Unrated

UBUNTU-CVE-2026-93403

Type: advisorySource: OSV1 source record

[Stack-based Buffer Overflow in mmpstrucdata rsyslog plugin]

Announced 23 Sept 2026Group revision 1

UBUNTU-CVE-2026-93403

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:UBUNTU-CVE-2026-93403

rsyslog

Source reference: /affected/0/package/name

Affected versions: 5.8.11-2ubuntu4
Source reference: /affected/0/versions
7.4.4-1ubuntu1
Source reference: /affected/0/versions
7.4.4-1ubuntu2
Source reference: /affected/0/versions
7.4.4-1ubuntu2.1
Source reference: /affected/0/versions
7.4.4-1ubuntu2.3
Source reference: /affected/0/versions
7.4.4-1ubuntu2.5
Source reference: /affected/0/versions
7.4.4-1ubuntu2.6
Source reference: /affected/0/versions
7.4.4-1ubuntu2.7
Source reference: /affected/0/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

rsyslog

Source reference: /affected/1/package/name

Affected versions: 8.12.0-1ubuntu2
Source reference: /affected/1/versions
8.12.0-1ubuntu3
Source reference: /affected/1/versions
8.14.0-2ubuntu1
Source reference: /affected/1/versions
8.14.0-2ubuntu2
Source reference: /affected/1/versions
8.16.0-1ubuntu1
Source reference: /affected/1/versions
8.16.0-1ubuntu2
Source reference: /affected/1/versions
8.16.0-1ubuntu3
Source reference: /affected/1/versions
8.16.0-1ubuntu3.1
Source reference: /affected/1/versions
8.16.0-1ubuntu3.1+esm1
Source reference: /affected/1/versions
8.16.0-1ubuntu3.1+esm2
Source reference: /affected/1/versions
8.16.0-1ubuntu3.1+esm3
Source reference: /affected/1/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

rsyslog

Source reference: /affected/2/package/name

Affected versions: 8.16.0-1ubuntu9
Source reference: /affected/2/versions
8.16.0-1ubuntu10
Source reference: /affected/2/versions
8.32.0-1ubuntu3
Source reference: /affected/2/versions
8.32.0-1ubuntu4
Source reference: /affected/2/versions
8.32.0-1ubuntu4.2
Source reference: /affected/2/versions
8.32.0-1ubuntu4.2+esm1
Source reference: /affected/2/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

rsyslog

Source reference: /affected/3/package/name

Affected versions: 8.1901.0-1ubuntu4
Source reference: /affected/3/versions
8.2001.0-1ubuntu1
Source reference: /affected/3/versions
8.2001.0-1ubuntu1.1
Source reference: /affected/3/versions
8.2001.0-1ubuntu1.3
Source reference: /affected/3/versions
8.2001.0-1ubuntu1.3+esm1
Source reference: /affected/3/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

rsyslog

Source reference: /affected/4/package/name

Affected versions: 8.2102.0-2ubuntu2
Source reference: /affected/4/versions
8.2110.0-3ubuntu1
Source reference: /affected/4/versions
8.2110.0-3ubuntu2
Source reference: /affected/4/versions
8.2110.0-4ubuntu1
Source reference: /affected/4/versions
8.2112.0-2ubuntu2
Source reference: /affected/4/versions
8.2112.0-2ubuntu2.2
Source reference: /affected/4/versions
8.2112.0-2ubuntu2.4
Source reference: /affected/4/versions
8.2112.0-2ubuntu2.5
Source reference: /affected/4/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

rsyslog

Source reference: /affected/5/package/name

Affected versions: 8.2306.0-2ubuntu2
Source reference: /affected/5/versions
8.2312.0-3ubuntu1
Source reference: /affected/5/versions
8.2312.0-3ubuntu2
Source reference: /affected/5/versions
8.2312.0-3ubuntu3
Source reference: /affected/5/versions
8.2312.0-3ubuntu7
Source reference: /affected/5/versions
8.2312.0-3ubuntu8
Source reference: /affected/5/versions
8.2312.0-3ubuntu9
Source reference: /affected/5/versions
8.2312.0-3ubuntu9.1
Source reference: /affected/5/versions
8.2312.0-3ubuntu9.2
Source reference: /affected/5/versions
8.2312.0-3ubuntu9.3
Source reference: /affected/5/versions
8.2312.0-3ubuntu9.4
Source reference: /affected/5/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

rsyslog

Source reference: /affected/6/package/name

Affected versions: 8.2504.0-1ubuntu2
Source reference: /affected/6/versions
8.2512.0-1ubuntu2
Source reference: /affected/6/versions
8.2512.0-1ubuntu3
Source reference: /affected/6/versions
8.2512.0-1ubuntu4
Source reference: /affected/6/versions
8.2512.0-1ubuntu4.1
Source reference: /affected/6/versions
8.2512.0-1ubuntu4.2
Source reference: /affected/6/versions
Fixed versions: Not stated in this record
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"
          }
        ]
      }
    ],
    "package": {
      "name": "rsyslog",
      "purl": "pkg:deb/ubuntu/rsyslog?arch=source&distro=trusty",
      "ecosystem": "Ubuntu:14.04:LTS"
    },
    "versions": [
      "5.8.11-2ubuntu4",
      "7.4.4-1ubuntu1",
      "7.4.4-1ubuntu2",
      "7.4.4-1ubuntu2.1",
      "7.4.4-1ubuntu2.3",
      "7.4.4-1ubuntu2.5",
      "7.4.4-1ubuntu2.6",
      "7.4.4-1ubuntu2.7"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93403.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "rsyslog",
          "binary_version": "7.4.4-1ubuntu2.7"
        },
        {
          "binary_name": "rsyslog-gnutls",
          "binary_version": "7.4.4-1ubuntu2.7"
        },
        {
          "binary_name": "rsyslog-gssapi",
          "binary_version": "7.4.4-1ubuntu2.7"
        },
        {
          "binary_name": "rsyslog-mysql",
          "binary_version": "7.4.4-1ubuntu2.7"
        },
        {
          "binary_name": "rsyslog-pgsql",
          "binary_version": "7.4.4-1ubuntu2.7"
        },
        {
          "binary_name": "rsyslog-relp",
          "binary_version": "7.4.4-1ubuntu2.7"
        }
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "rsyslog",
      "purl": "pkg:deb/ubuntu/rsyslog?arch=source&distro=esm-infra-legacy%2Fxenial",
      "ecosystem": "Ubuntu:Pro:16.04:LTS"
    },
    "versions": [
      "8.12.0-1ubuntu2",
      "8.12.0-1ubuntu3",
      "8.14.0-2ubuntu1",
      "8.14.0-2ubuntu2",
      "8.16.0-1ubuntu1",
      "8.16.0-1ubuntu2",
      "8.16.0-1ubuntu3",
      "8.16.0-1ubuntu3.1",
      "8.16.0-1ubuntu3.1+esm1",
      "8.16.0-1ubuntu3.1+esm2",
      "8.16.0-1ubuntu3.1+esm3"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93403.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "rsyslog",
          "binary_version": "8.16.0-1ubuntu3.1+esm3"
        },
        {
          "binary_name": "rsyslog-elasticsearch",
          "binary_version": "8.16.0-1ubuntu3.1+esm3"
        },
        {
          "binary_name": "rsyslog-gnutls",
          "binary_version": "8.16.0-1ubuntu3.1+esm3"
        },
        {
          "binary_name": "rsyslog-gssapi",
          "binary_version": "8.16.0-1ubuntu3.1+esm3"
        },
        {
          "binary_name": "rsyslog-mysql",
          "binary_version": "8.16.0-1ubuntu3.1+esm3"
        },
        {
          "binary_name": "rsyslog-pgsql",
          "binary_version": "8.16.0-1ubuntu3.1+esm3"
        },
        {
          "binary_name": "rsyslog-relp",
          "binary_version": "8.16.0-1ubuntu3.1+esm3"
        }
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "rsyslog",
      "purl": "pkg:deb/ubuntu/rsyslog?arch=source&distro=esm-infra%2Fbionic",
      "ecosystem": "Ubuntu:Pro:18.04:LTS"
    },
    "versions": [
      "8.16.0-1ubuntu9",
      "8.16.0-1ubuntu10",
      "8.32.0-1ubuntu3",
      "8.32.0-1ubuntu4",
      "8.32.0-1ubuntu4.2",
      "8.32.0-1ubuntu4.2+esm1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93403.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "rsyslog",
          "binary_version": "8.32.0-1ubuntu4.2+esm1"
        },
        {
          "binary_name": "rsyslog-czmq",
          "binary_version": "8.32.0-1ubuntu4.2+esm1"
        },
        {
          "binary_name": "rsyslog-elasticsearch",
          "binary_version": "8.32.0-1ubuntu4.2+esm1"
        },
        {
          "binary_name": "rsyslog-gnutls",
          "binary_version": "8.32.0-1ubuntu4.2+esm1"
        },
        {
          "binary_name": "rsyslog-gssapi",
          "binary_version": "8.32.0-1ubuntu4.2+esm1"
        },
        {
          "binary_name": "rsyslog-hiredis",
          "binary_version": "8.32.0-1ubuntu4.2+esm1"
        },
        {
          "binary_name": "rsyslog-kafka",
          "binary_version": "8.32.0-1ubuntu4.2+esm1"
        },
        {
          "binary_name": "rsyslog-mongodb",
          "binary_version": "8.32.0-1ubuntu4.2+esm1"
        },
        {
          "binary_name": "rsyslog-mysql",
          "binary_version": "8.32.0-1ubuntu4.2+esm1"
        },
        {
          "binary_name": "rsyslog-pgsql",
          "binary_version": "8.32.0-1ubuntu4.2+esm1"
        },
        {
          "binary_name": "rsyslog-relp",
          "binary_version": "8.32.0-1ubuntu4.2+esm1"
        }
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "rsyslog",
      "purl": "pkg:deb/ubuntu/rsyslog?arch=source&distro=esm-infra%2Ffocal",
      "ecosystem": "Ubuntu:Pro:20.04:LTS"
    },
    "versions": [
      "8.1901.0-1ubuntu4",
      "8.2001.0-1ubuntu1",
      "8.2001.0-1ubuntu1.1",
      "8.2001.0-1ubuntu1.3",
      "8.2001.0-1ubuntu1.3+esm1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93403.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "rsyslog",
          "binary_version": "8.2001.0-1ubuntu1.3+esm1"
        },
        {
          "binary_name": "rsyslog-czmq",
          "binary_version": "8.2001.0-1ubuntu1.3+esm1"
        },
        {
          "binary_name": "rsyslog-elasticsearch",
          "binary_version": "8.2001.0-1ubuntu1.3+esm1"
        },
        {
          "binary_name": "rsyslog-gnutls",
          "binary_version": "8.2001.0-1ubuntu1.3+esm1"
        },
        {
          "binary_name": "rsyslog-gssapi",
          "binary_version": "8.2001.0-1ubuntu1.3+esm1"
        },
        {
          "binary_name": "rsyslog-hiredis",
          "binary_version": "8.2001.0-1ubuntu1.3+esm1"
        },
        {
          "binary_name": "rsyslog-kafka",
          "binary_version": "8.2001.0-1ubuntu1.3+esm1"
        },
        {
          "binary_name": "rsyslog-mongodb",
          "binary_version": "8.2001.0-1ubuntu1.3+esm1"
        },
        {
          "binary_name": "rsyslog-mysql",
          "binary_version": "8.2001.0-1ubuntu1.3+esm1"
        },
        {
          "binary_name": "rsyslog-openssl",
          "binary_version": "8.2001.0-1ubuntu1.3+esm1"
        },
        {
          "binary_name": "rsyslog-pgsql",
          "binary_version": "8.2001.0-1ubuntu1.3+esm1"
        },
        {
          "binary_name": "rsyslog-relp",
          "binary_version": "8.2001.0-1ubuntu1.3+esm1"
        }
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "rsyslog",
      "purl": "pkg:deb/ubuntu/rsyslog?arch=source&distro=jammy",
      "ecosystem": "Ubuntu:22.04:LTS"
    },
    "versions": [
      "8.2102.0-2ubuntu2",
      "8.2110.0-3ubuntu1",
      "8.2110.0-3ubuntu2",
      "8.2110.0-4ubuntu1",
      "8.2112.0-2ubuntu2",
      "8.2112.0-2ubuntu2.2",
      "8.2112.0-2ubuntu2.4",
      "8.2112.0-2ubuntu2.5"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93403.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "rsyslog",
          "binary_version": "8.2112.0-2ubuntu2.5"
        },
        {
          "binary_name": "rsyslog-czmq",
          "binary_version": "8.2112.0-2ubuntu2.5"
        },
        {
          "binary_name": "rsyslog-elasticsearch",
          "binary_version": "8.2112.0-2ubuntu2.5"
        },
        {
          "binary_name": "rsyslog-gnutls",
          "binary_version": "8.2112.0-2ubuntu2.5"
        },
        {
          "binary_name": "rsyslog-gssapi",
          "binary_version": "8.2112.0-2ubuntu2.5"
        },
        {
          "binary_name": "rsyslog-hiredis",
          "binary_version": "8.2112.0-2ubuntu2.5"
        },
        {
          "binary_name": "rsyslog-kafka",
          "binary_version": "8.2112.0-2ubuntu2.5"
        },
        {
          "binary_name": "rsyslog-kubernetes",
          "binary_version": "8.2112.0-2ubuntu2.5"
        },
        {
          "binary_name": "rsyslog-mongodb",
          "binary_version": "8.2112.0-2ubuntu2.5"
        },
        {
          "binary_name": "rsyslog-mysql",
          "binary_version": "8.2112.0-2ubuntu2.5"
        },
        {
          "binary_name": "rsyslog-openssl",
          "binary_version": "8.2112.0-2ubuntu2.5"
        },
        {
          "binary_name": "rsyslog-pgsql",
          "binary_version": "8.2112.0-2ubuntu2.5"
        },
        {
          "binary_name": "rsyslog-relp",
          "binary_version": "8.2112.0-2ubuntu2.5"
        },
        {
          "binary_name": "rsyslog-snmp",
          "binary_version": "8.2112.0-2ubuntu2.5"
        }
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "rsyslog",
      "purl": "pkg:deb/ubuntu/rsyslog?arch=source&distro=noble",
      "ecosystem": "Ubuntu:24.04:LTS"
    },
    "versions": [
      "8.2306.0-2ubuntu2",
      "8.2312.0-3ubuntu1",
      "8.2312.0-3ubuntu2",
      "8.2312.0-3ubuntu3",
      "8.2312.0-3ubuntu7",
      "8.2312.0-3ubuntu8",
      "8.2312.0-3ubuntu9",
      "8.2312.0-3ubuntu9.1",
      "8.2312.0-3ubuntu9.2",
      "8.2312.0-3ubuntu9.3",
      "8.2312.0-3ubuntu9.4"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93403.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "rsyslog",
          "binary_version": "8.2312.0-3ubuntu9.4"
        },
        {
          "binary_name": "rsyslog-czmq",
          "binary_version": "8.2312.0-3ubuntu9.4"
        },
        {
          "binary_name": "rsyslog-elasticsearch",
          "binary_version": "8.2312.0-3ubuntu9.4"
        },
        {
          "binary_name": "rsyslog-gnutls",
          "binary_version": "8.2312.0-3ubuntu9.4"
        },
        {
          "binary_name": "rsyslog-gssapi",
          "binary_version": "8.2312.0-3ubuntu9.4"
        },
        {
          "binary_name": "rsyslog-hiredis",
          "binary_version": "8.2312.0-3ubuntu9.4"
        },
        {
          "binary_name": "rsyslog-kafka",
          "binary_version": "8.2312.0-3ubuntu9.4"
        },
        {
          "binary_name": "rsyslog-kubernetes",
          "binary_version": "8.2312.0-3ubuntu9.4"
        },
        {
          "binary_name": "rsyslog-mongodb",
          "binary_version": "8.2312.0-3ubuntu9.4"
        },
        {
          "binary_name": "rsyslog-mysql",
          "binary_version": "8.2312.0-3ubuntu9.4"
        },
        {
          "binary_name": "rsyslog-openssl",
          "binary_version": "8.2312.0-3ubuntu9.4"
        },
        {
          "binary_name": "rsyslog-pgsql",
          "binary_version": "8.2312.0-3ubuntu9.4"
        },
        {
          "binary_name": "rsyslog-relp",
          "binary_version": "8.2312.0-3ubuntu9.4"
        },
        {
          "binary_name": "rsyslog-snmp",
          "binary_version": "8.2312.0-3ubuntu9.4"
        }
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "rsyslog",
      "purl": "pkg:deb/ubuntu/rsyslog?arch=source&distro=resolute",
      "ecosystem": "Ubuntu:26.04:LTS"
    },
    "versions": [
      "8.2504.0-1ubuntu2",
      "8.2512.0-1ubuntu2",
      "8.2512.0-1ubuntu3",
      "8.2512.0-1ubuntu4",
      "8.2512.0-1ubuntu4.1",
      "8.2512.0-1ubuntu4.2"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93403.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "rsyslog",
          "binary_version": "8.2512.0-1ubuntu4.2"
        },
        {
          "binary_name": "rsyslog-clickhouse",
          "binary_version": "8.2512.0-1ubuntu4.2"
        },
        {
          "binary_name": "rsyslog-czmq",
          "binary_version": "8.2512.0-1ubuntu4.2"
        },
        {
          "binary_name": "rsyslog-docker",
          "binary_version": "8.2512.0-1ubuntu4.2"
        },
        {
          "binary_name": "rsyslog-elasticsearch",
          "binary_version": "8.2512.0-1ubuntu4.2"
        },
        {
          "binary_name": "rsyslog-gnutls",
          "binary_version": "8.2512.0-1ubuntu4.2"
        },
        {
          "binary_name": "rsyslog-gssapi",
          "binary_version": "8.2512.0-1ubuntu4.2"
        },
        {
          "binary_name": "rsyslog-hiredis",
          "binary_version": "8.2512.0-1ubuntu4.2"
        },
        {
          "binary_name": "rsyslog-kafka",
          "binary_version": "8.2512.0-1ubuntu4.2"
        },
        {
          "binary_name": "rsyslog-kubernetes",
          "binary_version": "8.2512.0-1ubuntu4.2"
        },
        {
          "binary_name": "rsyslog-mongodb",
          "binary_version": "8.2512.0-1ubuntu4.2"
        },
        {
          "binary_name": "rsyslog-mysql",
          "binary_version": "8.2512.0-1ubuntu4.2"
        },
        {
          "binary_name": "rsyslog-openssl",
          "binary_version": "8.2512.0-1ubuntu4.2"
        },
        {
          "binary_name": "rsyslog-pgsql",
          "binary_version": "8.2512.0-1ubuntu4.2"
        },
        {
          "binary_name": "rsyslog-relp",
          "binary_version": "8.2512.0-1ubuntu4.2"
        },
        {
          "binary_name": "rsyslog-snmp",
          "binary_version": "8.2512.0-1ubuntu4.2"
        }
      ]
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #5847 · Revision 1
Added to Heist Feed: Sat, 24 Oct 2026 22:17:23 GMT
Publisher date: Wed, 23 Sep 2026 00:00:00 GMT

Read the original announcement

Revision history

24 Oct 2026UBUNTU-CVE-2026-93403 · Revision 1Source updated