WID-SEC-W-2026-2129
Vulnerability from csaf_certbund - Published: 2026-06-29 22:00 - Updated: 2026-11-11 23:00Summary
libxml2: Schwachstelle ermöglicht Denial of Service
Severity
Niedrig
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: libxml ist ein C Parser und Toolkit, welches für das Gnome Projekt entwickelt wurde.
Angriff: Ein entfernter, anonymer Angreifer kann eine Schwachstelle in libxml2 ausnutzen, um einen Denial of Service Angriff durchzuführen.
Betroffene Betriebssysteme: - Linux
- UNIX
- Windows
Affected products
Known affected
10 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Oracle Linux
Oracle
|
cpe:/o:oracle:linux:-
|
— | |
|
IBM Security Verify Access
IBM
|
cpe:/a:ibm:security_verify_access:-
|
— | |
|
Dell Secure Connect Gateway <5.36.00.16
Dell / Secure Connect Gateway
|
<5.36.00.16 | ||
|
RESF Rocky Linux
RESF
|
cpe:/o:resf:rocky_linux:-
|
— | |
|
Red Hat Enterprise Linux
Red Hat
|
cpe:/o:redhat:enterprise_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:-
|
— | |
|
IBM MQ Operator
IBM / MQ
|
cpe:/a:ibm:mq:operator
|
Operator | |
|
Open Source libxml2
Open Source
|
cpe:/a:xmlsoft:libxml2:-
|
— |
References
47 references
{
"document": {
"aggregate_severity": {
"text": "niedrig"
},
"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": "libxml ist ein C Parser und Toolkit, welches f\u00fcr das Gnome Projekt entwickelt wurde.",
"title": "Produktbeschreibung"
},
{
"category": "summary",
"text": "Ein entfernter, anonymer Angreifer kann eine Schwachstelle in libxml2 ausnutzen, um einen Denial of Service Angriff durchzuf\u00fchren.",
"title": "Angriff"
},
{
"category": "general",
"text": "- Linux\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-2026-2129 - CSAF Version",
"url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2129.json"
},
{
"category": "self",
"summary": "WID-SEC-2026-2129 - Portal Version",
"url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2129"
},
{
"category": "external",
"summary": "GitHub Security Advisory GHSA-h67q-h62w-5mjr vom 2026-06-29",
"url": "https://github.com/advisories/GHSA-h67q-h62w-5mjr"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:33840 vom 2026-07-01",
"url": "https://access.redhat.com/errata/RHSA-2026:33840"
},
{
"category": "external",
"summary": "openSUSE Security Update OPENSUSE-SU-2026:11258-1 vom 2026-07-14",
"url": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/ZWJ6JIPH33FSDSBTGTTXHQQKFJEXIKRU/"
},
{
"category": "external",
"summary": "openSUSE Security Update OPENSUSE-SU-2026:21317-1 vom 2026-07-15",
"url": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/F4X3JY36LCCUOX7TQTXQJK4SID2SZI3T/"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:22596-1 vom 2026-07-15",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-July/027498.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:22636-1 vom 2026-07-16",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-July/027570.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:3111-1 vom 2026-07-17",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-July/027616.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:3096-1 vom 2026-07-17",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-July/027606.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:3095-1 vom 2026-07-17",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-July/027607.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:3097-1 vom 2026-07-17",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-July/027605.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:22894-1 vom 2026-07-27",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-July/027867.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:22806-1 vom 2026-07-27",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-July/027825.html"
},
{
"category": "external",
"summary": "Amazon Linux Security Advisory ALAS2-2026-3827 vom 2026-08-05",
"url": "https://alas.aws.amazon.com/AL2/ALAS2-2026-3827.html"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:60394 vom 2026-08-27",
"url": "https://access.redhat.com/errata/RHSA-2026:60394"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:61248 vom 2026-08-31",
"url": "https://access.redhat.com/errata/RHSA-2026:61248"
},
{
"category": "external",
"summary": "Rocky Linux Security Advisory RLSA-2026:60394 vom 2026-08-28",
"url": "https://errata.build.resf.org/RLSA-2026:60394"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:61247 vom 2026-08-31",
"url": "https://access.redhat.com/errata/RHSA-2026:61247"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:61783 vom 2026-09-01",
"url": "https://access.redhat.com/errata/RHSA-2026:61783"
},
{
"category": "external",
"summary": "Rocky Linux Security Advisory RLSA-2026:61247 vom 2026-08-31",
"url": "https://errata.build.resf.org/RLSA-2026:61247"
},
{
"category": "external",
"summary": "Dell Security Advisory DSA-2026-386 vom 2026-09-01",
"url": "https://www.dell.com/support/kbdoc/000503504/dsa-2026-386-security-update-f"
},
{
"category": "external",
"summary": "Oracle Linux Security Advisory ELSA-2026-60394 vom 2026-08-31",
"url": "https://linux.oracle.com/errata/ELSA-2026-60394-0.html"
},
{
"category": "external",
"summary": "Rocky Linux Security Advisory RLSA-2026:61248 vom 2026-08-31",
"url": "https://errata.build.resf.org/RLSA-2026:61248"
},
{
"category": "external",
"summary": "Oracle Linux Security Advisory ELSA-2026-61247 vom 2026-09-02",
"url": "https://linux.oracle.com/errata/ELSA-2026-61247-0.html"
},
{
"category": "external",
"summary": "Oracle Linux Security Advisory ELSA-2026-61248 vom 2026-09-03",
"url": "https://linux.oracle.com/errata/ELSA-2026-61248-0.html"
},
{
"category": "external",
"summary": "IBM Security Bulletin 7289064 vom 2026-09-23",
"url": "https://www.ibm.com/support/pages/node/7289064"
},
{
"category": "external",
"summary": "IBM Security Bulletin 7290794 vom 2026-10-03",
"url": "https://www.ibm.com/support/pages/node/7290794"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:82888 vom 2026-10-14",
"url": "https://access.redhat.com/errata/RHSA-2026:82888"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:89759 vom 2026-10-26",
"url": "https://access.redhat.com/errata/RHSA-2026:89759"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:89750 vom 2026-10-26",
"url": "https://access.redhat.com/errata/RHSA-2026:89750"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:90309 vom 2026-10-26",
"url": "https://access.redhat.com/errata/RHSA-2026:90309"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:91207 vom 2026-10-27",
"url": "https://access.redhat.com/errata/RHSA-2026:91207"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:91224 vom 2026-10-27",
"url": "https://access.redhat.com/errata/RHSA-2026:91224"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:91204 vom 2026-10-27",
"url": "https://access.redhat.com/errata/RHSA-2026:91204"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:91202 vom 2026-10-27",
"url": "https://access.redhat.com/errata/RHSA-2026:91202"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:91219 vom 2026-10-27",
"url": "https://access.redhat.com/errata/RHSA-2026:91219"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:91206 vom 2026-10-27",
"url": "https://access.redhat.com/errata/RHSA-2026:91206"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:91218 vom 2026-10-27",
"url": "https://access.redhat.com/errata/RHSA-2026:91218"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:91217 vom 2026-10-27",
"url": "https://access.redhat.com/errata/RHSA-2026:91217"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:92352 vom 2026-10-29",
"url": "https://access.redhat.com/errata/RHSA-2026:92352"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:92589 vom 2026-10-30",
"url": "https://access.redhat.com/errata/RHSA-2026:92589"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:93463 vom 2026-11-02",
"url": "https://access.redhat.com/errata/RHSA-2026:93463"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:94474 vom 2026-11-03",
"url": "https://access.redhat.com/errata/RHSA-2026:94474"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:94476 vom 2026-11-03",
"url": "https://access.redhat.com/errata/RHSA-2026:94476"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:98468 vom 2026-11-11",
"url": "https://access.redhat.com/errata/RHSA-2026:98468"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:98572 vom 2026-11-11",
"url": "https://access.redhat.com/errata/RHSA-2026:98572"
}
],
"source_lang": "en-US",
"title": "libxml2: Schwachstelle erm\u00f6glicht Denial of Service",
"tracking": {
"current_release_date": "2026-11-11T23:00:00.000+00:00",
"generator": {
"date": "2026-11-12T10:10:14.413+00:00",
"engine": {
"name": "BSI-WID",
"version": "1.7.0"
}
},
"id": "WID-SEC-W-2026-2129",
"initial_release_date": "2026-06-29T22:00:00.000+00:00",
"revision_history": [
{
"date": "2026-06-29T22:00:00.000+00:00",
"number": "1",
"summary": "Initiale Fassung"
},
{
"date": "2026-06-30T22:00:00.000+00:00",
"number": "2",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2026-07-14T22:00:00.000+00:00",
"number": "3",
"summary": "Neue Updates von openSUSE aufgenommen"
},
{
"date": "2026-07-15T22:00:00.000+00:00",
"number": "4",
"summary": "Neue Updates von SUSE aufgenommen"
},
{
"date": "2026-07-16T22:00:00.000+00:00",
"number": "5",
"summary": "Neue Updates von SUSE aufgenommen"
},
{
"date": "2026-07-19T22:00:00.000+00:00",
"number": "6",
"summary": "Neue Updates von SUSE aufgenommen"
},
{
"date": "2026-07-27T22:00:00.000+00:00",
"number": "7",
"summary": "Neue Updates von SUSE aufgenommen"
},
{
"date": "2026-08-04T22:00:00.000+00:00",
"number": "8",
"summary": "Neue Updates von Amazon aufgenommen"
},
{
"date": "2026-08-26T22:00:00.000+00:00",
"number": "9",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2026-08-30T22:00:00.000+00:00",
"number": "10",
"summary": "Neue Updates von Red Hat und Rocky Enterprise Software Foundation aufgenommen"
},
{
"date": "2026-08-31T22:00:00.000+00:00",
"number": "11",
"summary": "Neue Updates von Red Hat, Rocky Enterprise Software Foundation, Dell und Oracle Linux aufgenommen"
},
{
"date": "2026-09-01T22:00:00.000+00:00",
"number": "12",
"summary": "Neue Updates von Oracle Linux aufgenommen"
},
{
"date": "2026-09-03T22:00:00.000+00:00",
"number": "13",
"summary": "Neue Updates von Oracle Linux aufgenommen"
},
{
"date": "2026-09-22T22:00:00.000+00:00",
"number": "14",
"summary": "Neue Updates von IBM aufgenommen"
},
{
"date": "2026-10-04T22:00:00.000+00:00",
"number": "15",
"summary": "Neue Updates von IBM aufgenommen"
},
{
"date": "2026-10-14T22:00:00.000+00:00",
"number": "16",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2026-10-25T23:00:00.000+00:00",
"number": "17",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2026-10-26T23:00:00.000+00:00",
"number": "18",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2026-10-27T23:00:00.000+00:00",
"number": "19",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2026-10-28T23:00:00.000+00:00",
"number": "20",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2026-10-29T23:00:00.000+00:00",
"number": "21",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2026-11-01T23:00:00.000+00:00",
"number": "22",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2026-11-02T23:00:00.000+00:00",
"number": "23",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2026-11-11T23:00:00.000+00:00",
"number": "24",
"summary": "Neue Updates von Red Hat aufgenommen"
}
],
"status": "final",
"version": "24"
}
},
"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": "\u003c5.36.00.16",
"product": {
"name": "Dell Secure Connect Gateway \u003c5.36.00.16",
"product_id": "T058878"
}
},
{
"category": "product_version",
"name": "5.36.00.16",
"product": {
"name": "Dell Secure Connect Gateway 5.36.00.16",
"product_id": "T058878-fixed",
"product_identification_helper": {
"cpe": "cpe:/a:dell:secure_connect_gateway:5.36.00.16"
}
}
}
],
"category": "product_name",
"name": "Secure Connect Gateway"
}
],
"category": "vendor",
"name": "Dell"
},
{
"branches": [
{
"branches": [
{
"category": "product_version",
"name": "Operator",
"product": {
"name": "IBM MQ Operator",
"product_id": "T036688",
"product_identification_helper": {
"cpe": "cpe:/a:ibm:mq:operator"
}
}
}
],
"category": "product_name",
"name": "MQ"
},
{
"category": "product_name",
"name": "IBM Security Verify Access",
"product": {
"name": "IBM Security Verify Access",
"product_id": "T059008",
"product_identification_helper": {
"cpe": "cpe:/a:ibm:security_verify_access:-"
}
}
}
],
"category": "vendor",
"name": "IBM"
},
{
"branches": [
{
"category": "product_name",
"name": "Open Source libxml2",
"product": {
"name": "Open Source libxml2",
"product_id": "T055920",
"product_identification_helper": {
"cpe": "cpe:/a:xmlsoft:libxml2:-"
}
}
}
],
"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": "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-2026-11979",
"product_status": {
"known_affected": [
"T056236",
"T059008",
"T058878",
"T054581",
"67646",
"T055946",
"398363",
"T054646",
"T036688",
"T055920"
]
},
"release_date": "2026-06-29T22:00:00.000+00:00",
"title": "CVE-2026-11979"
}
]
}
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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
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- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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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.