UBUNTU-CVE-2026-89147
- Source
- https://ubuntu.com/security/CVE-2026-89147
- Import Source
- https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-89147.json
- JSON Data
- https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-89147
- Upstream
- Published
- 2026-09-14T00:00:00Z
- Modified
- 2026-09-14T11:17:33Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
- Ubuntu - medium
- Summary
- [none]
- Details
-
Net-SNMP through 5.9.5.2 contains a denial of service vulnerability in the SMUX module where smux_accept() performs an unauthenticated blocking read without timeout on newly accepted connections. An unauthenticated remote client can connect to the SMUX listener and send no data, causing the single-threaded snmpd main loop to block indefinitely and suspend all SNMP processing.
- References
-
- https://ubuntu.com/security/CVE-2026-89147
- https://www.cve.org/CVERecord?id=CVE-2026-89147
- https://gist.github.com/thesmartshadow/001cea595e75fed6aaea7389666dc9eb
- https://github.com/net-snmp/net-snmp
- https://github.com/net-snmp/net-snmp/blob/v5.9.5.2/agent/mibgroup/smux/smux.c
- https://www.vulncheck.com/advisories/net-snmp-through-5.9.5.2-denial-of-service-via-blocking-unauthenticated-smux-read
Affected packages
Ubuntu:22.04:LTS
net-snmp
Package
- Name
- net-snmp
- Purl
- pkg:deb/ubuntu/net-snmp?arch=source&distro=jammy
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Affected versions
5.*
5.9+dfsg-3ubuntu2
5.9+dfsg-3ubuntu3
5.9+dfsg-3ubuntu4
5.9.1+dfsg-1ubuntu1
5.9.1+dfsg-1ubuntu2
5.9.1+dfsg-1ubuntu2.1
5.9.1+dfsg-1ubuntu2.2
5.9.1+dfsg-1ubuntu2.4
5.9.1+dfsg-1ubuntu2.5
5.9.1+dfsg-1ubuntu2.6
5.9.1+dfsg-1ubuntu2.7
5.9.1+dfsg-1ubuntu2.8
5.9.1+dfsg-1ubuntu2.9
Ecosystem specific
{
"binaries": [
{
"binary_name": "libnetsnmptrapd40",
"binary_version": "5.9.1+dfsg-1ubuntu2.9"
},
{
"binary_name": "libsnmp-base",
"binary_version": "5.9.1+dfsg-1ubuntu2.9"
},
{
"binary_name": "libsnmp-perl",
"binary_version": "5.9.1+dfsg-1ubuntu2.9"
},
{
"binary_name": "libsnmp40",
"binary_version": "5.9.1+dfsg-1ubuntu2.9"
},
{
"binary_name": "snmp",
"binary_version": "5.9.1+dfsg-1ubuntu2.9"
},
{
"binary_name": "snmpd",
"binary_version": "5.9.1+dfsg-1ubuntu2.9"
},
{
"binary_name": "snmptrapd",
"binary_version": "5.9.1+dfsg-1ubuntu2.9"
},
{
"binary_name": "tkmib",
"binary_version": "5.9.1+dfsg-1ubuntu2.9"
}
]
}Ubuntu:24.04:LTS
net-snmp
Package
- Name
- net-snmp
- Purl
- pkg:deb/ubuntu/net-snmp?arch=source&distro=noble
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Affected versions
5.*
5.9.3+dfsg-2ubuntu3
5.9.4+dfsg-1ubuntu1
5.9.4+dfsg-1ubuntu2
5.9.4+dfsg-1.1ubuntu2
5.9.4+dfsg-1.1ubuntu3
5.9.4+dfsg-1.1ubuntu3.1
5.9.4+dfsg-1.1ubuntu3.2
Ecosystem specific
{
"binaries": [
{
"binary_name": "libnetsnmptrapd40t64",
"binary_version": "5.9.4+dfsg-1.1ubuntu3.2"
},
{
"binary_name": "libsnmp-base",
"binary_version": "5.9.4+dfsg-1.1ubuntu3.2"
},
{
"binary_name": "libsnmp-perl",
"binary_version": "5.9.4+dfsg-1.1ubuntu3.2"
},
{
"binary_name": "libsnmp40t64",
"binary_version": "5.9.4+dfsg-1.1ubuntu3.2"
},
{
"binary_name": "snmp",
"binary_version": "5.9.4+dfsg-1.1ubuntu3.2"
},
{
"binary_name": "snmpd",
"binary_version": "5.9.4+dfsg-1.1ubuntu3.2"
},
{
"binary_name": "snmptrapd",
"binary_version": "5.9.4+dfsg-1.1ubuntu3.2"
},
{
"binary_name": "tkmib",
"binary_version": "5.9.4+dfsg-1.1ubuntu3.2"
}
]
}Ubuntu:26.04:LTS
net-snmp
Package
- Name
- net-snmp
- Purl
- pkg:deb/ubuntu/net-snmp?arch=source&distro=resolute
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Ecosystem specific
{
"binaries": [
{
"binary_name": "libnetsnmptrapd40t64",
"binary_version": "5.9.4+dfsg-2ubuntu3"
},
{
"binary_name": "libsnmp-base",
"binary_version": "5.9.4+dfsg-2ubuntu3"
},
{
"binary_name": "libsnmp-perl",
"binary_version": "5.9.4+dfsg-2ubuntu3"
},
{
"binary_name": "libsnmp40t64",
"binary_version": "5.9.4+dfsg-2ubuntu3"
},
{
"binary_name": "snmp",
"binary_version": "5.9.4+dfsg-2ubuntu3"
},
{
"binary_name": "snmpd",
"binary_version": "5.9.4+dfsg-2ubuntu3"
},
{
"binary_name": "snmptrapd",
"binary_version": "5.9.4+dfsg-2ubuntu3"
},
{
"binary_name": "tkmib",
"binary_version": "5.9.4+dfsg-2ubuntu3"
}
]
}Ubuntu:Pro:14.04:LTS
net-snmp
Package
- Name
- net-snmp
- Purl
- pkg:deb/ubuntu/net-snmp?arch=source&distro=esm-infra-legacy%2Ftrusty
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Affected versions
5.*
5.7.2~dfsg-8ubuntu1
5.7.2~dfsg-8ubuntu2
5.7.2~dfsg-8.1ubuntu1
5.7.2~dfsg-8.1ubuntu2
5.7.2~dfsg-8.1ubuntu3
5.7.2~dfsg-8.1ubuntu3.1
5.7.2~dfsg-8.1ubuntu3.2
5.7.2~dfsg-8.1ubuntu3.3
5.7.2~dfsg-8.1ubuntu3.3+esm1
5.7.2~dfsg-8.1ubuntu3.3+esm2
5.7.2~dfsg-8.1ubuntu3.3+esm3
5.7.2~dfsg-8.1ubuntu3.3+esm4
Ecosystem specific
{
"binaries": [
{
"binary_name": "libsnmp-base",
"binary_version": "5.7.2~dfsg-8.1ubuntu3.3+esm4"
},
{
"binary_name": "libsnmp-perl",
"binary_version": "5.7.2~dfsg-8.1ubuntu3.3+esm4"
},
{
"binary_name": "libsnmp30",
"binary_version": "5.7.2~dfsg-8.1ubuntu3.3+esm4"
},
{
"binary_name": "python-netsnmp",
"binary_version": "5.7.2~dfsg-8.1ubuntu3.3+esm4"
},
{
"binary_name": "snmp",
"binary_version": "5.7.2~dfsg-8.1ubuntu3.3+esm4"
},
{
"binary_name": "snmpd",
"binary_version": "5.7.2~dfsg-8.1ubuntu3.3+esm4"
},
{
"binary_name": "tkmib",
"binary_version": "5.7.2~dfsg-8.1ubuntu3.3+esm4"
}
]
}Ubuntu:Pro:16.04:LTS
net-snmp
Package
- Name
- net-snmp
- Purl
- pkg:deb/ubuntu/net-snmp?arch=source&distro=esm-infra%2Fxenial
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Affected versions
5.*
5.7.3+dfsg-1ubuntu2
5.7.3+dfsg-1ubuntu3
5.7.3+dfsg-1ubuntu4
5.7.3+dfsg-1ubuntu4.1
5.7.3+dfsg-1ubuntu4.2
5.7.3+dfsg-1ubuntu4.3
5.7.3+dfsg-1ubuntu4.4
5.7.3+dfsg-1ubuntu4.5
5.7.3+dfsg-1ubuntu4.6
5.7.3+dfsg-1ubuntu4.6+esm1
5.7.3+dfsg-1ubuntu4.6+esm2
Ecosystem specific
{
"binaries": [
{
"binary_name": "libsnmp-base",
"binary_version": "5.7.3+dfsg-1ubuntu4.6+esm2"
},
{
"binary_name": "libsnmp-perl",
"binary_version": "5.7.3+dfsg-1ubuntu4.6+esm2"
},
{
"binary_name": "libsnmp30",
"binary_version": "5.7.3+dfsg-1ubuntu4.6+esm2"
},
{
"binary_name": "python-netsnmp",
"binary_version": "5.7.3+dfsg-1ubuntu4.6+esm2"
},
{
"binary_name": "snmp",
"binary_version": "5.7.3+dfsg-1ubuntu4.6+esm2"
},
{
"binary_name": "snmpd",
"binary_version": "5.7.3+dfsg-1ubuntu4.6+esm2"
},
{
"binary_name": "snmptrapd",
"binary_version": "5.7.3+dfsg-1ubuntu4.6+esm2"
},
{
"binary_name": "tkmib",
"binary_version": "5.7.3+dfsg-1ubuntu4.6+esm2"
}
]
}Ubuntu:Pro:18.04:LTS
net-snmp
Package
- Name
- net-snmp
- Purl
- pkg:deb/ubuntu/net-snmp?arch=source&distro=esm-infra%2Fbionic
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Affected versions
5.*
5.7.3+dfsg-1.7ubuntu1
5.7.3+dfsg-1.8ubuntu1
5.7.3+dfsg-1.8ubuntu2
5.7.3+dfsg-1.8ubuntu3
5.7.3+dfsg-1.8ubuntu3.1
5.7.3+dfsg-1.8ubuntu3.2
5.7.3+dfsg-1.8ubuntu3.3
5.7.3+dfsg-1.8ubuntu3.5
5.7.3+dfsg-1.8ubuntu3.6
5.7.3+dfsg-1.8ubuntu3.7
5.7.3+dfsg-1.8ubuntu3.8
5.7.3+dfsg-1.8ubuntu3.8+esm1
Ecosystem specific
{
"binaries": [
{
"binary_name": "libsnmp-base",
"binary_version": "5.7.3+dfsg-1.8ubuntu3.8+esm1"
},
{
"binary_name": "libsnmp-perl",
"binary_version": "5.7.3+dfsg-1.8ubuntu3.8+esm1"
},
{
"binary_name": "libsnmp30",
"binary_version": "5.7.3+dfsg-1.8ubuntu3.8+esm1"
},
{
"binary_name": "python-netsnmp",
"binary_version": "5.7.3+dfsg-1.8ubuntu3.8+esm1"
},
{
"binary_name": "snmp",
"binary_version": "5.7.3+dfsg-1.8ubuntu3.8+esm1"
},
{
"binary_name": "snmpd",
"binary_version": "5.7.3+dfsg-1.8ubuntu3.8+esm1"
},
{
"binary_name": "snmptrapd",
"binary_version": "5.7.3+dfsg-1.8ubuntu3.8+esm1"
},
{
"binary_name": "tkmib",
"binary_version": "5.7.3+dfsg-1.8ubuntu3.8+esm1"
}
]
}Ubuntu:Pro:20.04:LTS
net-snmp
Package
- Name
- net-snmp
- Purl
- pkg:deb/ubuntu/net-snmp?arch=source&distro=esm-infra%2Ffocal
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Affected versions
5.*
5.7.3+dfsg-5ubuntu5
5.7.3+dfsg-5ubuntu6
5.8+dfsg-2ubuntu1
5.8+dfsg-2ubuntu2
5.8+dfsg-2ubuntu2.1
5.8+dfsg-2ubuntu2.2
5.8+dfsg-2ubuntu2.3
5.8+dfsg-2ubuntu2.4
5.8+dfsg-2ubuntu2.5
5.8+dfsg-2ubuntu2.6
5.8+dfsg-2ubuntu2.7
5.8+dfsg-2ubuntu2.9
5.8+dfsg-2ubuntu2.9+esm1
5.8+dfsg-2ubuntu2.9+esm2
Ecosystem specific
{
"binaries": [
{
"binary_name": "libsnmp-base",
"binary_version": "5.8+dfsg-2ubuntu2.9+esm2"
},
{
"binary_name": "libsnmp-perl",
"binary_version": "5.8+dfsg-2ubuntu2.9+esm2"
},
{
"binary_name": "libsnmp35",
"binary_version": "5.8+dfsg-2ubuntu2.9+esm2"
},
{
"binary_name": "snmp",
"binary_version": "5.8+dfsg-2ubuntu2.9+esm2"
},
{
"binary_name": "snmpd",
"binary_version": "5.8+dfsg-2ubuntu2.9+esm2"
},
{
"binary_name": "snmptrapd",
"binary_version": "5.8+dfsg-2ubuntu2.9+esm2"
},
{
"binary_name": "tkmib",
"binary_version": "5.8+dfsg-2ubuntu2.9+esm2"
}
]
}