USN-8598-1

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Source
https://ubuntu.com/security/notices/USN-8598-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8598-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8598-1
Upstream
Related
UBUNTU (2)
Published
2026-07-23T14:26:13Z
Modified
2026-09-21T10:00:32Z
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

Affected packages

Ubuntu:22.04:LTS / rsyslog

Package

Name
rsyslog
Purl
pkg:deb/ubuntu/rsyslog?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
8.2112.0-2ubuntu2.4

Affected versions

8.*
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

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"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-61548",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:22.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8598-1.json"

Ubuntu:24.04:LTS / rsyslog

Package

Name
rsyslog
Purl
pkg:deb/ubuntu/rsyslog?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
8.2312.0-3ubuntu9.3

Affected versions

8.*
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

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"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-61548",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:24.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8598-1.json"

Ubuntu:26.04:LTS / rsyslog

Package

Name
rsyslog
Purl
pkg:deb/ubuntu/rsyslog?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
8.2512.0-1ubuntu4.1

Affected versions

8.*
8.2504.0-1ubuntu2
8.2512.0-1ubuntu2
8.2512.0-1ubuntu3
8.2512.0-1ubuntu4

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"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-61548",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:26.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8598-1.json"