WID-SEC-W-2026-0918
Vulnerability from csaf_certbund - Published: 2026-03-30 22:00 - Updated: 2026-05-27 22:00Summary
GNU libc: Schwachstelle ermöglicht Denial of Service
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: Die GNU libc ist die Basis C Bibliothek unter Linux sowie anderen Unix-Betriebssystemen, welche die Systemaufrufe sowie Basisfunktionalität bereitstellt.
Angriff: Ein entfernter, anonymer Angreifer kann eine Schwachstelle in GNU libc ausnutzen, um einen Denial of Service Angriff durchzuführen.
Betroffene Betriebssysteme: - UNIX
Affected products
Known affected
10 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Red Hat Enterprise Linux 8
Red Hat / Enterprise Linux
|
cpe:/o:redhat:enterprise_linux:8
|
8 | |
|
SUSE Linux
SUSE
|
cpe:/o:suse:suse_linux:-
|
— | |
|
Red Hat Enterprise Linux
Red Hat / Enterprise Linux
|
cpe:/o:redhat:enterprise_linux:-
|
— | |
|
SUSE openSUSE
SUSE
|
cpe:/o:suse:opensuse:-
|
— | |
|
Amazon Linux 2
Amazon
|
cpe:/o:amazon:linux_2:-
|
— | |
|
Open Source GNU libc <=2.43
Open Source / GNU libc
|
<=2.43 | ||
|
Oracle Linux
Oracle
|
cpe:/o:oracle:linux:-
|
— | |
|
Google Container-Optimized OS
Google
|
cpe:/o:google:container-optimized_os:-
|
— | |
|
Red Hat Enterprise Linux 10
Red Hat / Enterprise Linux
|
cpe:/o:redhat:enterprise_linux:10
|
10 | |
|
Fedora Linux
Fedora
|
cpe:/o:fedoraproject:fedora:-
|
— |
References
28 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": "Die GNU libc ist die Basis C Bibliothek unter Linux sowie anderen Unix-Betriebssystemen, welche die Systemaufrufe sowie Basisfunktionalit\u00e4t bereitstellt.",
"title": "Produktbeschreibung"
},
{
"category": "summary",
"text": "Ein entfernter, anonymer Angreifer kann eine Schwachstelle in GNU libc ausnutzen, um einen Denial of Service Angriff durchzuf\u00fchren.",
"title": "Angriff"
},
{
"category": "general",
"text": "- 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-2026-0918 - CSAF Version",
"url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0918.json"
},
{
"category": "self",
"summary": "WID-SEC-2026-0918 - Portal Version",
"url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0918"
},
{
"category": "external",
"summary": "OSS Security Mailing List vom 2026-03-30",
"url": "https://seclists.org/oss-sec/2026/q1/413"
},
{
"category": "external",
"summary": "GNU libc Advisory vom 2026-03-30",
"url": "https://sourceware.org/git/?p=glibc.git%3Ba%3Dblob_plain%3Bf%3Dadvisories%2FGLIBC-SA-2026-0007"
},
{
"category": "external",
"summary": "Red Hat Bugzilla vom 2026-03-30",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2453117"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:1498-1 vom 2026-04-21",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-April/025481.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:1501-1 vom 2026-04-21",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-April/025478.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:21317-1 vom 2026-04-27",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-April/025675.html"
},
{
"category": "external",
"summary": "Amazon Linux Security Advisory ALAS2-2026-3272 vom 2026-04-30",
"url": "https://alas.aws.amazon.com/AL2/ALAS2-2026-3272.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:21395-1 vom 2026-04-30",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-April/025770.html"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:12740 vom 2026-05-01",
"url": "https://access.redhat.com/errata/RHSA-2026:12740"
},
{
"category": "external",
"summary": "Container-Optimized OS release notes vom 2026-05-02",
"url": "https://docs.cloud.google.com/container-optimized-os/docs/release-notes#May_01_2026"
},
{
"category": "external",
"summary": "Fedora Security Advisory FEDORA-2026-4B7780802C vom 2026-05-01",
"url": "https://bodhi.fedoraproject.org/updates/FEDORA-2026-4b7780802c"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:1662-1 vom 2026-04-30",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-April/025788.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:21424-1 vom 2026-05-04",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-May/025826.html"
},
{
"category": "external",
"summary": "openSUSE Security Update OPENSUSE-SU-2026:10722-1 vom 2026-05-10",
"url": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/MEGJDZKKSFVHAH6XSFA6XKWHALNNRDYP/"
},
{
"category": "external",
"summary": "openSUSE Security Update OPENSUSE-SU-2026:20764-1 vom 2026-05-19",
"url": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/KXZJBCTUEFVIXIGM4B4CGZUUH4CCN6SO/"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:21682-1 vom 2026-05-19",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-May/026155.html"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:21688-1 vom 2026-05-21",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-May/026237.html"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:20587 vom 2026-05-26",
"url": "https://access.redhat.com/errata/RHSA-2026:20587"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:20594 vom 2026-05-26",
"url": "https://access.redhat.com/errata/RHSA-2026:20594"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:21780-1 vom 2026-05-26",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-May/026283.html"
},
{
"category": "external",
"summary": "Container-Optimized OS release notes vom 2026-05-26",
"url": "https://docs.cloud.google.com/container-optimized-os/docs/release-notes#May_21_2026"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:21751-1 vom 2026-05-26",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-May/026307.html"
},
{
"category": "external",
"summary": "Container-Optimized OS release notes vom 2026-05-26",
"url": "https://docs.cloud.google.com/container-optimized-os/docs/release-notes#May_01_2026"
},
{
"category": "external",
"summary": "Red Hat Security Advisory RHSA-2026:20597 vom 2026-05-26",
"url": "https://access.redhat.com/errata/RHSA-2026:20597"
},
{
"category": "external",
"summary": "SUSE Security Update SUSE-SU-2026:21807-1 vom 2026-05-27",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-May/026338.html"
},
{
"category": "external",
"summary": "Oracle Linux Security Advisory ELSA-2026-20587 vom 2026-05-27",
"url": "https://linux.oracle.com/errata/ELSA-2026-20587.html"
}
],
"source_lang": "en-US",
"title": "GNU libc: Schwachstelle erm\u00f6glicht Denial of Service",
"tracking": {
"current_release_date": "2026-05-27T22:00:00.000+00:00",
"generator": {
"date": "2026-05-28T07:27:03.813+00:00",
"engine": {
"name": "BSI-WID",
"version": "1.6.0"
}
},
"id": "WID-SEC-W-2026-0918",
"initial_release_date": "2026-03-30T22:00:00.000+00:00",
"revision_history": [
{
"date": "2026-03-30T22:00:00.000+00:00",
"number": "1",
"summary": "Initiale Fassung"
},
{
"date": "2026-04-20T22:00:00.000+00:00",
"number": "2",
"summary": "Neue Updates von SUSE aufgenommen"
},
{
"date": "2026-04-26T22:00:00.000+00:00",
"number": "3",
"summary": "Neue Updates von SUSE aufgenommen"
},
{
"date": "2026-04-29T22:00:00.000+00:00",
"number": "4",
"summary": "Neue Updates von Amazon aufgenommen"
},
{
"date": "2026-05-03T22:00:00.000+00:00",
"number": "5",
"summary": "Neue Updates von SUSE, Red Hat und Fedora aufgenommen"
},
{
"date": "2026-05-10T22:00:00.000+00:00",
"number": "6",
"summary": "Neue Updates von openSUSE aufgenommen"
},
{
"date": "2026-05-18T22:00:00.000+00:00",
"number": "7",
"summary": "Neue Updates von openSUSE aufgenommen"
},
{
"date": "2026-05-19T22:00:00.000+00:00",
"number": "8",
"summary": "Neue Updates von SUSE aufgenommen"
},
{
"date": "2026-05-21T22:00:00.000+00:00",
"number": "9",
"summary": "Neue Updates von SUSE aufgenommen"
},
{
"date": "2026-05-25T22:00:00.000+00:00",
"number": "10",
"summary": "Neue Updates von Red Hat aufgenommen"
},
{
"date": "2026-05-26T22:00:00.000+00:00",
"number": "11",
"summary": "Neue Updates von SUSE und Red Hat aufgenommen"
},
{
"date": "2026-05-27T22:00:00.000+00:00",
"number": "12",
"summary": "Neue Updates von SUSE und Oracle Linux aufgenommen"
}
],
"status": "final",
"version": "12"
}
},
"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": "Fedora Linux",
"product": {
"name": "Fedora Linux",
"product_id": "74185",
"product_identification_helper": {
"cpe": "cpe:/o:fedoraproject:fedora:-"
}
}
}
],
"category": "vendor",
"name": "Fedora"
},
{
"branches": [
{
"category": "product_name",
"name": "Google Container-Optimized OS",
"product": {
"name": "Google Container-Optimized OS",
"product_id": "1607324",
"product_identification_helper": {
"cpe": "cpe:/o:google:container-optimized_os:-"
}
}
}
],
"category": "vendor",
"name": "Google"
},
{
"branches": [
{
"branches": [
{
"category": "product_version_range",
"name": "\u003c=2.43",
"product": {
"name": "Open Source GNU libc \u003c=2.43",
"product_id": "T052269"
}
},
{
"category": "product_version_range",
"name": "\u003c=2.43",
"product": {
"name": "Open Source GNU libc \u003c=2.43",
"product_id": "T052269-fixed"
}
}
],
"category": "product_name",
"name": "GNU libc"
}
],
"category": "vendor",
"name": "Open Source"
},
{
"branches": [
{
"category": "product_name",
"name": "Oracle Linux",
"product": {
"name": "Oracle Linux",
"product_id": "T004914",
"product_identification_helper": {
"cpe": "cpe:/o:oracle:linux:-"
}
}
}
],
"category": "vendor",
"name": "Oracle"
},
{
"branches": [
{
"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": "product_version",
"name": "8",
"product": {
"name": "Red Hat Enterprise Linux 8",
"product_id": "T054695",
"product_identification_helper": {
"cpe": "cpe:/o:redhat:enterprise_linux:8"
}
}
},
{
"category": "product_version",
"name": "10",
"product": {
"name": "Red Hat Enterprise Linux 10",
"product_id": "T054698",
"product_identification_helper": {
"cpe": "cpe:/o:redhat:enterprise_linux:10"
}
}
}
],
"category": "product_name",
"name": "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": "T027843",
"product_identification_helper": {
"cpe": "cpe:/o:suse:opensuse:-"
}
}
}
],
"category": "vendor",
"name": "SUSE"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2026-4046",
"product_status": {
"known_affected": [
"T054695",
"T002207",
"67646",
"T027843",
"398363",
"T052269",
"T004914",
"1607324",
"T054698",
"74185"
]
},
"release_date": "2026-03-30T22:00:00.000+00:00",
"title": "CVE-2026-4046"
}
]
}
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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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