999"
},
{
"cve": "CVE-2026-56000",
"product_status": {
"known_affected": [
"T056236",
"T056259",
"T002207",
"T054581",
"67646",
"T056260",
"T055946",
"398363"
]
},
"release_date": "2026-07-07T22:00:00.000+00:00",
"title": "CVE-2026-56000"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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