usn-8598-1
Vulnerability from osv_ubuntu
Published
2026-07-23 14:26
Modified
2026-07-23 14:26
Summary
rsyslog vulnerabilities
Details
It was discovered that rsyslog incorrectly handled regex-based TCP framing in the imptcp module. A remote attacker could possibly use this issue to cause rsyslog to crash, resulting in a denial of service.
It was discovered that rsyslog incorrectly handled oversized RFC5424 structured data in the mmpstrucdata module. A remote attacker could possibly use this issue to cause rsyslog to crash, resulting in a denial of service. (CVE-2026-61548)
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-61548",
"severity": [
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:22.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "rsyslog",
"binary_version": "8.2112.0-2ubuntu2.4"
},
{
"binary_name": "rsyslog-czmq",
"binary_version": "8.2112.0-2ubuntu2.4"
},
{
"binary_name": "rsyslog-elasticsearch",
"binary_version": "8.2112.0-2ubuntu2.4"
},
{
"binary_name": "rsyslog-gnutls",
"binary_version": "8.2112.0-2ubuntu2.4"
},
{
"binary_name": "rsyslog-gssapi",
"binary_version": "8.2112.0-2ubuntu2.4"
},
{
"binary_name": "rsyslog-hiredis",
"binary_version": "8.2112.0-2ubuntu2.4"
},
{
"binary_name": "rsyslog-kafka",
"binary_version": "8.2112.0-2ubuntu2.4"
},
{
"binary_name": "rsyslog-kubernetes",
"binary_version": "8.2112.0-2ubuntu2.4"
},
{
"binary_name": "rsyslog-mongodb",
"binary_version": "8.2112.0-2ubuntu2.4"
},
{
"binary_name": "rsyslog-mysql",
"binary_version": "8.2112.0-2ubuntu2.4"
},
{
"binary_name": "rsyslog-openssl",
"binary_version": "8.2112.0-2ubuntu2.4"
},
{
"binary_name": "rsyslog-pgsql",
"binary_version": "8.2112.0-2ubuntu2.4"
},
{
"binary_name": "rsyslog-relp",
"binary_version": "8.2112.0-2ubuntu2.4"
},
{
"binary_name": "rsyslog-snmp",
"binary_version": "8.2112.0-2ubuntu2.4"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "rsyslog",
"purl": "pkg:deb/ubuntu/rsyslog@8.2112.0-2ubuntu2.4?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "8.2112.0-2ubuntu2.4"
}
],
"type": "ECOSYSTEM"
}
],
"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"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-61548",
"severity": [
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:24.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "rsyslog",
"binary_version": "8.2312.0-3ubuntu9.3"
},
{
"binary_name": "rsyslog-czmq",
"binary_version": "8.2312.0-3ubuntu9.3"
},
{
"binary_name": "rsyslog-elasticsearch",
"binary_version": "8.2312.0-3ubuntu9.3"
},
{
"binary_name": "rsyslog-gnutls",
"binary_version": "8.2312.0-3ubuntu9.3"
},
{
"binary_name": "rsyslog-gssapi",
"binary_version": "8.2312.0-3ubuntu9.3"
},
{
"binary_name": "rsyslog-hiredis",
"binary_version": "8.2312.0-3ubuntu9.3"
},
{
"binary_name": "rsyslog-kafka",
"binary_version": "8.2312.0-3ubuntu9.3"
},
{
"binary_name": "rsyslog-kubernetes",
"binary_version": "8.2312.0-3ubuntu9.3"
},
{
"binary_name": "rsyslog-mongodb",
"binary_version": "8.2312.0-3ubuntu9.3"
},
{
"binary_name": "rsyslog-mysql",
"binary_version": "8.2312.0-3ubuntu9.3"
},
{
"binary_name": "rsyslog-openssl",
"binary_version": "8.2312.0-3ubuntu9.3"
},
{
"binary_name": "rsyslog-pgsql",
"binary_version": "8.2312.0-3ubuntu9.3"
},
{
"binary_name": "rsyslog-relp",
"binary_version": "8.2312.0-3ubuntu9.3"
},
{
"binary_name": "rsyslog-snmp",
"binary_version": "8.2312.0-3ubuntu9.3"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "rsyslog",
"purl": "pkg:deb/ubuntu/rsyslog@8.2312.0-3ubuntu9.3?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "8.2312.0-3ubuntu9.3"
}
],
"type": "ECOSYSTEM"
}
],
"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"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-61548",
"severity": [
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:26.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "rsyslog",
"binary_version": "8.2512.0-1ubuntu4.1"
},
{
"binary_name": "rsyslog-clickhouse",
"binary_version": "8.2512.0-1ubuntu4.1"
},
{
"binary_name": "rsyslog-czmq",
"binary_version": "8.2512.0-1ubuntu4.1"
},
{
"binary_name": "rsyslog-docker",
"binary_version": "8.2512.0-1ubuntu4.1"
},
{
"binary_name": "rsyslog-elasticsearch",
"binary_version": "8.2512.0-1ubuntu4.1"
},
{
"binary_name": "rsyslog-gnutls",
"binary_version": "8.2512.0-1ubuntu4.1"
},
{
"binary_name": "rsyslog-gssapi",
"binary_version": "8.2512.0-1ubuntu4.1"
},
{
"binary_name": "rsyslog-hiredis",
"binary_version": "8.2512.0-1ubuntu4.1"
},
{
"binary_name": "rsyslog-kafka",
"binary_version": "8.2512.0-1ubuntu4.1"
},
{
"binary_name": "rsyslog-kubernetes",
"binary_version": "8.2512.0-1ubuntu4.1"
},
{
"binary_name": "rsyslog-mongodb",
"binary_version": "8.2512.0-1ubuntu4.1"
},
{
"binary_name": "rsyslog-mysql",
"binary_version": "8.2512.0-1ubuntu4.1"
},
{
"binary_name": "rsyslog-openssl",
"binary_version": "8.2512.0-1ubuntu4.1"
},
{
"binary_name": "rsyslog-pgsql",
"binary_version": "8.2512.0-1ubuntu4.1"
},
{
"binary_name": "rsyslog-relp",
"binary_version": "8.2512.0-1ubuntu4.1"
},
{
"binary_name": "rsyslog-snmp",
"binary_version": "8.2512.0-1ubuntu4.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "rsyslog",
"purl": "pkg:deb/ubuntu/rsyslog@8.2512.0-1ubuntu4.1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "8.2512.0-1ubuntu4.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"8.2504.0-1ubuntu2",
"8.2512.0-1ubuntu2",
"8.2512.0-1ubuntu3",
"8.2512.0-1ubuntu4"
]
}
],
"aliases": [],
"details": "It was discovered that rsyslog incorrectly handled regex-based TCP framing\nin the imptcp module. A remote attacker could possibly use this issue to\ncause rsyslog to crash, resulting in a denial of service.\n\nIt was discovered that rsyslog incorrectly handled oversized RFC5424\nstructured data in the mmpstrucdata module. A remote attacker could\npossibly use this issue to cause rsyslog to crash, resulting in a denial of\nservice. (CVE-2026-61548)",
"id": "USN-8598-1",
"modified": "2026-07-23T14:26:13Z",
"published": "2026-07-23T14:26:13Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8598-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-61548"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "rsyslog vulnerabilities",
"upstream": [
"UBUNTU-CVE-2026-61548"
]
}
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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.
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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.
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.
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