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DEBIAN-CVE-2026-35091

Type: advisorySource: OSV1 source record

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

Announced Group revision 1
Original source ↗

DEBIAN-CVE-2026-35091

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-35091

corosync

Source reference: /affected/0/package/name

Affected versions
3.1.7-1

Source reference: /affected/0/versions

3.1.7-1+deb12u1

Source reference: /affected/0/versions

Fixed versions
3.1.7-1+deb12u2

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

corosync

Source reference: /affected/1/package/name

Affected versions
3.1.9-2

Source reference: /affected/1/versions

Fixed versions
3.1.9-2+deb13u1

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

corosync

Source reference: /affected/2/package/name

Affected versions
3.1.10-1

Source reference: /affected/2/versions

3.1.9-2

Source reference: /affected/2/versions

Fixed versions
3.1.10-2

Source reference: /affected/2/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.1.7-1+deb12u2"
          }
        ]
      }
    ],
    "package": {
      "name": "corosync",
      "purl": "pkg:deb/debian/corosync?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "3.1.7-1",
      "3.1.7-1+deb12u1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-35091.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.1.9-2+deb13u1"
          }
        ]
      }
    ],
    "package": {
      "name": "corosync",
      "purl": "pkg:deb/debian/corosync?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "3.1.9-2"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-35091.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.1.10-2"
          }
        ]
      }
    ],
    "package": {
      "name": "corosync",
      "purl": "pkg:deb/debian/corosync?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "3.1.10-1",
      "3.1.9-2"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-35091.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#55986 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. DEBIAN-CVE-2026-35091 · Revision 1Source updated