WID-SEC-W-2026-2954
Vulnerability from csaf_certbund - Published: 2026-08-20 22:00 - Updated: 2026-09-28 22:00Summary
libvirt: Schwachstelle ermöglicht Privilegieneskalation 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: Libvirt ist eine Bibliothek, die Schnittstellen zu den Virtualisierungsfunktionen von Linux anbietet und Werkzeuge zur Verwaltung von virtualisierten Systemen zur Verfügung stellt.
Angriff: Ein lokaler Angreifer kann eine Schwachstelle in libvirt ausnutzen, um einen Denial-of-Service-Zustand zu verursachen oder Berechtigungen zu erweitern.
Betroffene Betriebssysteme: - Sonstiges
- UNIX
- Windows
Affected products
Known affected
6 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Red Hat Enterprise Linux
Red Hat
|
cpe:/o:redhat:enterprise_linux:-
|
— | |
|
Ubuntu Linux
Ubuntu
|
cpe:/o:canonical:ubuntu_linux:-
|
— | |
|
SUSE openSUSE
SUSE
|
cpe:/o:suse:opensuse:-
|
— | |
|
Amazon Linux 2
Amazon
|
cpe:/o:amazon:linux_2:-
|
— | |
|
SUSE Linux
SUSE
|
cpe:/o:suse:suse_linux:-
|
— | |
|
Open Source libvirt
Open Source
|
cpe:/a:redhat:libvirt:-
|
— |
References
23 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": "Libvirt ist eine Bibliothek, die Schnittstellen zu den Virtualisierungsfunktionen von Linux anbietet und Werkzeuge zur Verwaltung von virtualisierten Systemen zur Verf\u00fcgung stellt.",
"title": "Produktbeschreibung"
},
{
"category": "summary",
"text": "Ein lokaler Angreifer kann eine Schwachstelle in libvirt ausnutzen, um einen Denial-of-Service-Zustand zu verursachen oder Berechtigungen zu erweitern.",
"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-2026-2954 - CSAF Version",
"url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2954.json"
},
{
"category": "self",
"summary": "WID-SEC-2026-2954 - Portal Version",
"url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2954"
},
{
"category": "external",
"summary": "libvirt GitLab Commit vom 2026-08-20",
"url": "https://gitlab.com/libvirt/libvirt/-/commit/5a62cbf2907d4590283597b46da9c0f41e7b4d4f"
},
{
"category": "external",
"summary": "libvirt GitLab Work Item vom 2026-08-20",
"url": "https://gitlab.com/libvirt/libvirt/-/work_items/903"
},
{
"category": "external",
"summary": "GitHub Security Advisory GHSA-6JQ9-9F7W-H7MC vom 2026-08-20",
"url": "https://github.com/advisories/GHSA-6JQ9-9F7W-H7MC"
},
{
"category": "external",
"summary": "openSUSE Security Update OPENSUSE-SU-2026:21738-1 vom 2026-09-08",
"url": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/ZXDH6E4GYDIGJDUOHUE6SM7QUFFNPXCN/"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:3939-1 vom 2026-09-10",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-September/028794.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:23445-1 vom 2026-09-12",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-September/028817.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:4009-1 vom 2026-09-12",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-September/028881.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:23460-1 vom 2026-09-13",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-September/028978.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:4010-1 vom 2026-09-12",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-September/028880.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:4004-1 vom 2026-09-12",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-September/028886.html"
},
{
"category": "external",
"summary": "Amazon Linux Security Advisory ALAS2-2026-3910 vom 2026-09-14",
"url": "https://alas.aws.amazon.com/AL2/ALAS2-2026-3910.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:23515-1 vom 2026-09-15",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-September/029035.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:23603-1 vom 2026-09-16",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-September/029087.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:4141-1 vom 2026-09-16",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-September/029054.html"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:68514 vom 2026-09-17",
"url": "https://access.redhat.com/errata/RHSA-2026:68514"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:68513 vom 2026-09-17",
"url": "https://access.redhat.com/errata/RHSA-2026:68513"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:68594 vom 2026-09-17",
"url": "https://access.redhat.com/errata/RHSA-2026:68594"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:69114 vom 2026-09-21",
"url": "https://access.redhat.com/errata/RHSA-2026:69114"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:69131 vom 2026-09-21",
"url": "https://access.redhat.com/errata/RHSA-2026:69131"
},
{
"category": "external",
"summary": "Ubuntu Security Notice USN-8833-1 vom 2026-09-28",
"url": "https://ubuntu.com/security/notices/USN-8833-1"
},
{
"category": "external",
"summary": "Ubuntu Security Notice USN-8831-1 vom 2026-09-28",
"url": "https://ubuntu.com/security/notices/USN-8831-1"
}
],
"source_lang": "en-US",
"title": "libvirt: Schwachstelle erm\u00f6glicht Privilegieneskalation und DoS",
"tracking": {
"current_release_date": "2026-09-28T22:00:00.000+00:00",
"generator": {
"date": "2026-09-29T08:49:30.726+00:00",
"engine": {
"name": "BSI-WID",
"version": "1.6.0"
}
},
"id": "WID-SEC-W-2026-2954",
"initial_release_date": "2026-08-20T22:00:00.000+00:00",
"revision_history": [
{
"date": "2026-08-20T22:00:00.000+00:00",
"number": "1",
"summary": "Initiale Fassung"
},
{
"date": "2026-09-07T22:00:00.000+00:00",
"number": "2",
"summary": "Referenz(en) aufgenommen: LSN-2026-0002"
},
{
"date": "2026-09-08T22:00:00.000+00:00",
"number": "3",
"summary": "Neue Updates von openSUSE aufgenommen"
},
{
"date": "2026-09-09T22:00:00.000+00:00",
"number": "4",
"summary": "Neue Updates von SUSE aufgenommen"
},
{
"date": "2026-09-13T22:00:00.000+00:00",
"number": "5",
"summary": "Neue Updates von SUSE aufgenommen"
},
{
"date": "2026-09-14T22:00:00.000+00:00",
"number": "6",
"summary": "Neue Updates von Amazon aufgenommen"
},
{
"date": "2026-09-15T22:00:00.000+00:00",
"number": "7",
"summary": "Neue Updates von SUSE aufgenommen"
},
{
"date": "2026-09-16T22:00:00.000+00:00",
"number": "8",
"summary": "Neue Updates von SUSE und Red Hat aufgenommen"
},
{
"date": "2026-09-20T22:00:00.000+00:00",
"number": "9",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2026-09-28T22:00:00.000+00:00",
"number": "10",
"summary": "Neue Updates von Ubuntu aufgenommen"
}
],
"status": "final",
"version": "10"
}
},
"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": [
{
"category": "product_name",
"name": "Open Source libvirt",
"product": {
"name": "Open Source libvirt",
"product_id": "T058446",
"product_identification_helper": {
"cpe": "cpe:/a:redhat:libvirt:-"
}
}
}
],
"category": "vendor",
"name": "Open Source"
},
{
"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": "product_name",
"name": "SUSE openSUSE",
"product": {
"name": "SUSE openSUSE",
"product_id": "T055946",
"product_identification_helper": {
"cpe": "cpe:/o:suse:opensuse:-"
}
}
}
],
"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-2026-18917",
"product_status": {
"known_affected": [
"67646",
"T055947",
"T055946",
"398363",
"T054646",
"T058446"
]
},
"release_date": "2026-08-20T22:00:00.000+00:00",
"title": "CVE-2026-18917"
}
]
}
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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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