MediumFix available
libssh — security advisory
libssh 0.9.4 has a NULL pointer dereference in tftpserver.c if ssh_buffer_new returns NULL.
- Products
- libssh
- Affected versions
- Not specified
- Fixed versions
- 0.7.6-r3, 0.8.9-r1, 0.9.4-r1
- CVEs
- CVE-2020-16135
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 12:04 UTC · Revision 1
Source evidence
libssh 0.9.4 has a NULL pointer dereference in tftpserver.c if ssh_buffer_new returns NULL.
osv:ALPINE-CVE-2020-16135
libssh
Fixed versions: 0.8.9-r1
libssh
Fixed versions: 0.9.4-r1
libssh
Fixed versions: 0.7.6-r3
Complete source record
{
"id": "28b092af33cd6acbffab2121b1254dc8117e6bd2ac7d610f74274d9ba799816a",
"url": "https://osv.dev/vulnerability/ALPINE-CVE-2020-16135",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ALPINE-CVE-2020-16135",
"summary": "libssh 0.9.4 has a NULL pointer dereference in tftpserver.c if ssh_buffer_new returns NULL.",
"evidence": "osv:ALPINE-CVE-2020-16135",
"products": [
{
"name": {
"value": "libssh",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0.8.9-r1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libssh",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0.9.4-r1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libssh",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0.7.6-r3",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
}
],
"severity": "medium",
"structured": {
"id": "ALPINE-CVE-2020-16135",
"aliases": [
"ALPINE-CVE-2020-16135"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.8.9-r1"
}
]
}
],
"package": {
"name": "libssh",
"purl": "pkg:apk/alpine/libssh?arch=source",
"ecosystem": "Alpine:v3.10"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-16135.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.9.4-r1"
}
]
}
],
"package": {
"name": "libssh",
"purl": "pkg:apk/alpine/libssh?arch=source",
"ecosystem": "Alpine:v3.11"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-16135.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.7.6-r3"
}
]
}
],
"package": {
"name": "libssh",
"purl": "pkg:apk/alpine/libssh?arch=source",
"ecosystem": "Alpine:v3.9"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-16135.json"
},
"ecosystem_specific": {}
}
],
"modified": "2026-10-26T11:17:55.136606459Z",
"provider": "osv",
"upstream": [
"CVE-2020-16135"
],
"references": [
"https://security.alpinelinux.org/vuln/CVE-2020-16135"
]
},
"related_cves": [
{
"value": "CVE-2020-16135",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 450455,
"published_at": "2020-07-29T21:15:13.507+00:00"
}