WID-SEC-W-2026-2378
Vulnerability from csaf_certbund - Published: 2026-07-15 22:00 - Updated: 2026-08-05 22:00Summary
X.Org X11 Server (libXfont2): Mehrere Schwachstellen ermöglichen Ausführen von beliebigem Programmcode mit Administratorrechten
Severity
Mittel
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.
Angriff: Ein lokaler Angreifer kann mehrere Schwachstellen in X.Org X11 ausnutzen, um erweiterte Berechtigungen zu erlangen und beliebigen Code mit Root-Rechten auszuführen.
Betroffene Betriebssysteme: - Sonstiges
- UNIX
- Windows
Affected products
Known affected
7 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Oracle Linux
Oracle
|
cpe:/o:oracle:linux:-
|
— | |
|
RESF Rocky Linux
RESF
|
cpe:/o:resf:rocky_linux:-
|
— | |
|
Red Hat Enterprise Linux
Red Hat
|
cpe:/o:redhat:enterprise_linux:-
|
— | |
|
Ubuntu Linux
Ubuntu
|
cpe:/o:canonical:ubuntu_linux:-
|
— | |
|
Open Source X.Org X11 Server libXfont2 <2.0.8
Open Source / X.Org X11
|
Server libXfont2 <2.0.8 | ||
|
Amazon Linux 2
Amazon
|
cpe:/o:amazon:linux_2:-
|
— | |
|
SUSE Linux
SUSE
|
cpe:/o:suse:suse_linux:-
|
— |
Affected products
Known affected
7 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Oracle Linux
Oracle
|
cpe:/o:oracle:linux:-
|
— | |
|
RESF Rocky Linux
RESF
|
cpe:/o:resf:rocky_linux:-
|
— | |
|
Red Hat Enterprise Linux
Red Hat
|
cpe:/o:redhat:enterprise_linux:-
|
— | |
|
Ubuntu Linux
Ubuntu
|
cpe:/o:canonical:ubuntu_linux:-
|
— | |
|
Open Source X.Org X11 Server libXfont2 <2.0.8
Open Source / X.Org X11
|
Server libXfont2 <2.0.8 | ||
|
Amazon Linux 2
Amazon
|
cpe:/o:amazon:linux_2:-
|
— | |
|
SUSE Linux
SUSE
|
cpe:/o:suse:suse_linux:-
|
— |
Affected products
Known affected
7 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Oracle Linux
Oracle
|
cpe:/o:oracle:linux:-
|
— | |
|
RESF Rocky Linux
RESF
|
cpe:/o:resf:rocky_linux:-
|
— | |
|
Red Hat Enterprise Linux
Red Hat
|
cpe:/o:redhat:enterprise_linux:-
|
— | |
|
Ubuntu Linux
Ubuntu
|
cpe:/o:canonical:ubuntu_linux:-
|
— | |
|
Open Source X.Org X11 Server libXfont2 <2.0.8
Open Source / X.Org X11
|
Server libXfont2 <2.0.8 | ||
|
Amazon Linux 2
Amazon
|
cpe:/o:amazon:linux_2:-
|
— | |
|
SUSE Linux
SUSE
|
cpe:/o:suse:suse_linux:-
|
— |
References
26 references
{
"document": {
"aggregate_severity": {
"text": "mittel"
},
"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.",
"title": "Produktbeschreibung"
},
{
"category": "summary",
"text": "Ein lokaler Angreifer kann mehrere Schwachstellen in X.Org X11 ausnutzen, um erweiterte Berechtigungen zu erlangen und beliebigen Code mit Root-Rechten auszuf\u00fchren.",
"title": "Angriff"
},
{
"category": "general",
"text": "- Sonstiges\n- UNIX\n- Windows",
"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-2026-2378 - CSAF Version",
"url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2378.json"
},
{
"category": "self",
"summary": "WID-SEC-2026-2378 - Portal Version",
"url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2378"
},
{
"category": "external",
"summary": "ZDI Advisory vom 2026-07-15",
"url": "https://www.zerodayinitiative.com/advisories/ZDI-26-406/"
},
{
"category": "external",
"summary": "ZDI Advisory vom 2026-07-15",
"url": "https://www.zerodayinitiative.com/advisories/ZDI-26-407/"
},
{
"category": "external",
"summary": "ZDI Advisory vom 2026-07-15",
"url": "https://www.zerodayinitiative.com/advisories/ZDI-26-408/"
},
{
"category": "external",
"summary": "X.Org Update vom 2026-07-15",
"url": "https://gitlab.freedesktop.org/xorg/lib/libxfont/-/commit/be0b08e2d354138d3222b4490e2a77c6ee42f778"
},
{
"category": "external",
"summary": "X.Org Update vom 2026-07-15",
"url": "https://gitlab.freedesktop.org/xorg/lib/libxfont/-/commit/b4389e0b1d84a690b819bb27b1439968811a3674"
},
{
"category": "external",
"summary": "X.Org Update vom 2026-07-15",
"url": "https://gitlab.freedesktop.org/xorg/lib/libxfont/-/commit/dff957a5158da038a282a59a31fe736702732939"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:22614-1 vom 2026-07-16",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-July/027585.html"
},
{
"category": "external",
"summary": "Ubuntu Security Notice USN-8560-1 vom 2026-07-20",
"url": "https://ubuntu.com/security/notices/USN-8560-1"
},
{
"category": "external",
"summary": "Amazon Linux Security Advisory ALAS2-2026-3815 vom 2026-07-21",
"url": "https://alas.aws.amazon.com/AL2/ALAS2-2026-3815.html"
},
{
"category": "external",
"summary": "Amazon Linux Security Advisory ALAS2-2026-3814 vom 2026-07-21",
"url": "https://alas.aws.amazon.com/AL2/ALAS2-2026-3814.html"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:47103 vom 2026-07-29",
"url": "https://access.redhat.com/errata/RHSA-2026:47103"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:47079 vom 2026-07-28",
"url": "https://access.redhat.com/errata/RHSA-2026:47079"
},
{
"category": "external",
"summary": "Rocky Linux Security Advisory RLSA-2026:47103 vom 2026-07-29",
"url": "https://errata.build.resf.org/RLSA-2026:47103"
},
{
"category": "external",
"summary": "Oracle Linux Security Advisory ELSA-2026-47079 vom 2026-07-29",
"url": "https://linux.oracle.com/errata/ELSA-2026-47079.html"
},
{
"category": "external",
"summary": "Oracle Linux Security Advisory ELSA-2026-47103 vom 2026-07-29",
"url": "https://linux.oracle.com/errata/ELSA-2026-47103.html"
},
{
"category": "external",
"summary": "Oracle Linux Security Advisory ELSA-2026-47084 vom 2026-07-29",
"url": "https://linux.oracle.com/errata/ELSA-2026-47084.html"
},
{
"category": "external",
"summary": "Rocky Linux Security Advisory RLSA-2026:47079 vom 2026-07-29",
"url": "https://errata.build.resf.org/RLSA-2026:47079"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:47084 vom 2026-08-03",
"url": "https://access.redhat.com/errata/RHSA-2026:47084"
},
{
"category": "external",
"summary": "Rocky Linux Security Advisory RLSA-2026:47084 vom 2026-08-03",
"url": "https://errata.build.resf.org/RLSA-2026:47084"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:51062 vom 2026-08-06",
"url": "https://access.redhat.com/errata/RHSA-2026:51062"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:51059 vom 2026-08-06",
"url": "https://access.redhat.com/errata/RHSA-2026:51059"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:51058 vom 2026-08-06",
"url": "https://access.redhat.com/errata/RHSA-2026:51058"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:51061 vom 2026-08-06",
"url": "https://access.redhat.com/errata/RHSA-2026:51061"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:51060 vom 2026-08-06",
"url": "https://access.redhat.com/errata/RHSA-2026:51060"
}
],
"source_lang": "en-US",
"title": "X.Org X11 Server (libXfont2): Mehrere Schwachstellen erm\u00f6glichen Ausf\u00fchren von beliebigem Programmcode mit Administratorrechten",
"tracking": {
"current_release_date": "2026-08-05T22:00:00.000+00:00",
"generator": {
"date": "2026-08-06T11:56:14.868+00:00",
"engine": {
"name": "BSI-WID",
"version": "1.6.0"
}
},
"id": "WID-SEC-W-2026-2378",
"initial_release_date": "2026-07-15T22:00:00.000+00:00",
"revision_history": [
{
"date": "2026-07-15T22:00:00.000+00:00",
"number": "1",
"summary": "Initiale Fassung"
},
{
"date": "2026-07-16T22:00:00.000+00:00",
"number": "2",
"summary": "Neue Updates von SUSE aufgenommen"
},
{
"date": "2026-07-20T22:00:00.000+00:00",
"number": "3",
"summary": "Neue Updates von Ubuntu aufgenommen"
},
{
"date": "2026-07-21T22:00:00.000+00:00",
"number": "4",
"summary": "Neue Updates von Amazon aufgenommen"
},
{
"date": "2026-07-28T22:00:00.000+00:00",
"number": "5",
"summary": "Neue Updates von Red Hat und Rocky Enterprise Software Foundation aufgenommen"
},
{
"date": "2026-07-29T22:00:00.000+00:00",
"number": "6",
"summary": "Neue Updates von Oracle Linux und Rocky Enterprise Software Foundation aufgenommen"
},
{
"date": "2026-08-02T22:00:00.000+00:00",
"number": "7",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2026-08-03T22:00:00.000+00:00",
"number": "8",
"summary": "Neue Updates von Rocky Enterprise Software Foundation aufgenommen"
},
{
"date": "2026-08-05T22:00:00.000+00:00",
"number": "9",
"summary": "Neue Updates von Red Hat aufgenommen"
}
],
"status": "final",
"version": "9"
}
},
"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": "Server libXfont2 \u003c2.0.8",
"product": {
"name": "Open Source X.Org X11 Server libXfont2 \u003c2.0.8",
"product_id": "T056705"
}
},
{
"category": "product_version",
"name": "Server libXfont2 2.0.8",
"product": {
"name": "Open Source X.Org X11 Server libXfont2 2.0.8",
"product_id": "T056705-fixed",
"product_identification_helper": {
"cpe": "cpe:/a:x:x.org_x11:server_libxfont2__2.0.8"
}
}
}
],
"category": "product_name",
"name": "X.Org X11"
}
],
"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": "T054646",
"product_identification_helper": {
"cpe": "cpe:/o:suse:suse_linux:-"
}
}
}
],
"category": "vendor",
"name": "SUSE"
},
{
"branches": [
{
"category": "product_name",
"name": "Ubuntu Linux",
"product": {
"name": "Ubuntu Linux",
"product_id": "T055947",
"product_identification_helper": {
"cpe": "cpe:/o:canonical:ubuntu_linux:-"
}
}
}
],
"category": "vendor",
"name": "Ubuntu"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2026-56001",
"product_status": {
"known_affected": [
"T056236",
"T054581",
"67646",
"T055947",
"T056705",
"398363",
"T054646"
]
},
"release_date": "2026-07-15T22:00:00.000+00:00",
"title": "CVE-2026-56001"
},
{
"cve": "CVE-2026-56002",
"product_status": {
"known_affected": [
"T056236",
"T054581",
"67646",
"T055947",
"T056705",
"398363",
"T054646"
]
},
"release_date": "2026-07-15T22:00:00.000+00:00",
"title": "CVE-2026-56002"
},
{
"cve": "CVE-2026-56003",
"product_status": {
"known_affected": [
"T056236",
"T054581",
"67646",
"T055947",
"T056705",
"398363",
"T054646"
]
},
"release_date": "2026-07-15T22:00:00.000+00:00",
"title": "CVE-2026-56003"
}
]
}
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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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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