Resource Exhaustion Affecting net-snmp package, versions <5.9.5.2+dfsg-3


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.49% (40th percentile)

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  • Snyk IDSNYK-DEBIAN14-NETSNMP-19687855
  • published12 Sept 2026
  • disclosed11 Sept 2026

Introduced: 11 Sep 2026

CVE-2026-89147  (opens in a new tab)
CWE-400  (opens in a new tab)
CWE-1088  (opens in a new tab)

How to fix?

Upgrade Debian:14 net-snmp to version 5.9.5.2+dfsg-3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream net-snmp package and not the net-snmp package as distributed by Debian. See How to fix? for Debian:14 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1