{"id":"DEBIAN-CVE-2026-89147","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.","modified":"2026-09-25T08:47:24.832687204Z","published":"2026-09-11T11:16:58.040Z","upstream":["CVE-2026-89147"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-89147"}],"affected":[{"package":{"name":"net-snmp","ecosystem":"Debian:12","purl":"pkg:deb/debian/net-snmp?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"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"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-89147.json"}},{"package":{"name":"net-snmp","ecosystem":"Debian:13","purl":"pkg:deb/debian/net-snmp?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"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"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-89147.json"}},{"package":{"name":"net-snmp","ecosystem":"Debian:14","purl":"pkg:deb/debian/net-snmp?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.9.5.2+dfsg-3"}]}],"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"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-89147.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}