DEBIAN-CVE-2026-89147
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.
DEBIAN-CVE-2026-89147
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-2026-89147
net-snmp
Source reference: /affected/0/package/name
- Affected versions
- 5.9.3+dfsg-2
Source reference:
/affected/0/versions5.9.3+dfsg-2+deb12u1Source reference:
/affected/0/versions5.9.4+dfsg-1Source reference:
/affected/0/versions5.9.4+dfsg-1.1Source reference:
/affected/0/versions5.9.4+dfsg-1.1~exp1Source reference:
/affected/0/versions5.9.4+dfsg-1.1~exp2Source reference:
/affected/0/versions5.9.4+dfsg-2Source reference:
/affected/0/versions5.9.5.2+dfsg-1Source reference:
/affected/0/versions5.9.5.2+dfsg-2Source reference:
/affected/0/versions5.9.5.2+dfsg-2.1Source reference:
/affected/0/versions5.9.5.2+dfsg-3Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
net-snmp
Source reference: /affected/1/package/name
- Affected versions
- 5.9.4+dfsg-2
Source reference:
/affected/1/versions5.9.4+dfsg-2+deb13u1Source reference:
/affected/1/versions5.9.5.2+dfsg-1Source reference:
/affected/1/versions5.9.5.2+dfsg-2Source reference:
/affected/1/versions5.9.5.2+dfsg-2.1Source reference:
/affected/1/versions5.9.5.2+dfsg-3Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
net-snmp
Source reference: /affected/2/package/name
- Affected versions
- 5.9.4+dfsg-2
Source reference:
/affected/2/versions5.9.5.2+dfsg-1Source reference:
/affected/2/versions5.9.5.2+dfsg-2Source reference:
/affected/2/versions5.9.5.2+dfsg-2.1Source reference:
/affected/2/versions - Fixed versions
- 5.9.5.2+dfsg-3
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"
}
]
}
],
"package": {
"name": "net-snmp",
"purl": "pkg:deb/debian/net-snmp?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"5.9.3+dfsg-2",
"5.9.3+dfsg-2+deb12u1",
"5.9.4+dfsg-1",
"5.9.4+dfsg-1.1",
"5.9.4+dfsg-1.1~exp1",
"5.9.4+dfsg-1.1~exp2",
"5.9.4+dfsg-2",
"5.9.5.2+dfsg-1",
"5.9.5.2+dfsg-2",
"5.9.5.2+dfsg-2.1",
"5.9.5.2+dfsg-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-89147.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "net-snmp",
"purl": "pkg:deb/debian/net-snmp?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"5.9.4+dfsg-2",
"5.9.4+dfsg-2+deb13u1",
"5.9.5.2+dfsg-1",
"5.9.5.2+dfsg-2",
"5.9.5.2+dfsg-2.1",
"5.9.5.2+dfsg-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-89147.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "5.9.5.2+dfsg-3"
}
]
}
],
"package": {
"name": "net-snmp",
"purl": "pkg:deb/debian/net-snmp?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"5.9.4+dfsg-2",
"5.9.5.2+dfsg-1",
"5.9.5.2+dfsg-2",
"5.9.5.2+dfsg-2.1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-89147.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #15032 · Revision 1
- Added to Heist Feed
- Publisher date