USN-8170-1 (UBUNTU-CVE-2026-35091)
Vulnerability from osv_ubuntu – Published: 2026-04-13 13:19 – Updated: 2026-04-27 14:11 – Source website
VLAI
Summary
corosync vulnerabilities
Details
It was discovered that Corosync incorrectly handled the membership commit token validity check. A remote attacker could use this issue to cause Corosync to crash, resulting in a denial of service, or to possibly obtain a small quantity of sensitive information. (CVE-2026-35091)
It was discovered that Corosync incorrectly handled join message validation. A remote attacker could possibly use this issue to cause Corosync to crash, resulting in a denial of service. (CVE-2026-35092)
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-35091",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-35092",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:22.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "corosync",
"binary_version": "3.1.6-1ubuntu1.2"
},
{
"binary_name": "corosync-notifyd",
"binary_version": "3.1.6-1ubuntu1.2"
},
{
"binary_name": "corosync-vqsim",
"binary_version": "3.1.6-1ubuntu1.2"
},
{
"binary_name": "libcfg7",
"binary_version": "3.1.6-1ubuntu1.2"
},
{
"binary_name": "libcmap4",
"binary_version": "3.1.6-1ubuntu1.2"
},
{
"binary_name": "libcorosync-common4",
"binary_version": "3.1.6-1ubuntu1.2"
},
{
"binary_name": "libcpg4",
"binary_version": "3.1.6-1ubuntu1.2"
},
{
"binary_name": "libquorum5",
"binary_version": "3.1.6-1ubuntu1.2"
},
{
"binary_name": "libsam4",
"binary_version": "3.1.6-1ubuntu1.2"
},
{
"binary_name": "libvotequorum8",
"binary_version": "3.1.6-1ubuntu1.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "corosync",
"purl": "pkg:deb/ubuntu/corosync@3.1.6-1ubuntu1.2?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.1.6-1ubuntu1.2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.1.2-2ubuntu1",
"3.1.6-1ubuntu1",
"3.1.6-1ubuntu1.1"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-35091",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-35092",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:24.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "corosync",
"binary_version": "3.1.7-1ubuntu3.2"
},
{
"binary_name": "corosync-notifyd",
"binary_version": "3.1.7-1ubuntu3.2"
},
{
"binary_name": "corosync-vqsim",
"binary_version": "3.1.7-1ubuntu3.2"
},
{
"binary_name": "libcfg7",
"binary_version": "3.1.7-1ubuntu3.2"
},
{
"binary_name": "libcmap4",
"binary_version": "3.1.7-1ubuntu3.2"
},
{
"binary_name": "libcorosync-common4",
"binary_version": "3.1.7-1ubuntu3.2"
},
{
"binary_name": "libcpg4",
"binary_version": "3.1.7-1ubuntu3.2"
},
{
"binary_name": "libquorum5",
"binary_version": "3.1.7-1ubuntu3.2"
},
{
"binary_name": "libsam4",
"binary_version": "3.1.7-1ubuntu3.2"
},
{
"binary_name": "libvotequorum8",
"binary_version": "3.1.7-1ubuntu3.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "corosync",
"purl": "pkg:deb/ubuntu/corosync@3.1.7-1ubuntu3.2?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.1.7-1ubuntu3.2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.1.7-1ubuntu1",
"3.1.7-1ubuntu2",
"3.1.7-1ubuntu3",
"3.1.7-1ubuntu3.1"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-35091",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-35092",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:25.10"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "corosync",
"binary_version": "3.1.9-2ubuntu1.1"
},
{
"binary_name": "corosync-notifyd",
"binary_version": "3.1.9-2ubuntu1.1"
},
{
"binary_name": "corosync-vqsim",
"binary_version": "3.1.9-2ubuntu1.1"
},
{
"binary_name": "libcfg7",
"binary_version": "3.1.9-2ubuntu1.1"
},
{
"binary_name": "libcmap4",
"binary_version": "3.1.9-2ubuntu1.1"
},
{
"binary_name": "libcorosync-common4",
"binary_version": "3.1.9-2ubuntu1.1"
},
{
"binary_name": "libcpg4",
"binary_version": "3.1.9-2ubuntu1.1"
},
{
"binary_name": "libquorum5",
"binary_version": "3.1.9-2ubuntu1.1"
},
{
"binary_name": "libsam4",
"binary_version": "3.1.9-2ubuntu1.1"
},
{
"binary_name": "libvotequorum8",
"binary_version": "3.1.9-2ubuntu1.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "corosync",
"purl": "pkg:deb/ubuntu/corosync@3.1.9-2ubuntu1.1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.1.9-2ubuntu1.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.1.8-3ubuntu2",
"3.1.9-2ubuntu1"
]
}
],
"aliases": [],
"details": "It was discovered that Corosync incorrectly handled the membership commit\ntoken validity check. A remote attacker could use this issue to cause\nCorosync to crash, resulting in a denial of service, or to possibly obtain\na small quantity of sensitive information. (CVE-2026-35091)\n\nIt was discovered that Corosync incorrectly handled join message\nvalidation. A remote attacker could possibly use this issue to cause\nCorosync to crash, resulting in a denial of service. (CVE-2026-35092)",
"id": "USN-8170-1",
"modified": "2026-04-27T14:11:51Z",
"published": "2026-04-13T13:19:14Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8170-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-35091"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-35092"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "corosync vulnerabilities",
"upstream": [
"UBUNTU-CVE-2026-35091",
"UBUNTU-CVE-2026-35092"
]
}
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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.
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- 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
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