CVE-2026-89147

ADVISORY - nist

Summary

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.

Common Weakness Enumeration (CWE)

ADVISORY - nist

CWE-1088⁠

Synchronous Access of Remote Resource without Timeout

CWE-400⁠

Uncontrolled Resource Consumption

Impacted images

Advisories

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