SUSE-SU-2026:21879-1
Vulnerability from csaf_suse - Published: 2026-06-01 10:08 - Updated: 2026-09-16 19:52Summary
Security update for libsoup
Severity
Important
Notes
Title of the patch: Security update for libsoup
Description of the patch: This update for libsoup fixes the following issue
- CVE-2026-4271: use-after-free in the HTTP/2 server when user signal handlers disconnect connections during callback
execution (bsc#1259767).
Patchnames: SUSE-SLE-Micro-6.1-556
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
8.6 (High)
Affected products
Recommended
4 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: SUSE Linux Micro 6.1:libsoup-3_0-0-3.4.4-slfo.1.1_9.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Micro 6.1:libsoup-3_0-0-3.4.4-slfo.1.1_9.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Micro 6.1:libsoup-3_0-0-3.4.4-slfo.1.1_9.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Micro 6.1:libsoup-3_0-0-3.4.4-slfo.1.1_9.1.x86_64 | — |
Vendor Fix
|
Threats
Impact
important
References
8 references
{
"document": {
"aggregate_severity": {
"namespace": "https://www.suse.com/support/security/rating/",
"text": "important"
},
"category": "csaf_security_advisory",
"csaf_version": "2.0",
"distribution": {
"text": "Copyright 2024 SUSE LLC. All rights reserved.",
"tlp": {
"label": "WHITE",
"url": "https://www.first.org/tlp/"
}
},
"lang": "en",
"notes": [
{
"category": "summary",
"text": "Security update for libsoup",
"title": "Title of the patch"
},
{
"category": "description",
"text": "This update for libsoup fixes the following issue\n\n- CVE-2026-4271: use-after-free in the HTTP/2 server when user signal handlers disconnect connections during callback\n execution (bsc#1259767).\n",
"title": "Description of the patch"
},
{
"category": "details",
"text": "SUSE-SLE-Micro-6.1-556",
"title": "Patchnames"
},
{
"category": "legal_disclaimer",
"text": "CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).",
"title": "Terms of use"
}
],
"publisher": {
"category": "vendor",
"contact_details": "https://www.suse.com/support/security/contact/",
"name": "SUSE Product Security Team",
"namespace": "https://www.suse.com/"
},
"references": [
{
"category": "external",
"summary": "SUSE ratings",
"url": "https://www.suse.com/support/security/rating/"
},
{
"category": "self",
"summary": "URL of this CSAF notice",
"url": "https://ftp.suse.com/pub/projects/security/csaf/suse-su-2026_21879-1.json"
},
{
"category": "self",
"summary": "URL for SUSE-SU-2026:21879-1",
"url": "https://www.suse.com/support/update/announcement/2026/suse-su-202621879-1/"
},
{
"category": "self",
"summary": "E-Mail link for SUSE-SU-2026:21879-1",
"url": "https://lists.suse.com/pipermail/sle-security-updates/2026-June/026511.html"
},
{
"category": "self",
"summary": "SUSE Bug 1259767",
"url": "https://bugzilla.suse.com/1259767"
},
{
"category": "self",
"summary": "SUSE CVE CVE-2026-4271 page",
"url": "https://www.suse.com/security/cve/CVE-2026-4271/"
}
],
"title": "Security update for libsoup",
"tracking": {
"current_release_date": "2026-09-16T19:52:32Z",
"generator": {
"date": "2026-06-01T10:08:16Z",
"engine": {
"name": "cve-database.git:bin/generate-csaf.pl",
"version": "1"
}
},
"id": "SUSE-SU-2026:21879-1",
"initial_release_date": "2026-06-01T10:08:16Z",
"revision_history": [
{
"date": "2026-06-01T10:08:16Z",
"number": "1",
"summary": "Current version"
},
{
"date": "2026-09-16T19:03:06Z",
"number": "2",
"summary": "unknown changes"
},
{
"date": "2026-09-16T19:52:32Z",
"number": "3",
"summary": "unknown changes"
}
],
"status": "final",
"version": "3"
}
},
"product_tree": {
"branches": [
{
"branches": [
{
"branches": [
{
"category": "product_version",
"name": "libsoup-3_0-0-3.4.4-slfo.1.1_9.1.aarch64",
"product": {
"name": "libsoup-3_0-0-3.4.4-slfo.1.1_9.1.aarch64",
"product_id": "libsoup-3_0-0-3.4.4-slfo.1.1_9.1.aarch64",
"product_identification_helper": {
"cpe": "cpe:2.3:a:gnome:libsoup:3.4.4:*:*:*:*:*:*:*",
"purl": "pkg:rpm/suse/libsoup-3_0-0@3.4.4-slfo.1.1_9.1?arch=aarch64\u0026upstream=libsoup-3.4.4-slfo.1.1_9.1.src.rpm"
}
}
}
],
"category": "architecture",
"name": "aarch64"
},
{
"branches": [
{
"category": "product_version",
"name": "libsoup-3_0-0-3.4.4-slfo.1.1_9.1.ppc64le",
"product": {
"name": "libsoup-3_0-0-3.4.4-slfo.1.1_9.1.ppc64le",
"product_id": "libsoup-3_0-0-3.4.4-slfo.1.1_9.1.ppc64le",
"product_identification_helper": {
"cpe": "cpe:2.3:a:gnome:libsoup:3.4.4:*:*:*:*:*:*:*",
"purl": "pkg:rpm/suse/libsoup-3_0-0@3.4.4-slfo.1.1_9.1?arch=ppc64le\u0026upstream=libsoup-3.4.4-slfo.1.1_9.1.src.rpm"
}
}
}
],
"category": "architecture",
"name": "ppc64le"
},
{
"branches": [
{
"category": "product_version",
"name": "libsoup-3_0-0-3.4.4-slfo.1.1_9.1.s390x",
"product": {
"name": "libsoup-3_0-0-3.4.4-slfo.1.1_9.1.s390x",
"product_id": "libsoup-3_0-0-3.4.4-slfo.1.1_9.1.s390x",
"product_identification_helper": {
"cpe": "cpe:2.3:a:gnome:libsoup:3.4.4:*:*:*:*:*:*:*",
"purl": "pkg:rpm/suse/libsoup-3_0-0@3.4.4-slfo.1.1_9.1?arch=s390x\u0026upstream=libsoup-3.4.4-slfo.1.1_9.1.src.rpm"
}
}
}
],
"category": "architecture",
"name": "s390x"
},
{
"branches": [
{
"category": "product_version",
"name": "libsoup-3_0-0-3.4.4-slfo.1.1_9.1.x86_64",
"product": {
"name": "libsoup-3_0-0-3.4.4-slfo.1.1_9.1.x86_64",
"product_id": "libsoup-3_0-0-3.4.4-slfo.1.1_9.1.x86_64",
"product_identification_helper": {
"cpe": "cpe:2.3:a:gnome:libsoup:3.4.4:*:*:*:*:*:*:*",
"purl": "pkg:rpm/suse/libsoup-3_0-0@3.4.4-slfo.1.1_9.1?arch=x86_64\u0026upstream=libsoup-3.4.4-slfo.1.1_9.1.src.rpm"
}
}
}
],
"category": "architecture",
"name": "x86_64"
},
{
"branches": [
{
"category": "product_name",
"name": "SUSE Linux Micro 6.1",
"product": {
"name": "SUSE Linux Micro 6.1",
"product_id": "SUSE Linux Micro 6.1",
"product_identification_helper": {
"cpe": "cpe:/o:suse:sl-micro:6.1"
}
}
}
],
"category": "product_family",
"name": "SUSE Linux Enterprise"
}
],
"category": "vendor",
"name": "SUSE"
}
],
"relationships": [
{
"category": "default_component_of",
"full_product_name": {
"name": "libsoup-3_0-0-3.4.4-slfo.1.1_9.1.aarch64 as component of SUSE Linux Micro 6.1",
"product_id": "SUSE Linux Micro 6.1:libsoup-3_0-0-3.4.4-slfo.1.1_9.1.aarch64"
},
"product_reference": "libsoup-3_0-0-3.4.4-slfo.1.1_9.1.aarch64",
"relates_to_product_reference": "SUSE Linux Micro 6.1"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libsoup-3_0-0-3.4.4-slfo.1.1_9.1.ppc64le as component of SUSE Linux Micro 6.1",
"product_id": "SUSE Linux Micro 6.1:libsoup-3_0-0-3.4.4-slfo.1.1_9.1.ppc64le"
},
"product_reference": "libsoup-3_0-0-3.4.4-slfo.1.1_9.1.ppc64le",
"relates_to_product_reference": "SUSE Linux Micro 6.1"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libsoup-3_0-0-3.4.4-slfo.1.1_9.1.s390x as component of SUSE Linux Micro 6.1",
"product_id": "SUSE Linux Micro 6.1:libsoup-3_0-0-3.4.4-slfo.1.1_9.1.s390x"
},
"product_reference": "libsoup-3_0-0-3.4.4-slfo.1.1_9.1.s390x",
"relates_to_product_reference": "SUSE Linux Micro 6.1"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "libsoup-3_0-0-3.4.4-slfo.1.1_9.1.x86_64 as component of SUSE Linux Micro 6.1",
"product_id": "SUSE Linux Micro 6.1:libsoup-3_0-0-3.4.4-slfo.1.1_9.1.x86_64"
},
"product_reference": "libsoup-3_0-0-3.4.4-slfo.1.1_9.1.x86_64",
"relates_to_product_reference": "SUSE Linux Micro 6.1"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2026-4271",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-4271"
}
],
"notes": [
{
"category": "general",
"text": "A flaw was found in libsoup, a library for handling HTTP requests. This vulnerability, known as a Use-After-Free, occurs in the HTTP/2 server implementation. A remote attacker can exploit this by sending specially crafted HTTP/2 requests that cause authentication failures. This can lead to the application attempting to access memory that has already been freed, potentially causing application instability or crashes, resulting in a Denial of Service (DoS).",
"title": "CVE description"
}
],
"product_status": {
"recommended": [
"SUSE Linux Micro 6.1:libsoup-3_0-0-3.4.4-slfo.1.1_9.1.aarch64",
"SUSE Linux Micro 6.1:libsoup-3_0-0-3.4.4-slfo.1.1_9.1.ppc64le",
"SUSE Linux Micro 6.1:libsoup-3_0-0-3.4.4-slfo.1.1_9.1.s390x",
"SUSE Linux Micro 6.1:libsoup-3_0-0-3.4.4-slfo.1.1_9.1.x86_64"
]
},
"references": [
{
"category": "external",
"summary": "CVE-2026-4271",
"url": "https://www.suse.com/security/cve/CVE-2026-4271"
},
{
"category": "external",
"summary": "SUSE Bug 1259767 for CVE-2026-4271",
"url": "https://bugzilla.suse.com/1259767"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
"product_ids": [
"SUSE Linux Micro 6.1:libsoup-3_0-0-3.4.4-slfo.1.1_9.1.aarch64",
"SUSE Linux Micro 6.1:libsoup-3_0-0-3.4.4-slfo.1.1_9.1.ppc64le",
"SUSE Linux Micro 6.1:libsoup-3_0-0-3.4.4-slfo.1.1_9.1.s390x",
"SUSE Linux Micro 6.1:libsoup-3_0-0-3.4.4-slfo.1.1_9.1.x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 8.6,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
"version": "3.1"
},
"products": [
"SUSE Linux Micro 6.1:libsoup-3_0-0-3.4.4-slfo.1.1_9.1.aarch64",
"SUSE Linux Micro 6.1:libsoup-3_0-0-3.4.4-slfo.1.1_9.1.ppc64le",
"SUSE Linux Micro 6.1:libsoup-3_0-0-3.4.4-slfo.1.1_9.1.s390x",
"SUSE Linux Micro 6.1:libsoup-3_0-0-3.4.4-slfo.1.1_9.1.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"date": "2026-06-01T10:08:16Z",
"details": "important"
}
],
"title": "CVE-2026-4271"
}
]
}
Loading…
Loading…
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.
Loading…
Loading…
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.
Loading…
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.
Loading…