Medium
Security advisory
net-snmp before 5.8.1.pre1 has a double free in usm_free_usmStateReference in snmplib/snmpusm.c via an SNMPv3 GetBulk request. NOTE: this affects net-snmp packages shipped to end users by multiple Linux distributions, but might not affect an upstream release.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2019-20892
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 12:35 UTC · Revision 1
Source evidence
net-snmp before 5.8.1.pre1 has a double free in usm_free_usmStateReference in snmplib/snmpusm.c via an SNMPv3 GetBulk request. NOTE: this affects net-snmp packages shipped to end users by multiple Linux distributions, but might not affect an upstream release.
osv:CVE-2019-20892
Complete source record
{
"id": "05f64e6d17bd1d2cc382a0de6d41cfae272ab42a990d865a87616ce041aebebf",
"url": "https://osv.dev/vulnerability/CVE-2019-20892",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2019-20892",
"summary": "net-snmp before 5.8.1.pre1 has a double free in usm_free_usmStateReference in snmplib/snmpusm.c via an SNMPv3 GetBulk request. NOTE: this affects net-snmp packages shipped to end users by multiple Linux distributions, but might not affect an upstream release.",
"evidence": "osv:CVE-2019-20892",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2019-20892",
"aliases": [
"CVE-2019-20892"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/net-snmp/net-snmp",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"last_affected": "463235edcc53e2477efe35da717fab292741aab5"
},
{
"fixed": "5f881d3bf24599b90d67a45cae7a3eb099cd71c9"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:net-snmp:net-snmp:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"last_affected": "5.8"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "5f881d3bf24599b90d67a45cae7a3eb099cd71c9"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
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"v5.0",
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"v4.1.1",
"v4.1",
"v4.0.1",
"v4.0",
"v3.6.1",
"v3.6",
"v3.5",
"v3.4",
"v3.3",
"v3.2",
"v3.1.3",
"v3.1.2.1",
"v3.1.2",
"v3.1.1",
"v3.1.0.1",
"v3.1",
"v3.0.7.2",
"v3.0.7.1",
"v3.0.7",
"v3.0.6",
"v3.0.5",
"v3.0.4",
"v3.0.3",
"v3.0.2.1",
"v3.0.2",
"v3.0.1",
"v3.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-20892.json",
"vanir_signatures": [
{
"id": "CVE-2019-20892-382d164f",
"digest": {
"length": 1698,
"function_hash": "140177603995878720991195551689799129618"
},
"source": "https://github.com/net-snmp/net-snmp/commit/5f881d3bf24599b90d67a45cae7a3eb099cd71c9",
"target": {
"file": "snmplib/snmp_client.c",
"function": "_clone_pdu_header"
},
"deprecated": false,
"signature_type": "Function",
"signature_version": "v1"
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{
"id": "CVE-2019-20892-5333c152",
"digest": {
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"source": "https://github.com/net-snmp/net-snmp/commit/5f881d3bf24599b90d67a45cae7a3eb099cd71c9",
"target": {
"file": "snmplib/snmpusm.c"
},
"deprecated": false,
"signature_type": "Line",
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},
{
"id": "CVE-2019-20892-57223eb1",
"digest": {
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"function_hash": "159156942628545966179758038413846966703"
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"source": "https://github.com/net-snmp/net-snmp/commit/5f881d3bf24599b90d67a45cae7a3eb099cd71c9",
"target": {
"file": "snmplib/snmpusm.c",
"function": "usm_malloc_usmStateReference"
},
"deprecated": false,
"signature_type": "Function",
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},
{
"id": "CVE-2019-20892-6d822333",
"digest": {
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"function_hash": "88064372202649158328320107912822422421"
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"source": "https://github.com/net-snmp/net-snmp/commit/5f881d3bf24599b90d67a45cae7a3eb099cd71c9",
"target": {
"file": "snmplib/snmpusm.c",
"function": "usm_free_usmStateReference"
},
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"signature_type": "Function",
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},
{
"id": "CVE-2019-20892-81da526f",
"digest": {
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"id": "CVE-2019-20892-d1526ea7",
"digest": {
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"source": "https://github.com/net-snmp/net-snmp/commit/5f881d3bf24599b90d67a45cae7a3eb099cd71c9",
"target": {
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"function": "init_usm"
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"signature_type": "Function",
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],
"vanir_signatures_modified": "2026-10-20T13:55:54Z"
}
}
],
"modified": "2026-10-20T13:55:54.750937705Z",
"provider": "osv",
"references": [
"https://security.gentoo.org/glsa/202008-12",
"https://usn.ubuntu.com/4410-1/",
"https://bugs.launchpad.net/ubuntu/+source/net-snmp/+bug/1877027",
"https://bugzilla.redhat.com/show_bug.cgi?id=1663027",
"https://github.com/net-snmp/net-snmp/commit/5f881d3bf24599b90d67a45cae7a3eb099cd71c9",
"https://www.oracle.com/security-alerts/cpujan2021.html",
"https://sourceforge.net/p/net-snmp/bugs/2923/"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*"
],
"vendor_product": "oracle:zfs_storage_appliance_kit",
"extracted_events": [
{
"range": [
{
"introduced": "8.8"
},
{
"last_affected": "8.8"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2019-20892",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 388394,
"published_at": "2020-06-25T10:15:10.667+00:00"
}