ubuntu-cve-2026-35091
Vulnerability from osv_ubuntu
Published
2026-04-01 14:16
Modified
2026-05-20 21:47
Summary
Details
A flaw was found in Corosync. A remote unauthenticated attacker can exploit a wrong return value vulnerability in the Corosync membership commit token sanity check by sending a specially crafted User Datagram Protocol (UDP) packet. This can lead to an out-of-bounds read, causing a denial of service (DoS) and potentially disclosing limited memory contents
Severity
8.2 (High)
N/A (UNKNOWN)
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "corosync",
"binary_version": "2.3.5-3ubuntu2.3"
},
{
"binary_name": "corosync-notifyd",
"binary_version": "2.3.5-3ubuntu2.3"
},
{
"binary_name": "libcfg6",
"binary_version": "2.3.5-3ubuntu2.3"
},
{
"binary_name": "libcmap4",
"binary_version": "2.3.5-3ubuntu2.3"
},
{
"binary_name": "libcorosync-common4",
"binary_version": "2.3.5-3ubuntu2.3"
},
{
"binary_name": "libcpg4",
"binary_version": "2.3.5-3ubuntu2.3"
},
{
"binary_name": "libquorum5",
"binary_version": "2.3.5-3ubuntu2.3"
},
{
"binary_name": "libsam4",
"binary_version": "2.3.5-3ubuntu2.3"
},
{
"binary_name": "libtotem-pg5",
"binary_version": "2.3.5-3ubuntu2.3"
},
{
"binary_name": "libvotequorum7",
"binary_version": "2.3.5-3ubuntu2.3"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "corosync",
"purl": "pkg:deb/ubuntu/corosync@2.3.5-3ubuntu2.3?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.3.4-0ubuntu1",
"2.3.5-3",
"2.3.5-3ubuntu1",
"2.3.5-3ubuntu2",
"2.3.5-3ubuntu2.1",
"2.3.5-3ubuntu2.3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "corosync",
"binary_version": "2.4.3-0ubuntu1.3"
},
{
"binary_name": "corosync-notifyd",
"binary_version": "2.4.3-0ubuntu1.3"
},
{
"binary_name": "corosync-qdevice",
"binary_version": "2.4.3-0ubuntu1.3"
},
{
"binary_name": "corosync-qnetd",
"binary_version": "2.4.3-0ubuntu1.3"
},
{
"binary_name": "libcfg6",
"binary_version": "2.4.3-0ubuntu1.3"
},
{
"binary_name": "libcmap4",
"binary_version": "2.4.3-0ubuntu1.3"
},
{
"binary_name": "libcorosync-common4",
"binary_version": "2.4.3-0ubuntu1.3"
},
{
"binary_name": "libcpg4",
"binary_version": "2.4.3-0ubuntu1.3"
},
{
"binary_name": "libquorum5",
"binary_version": "2.4.3-0ubuntu1.3"
},
{
"binary_name": "libsam4",
"binary_version": "2.4.3-0ubuntu1.3"
},
{
"binary_name": "libtotem-pg5",
"binary_version": "2.4.3-0ubuntu1.3"
},
{
"binary_name": "libvotequorum8",
"binary_version": "2.4.3-0ubuntu1.3"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "corosync",
"purl": "pkg:deb/ubuntu/corosync@2.4.3-0ubuntu1.3?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.4.2-3build1",
"2.4.2-3ubuntu1",
"2.4.3-0ubuntu1",
"2.4.3-0ubuntu1.1",
"2.4.3-0ubuntu1.2",
"2.4.3-0ubuntu1.3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "corosync",
"binary_version": "3.0.3-2ubuntu2.2"
},
{
"binary_name": "corosync-notifyd",
"binary_version": "3.0.3-2ubuntu2.2"
},
{
"binary_name": "corosync-vqsim",
"binary_version": "3.0.3-2ubuntu2.2"
},
{
"binary_name": "libcfg7",
"binary_version": "3.0.3-2ubuntu2.2"
},
{
"binary_name": "libcmap4",
"binary_version": "3.0.3-2ubuntu2.2"
},
{
"binary_name": "libcorosync-common4",
"binary_version": "3.0.3-2ubuntu2.2"
},
{
"binary_name": "libcpg4",
"binary_version": "3.0.3-2ubuntu2.2"
},
{
"binary_name": "libquorum5",
"binary_version": "3.0.3-2ubuntu2.2"
},
{
"binary_name": "libsam4",
"binary_version": "3.0.3-2ubuntu2.2"
},
{
"binary_name": "libvotequorum8",
"binary_version": "3.0.3-2ubuntu2.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "corosync",
"purl": "pkg:deb/ubuntu/corosync@3.0.3-2ubuntu2.2?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.0.1-2ubuntu1",
"3.0.2-1ubuntu1",
"3.0.2-1ubuntu2",
"3.0.3-2ubuntu1",
"3.0.3-2ubuntu2",
"3.0.3-2ubuntu2.1",
"3.0.3-2ubuntu2.2"
]
},
{
"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"
]
},
{
"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"
]
},
{
"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": "A flaw was found in Corosync. A remote unauthenticated attacker can exploit a wrong return value vulnerability in the Corosync membership commit token sanity check by sending a specially crafted User Datagram Protocol (UDP) packet. This can lead to an out-of-bounds read, causing a denial of service (DoS) and potentially disclosing limited memory contents",
"id": "UBUNTU-CVE-2026-35091",
"modified": "2026-05-20T21:47:02Z",
"published": "2026-04-01T14:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-35091"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-35091"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8170-1"
}
],
"related": [
"USN-8170-1"
],
"schema_version": "1.7.0",
"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"
}
],
"upstream": [
"CVE-2026-35091"
]
}
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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.
- 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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