LowFix available
openssh — security advisory
ssh in OpenSSH before 10.1 allows control characters in usernames that originate from certain possibly untrusted sources, potentially leading to code execution when a ProxyCommand is used. The untrusted sources are the command line and %-sequence expansion of a configuration file. (A configuration file that provides a complete literal username is not categorized as an untrusted source.)
- Products
- openssh
- Affected versions
- 1:10.0p1-7, 1:10.0p1-8, 1:9.2p1-2, 1:9.2p1-2+deb12u1, 1:9.2p1-2+deb12u2, 1:9.2p1-2+deb12u3, 1:9.2p1-2+deb12u4, 1:9.2p1-2+deb12u5, 1:9.2p1-2+deb12u6, 1:9.2p1-2+deb12u7
- Fixed versions
- 1:10.0p1-7+deb13u1, 1:10.1p1-1, 1:9.2p1-2+deb12u8
- CVEs
- CVE-2025-61984
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 16:54 UTC · Revision 1
Source evidence
ssh in OpenSSH before 10.1 allows control characters in usernames that originate from certain possibly untrusted sources, potentially leading to code execution when a ProxyCommand is used. The untrusted sources are the command line and %-sequence expansion of a configuration file. (A configuration file that provides a complete literal username is not categorized as an untrusted source.)
osv:DEBIAN-CVE-2025-61984
openssh
Fixed versions: 1:9.2p1-2+deb12u8
openssh
Fixed versions: 1:10.0p1-7+deb13u1
openssh
Fixed versions: 1:10.1p1-1
Complete source record
{
"id": "08d706c23f313b6821b57978c6354922c475ccc98b41410af408b354abfde723",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2025-61984",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2025-61984",
"summary": "ssh in OpenSSH before 10.1 allows control characters in usernames that originate from certain possibly untrusted sources, potentially leading to code execution when a ProxyCommand is used. The untrusted sources are the command line and %-sequence expansion of a configuration file. (A configuration file that provides a complete literal username is not categorized as an untrusted source.)",
"evidence": "osv:DEBIAN-CVE-2025-61984",
"products": [
{
"name": {
"value": "openssh",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:9.2p1-2+deb12u8",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": [
{
"value": "1:9.2p1-2",
"evidence": "/affected/0/versions"
},
{
"value": "1:9.2p1-2+deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "1:9.2p1-2+deb12u2",
"evidence": "/affected/0/versions"
},
{
"value": "1:9.2p1-2+deb12u3",
"evidence": "/affected/0/versions"
},
{
"value": "1:9.2p1-2+deb12u4",
"evidence": "/affected/0/versions"
},
{
"value": "1:9.2p1-2+deb12u5",
"evidence": "/affected/0/versions"
},
{
"value": "1:9.2p1-2+deb12u6",
"evidence": "/affected/0/versions"
},
{
"value": "1:9.2p1-2+deb12u7",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "openssh",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:10.0p1-7+deb13u1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": [
{
"value": "1:10.0p1-7",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "openssh",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:10.1p1-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "1:10.0p1-7",
"evidence": "/affected/2/versions"
},
{
"value": "1:10.0p1-8",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "low",
"structured": {
"id": "DEBIAN-CVE-2025-61984",
"aliases": [
"DEBIAN-CVE-2025-61984"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:9.2p1-2+deb12u8"
}
]
}
],
"package": {
"name": "openssh",
"purl": "pkg:deb/debian/openssh?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"1:9.2p1-2",
"1:9.2p1-2+deb12u1",
"1:9.2p1-2+deb12u2",
"1:9.2p1-2+deb12u3",
"1:9.2p1-2+deb12u4",
"1:9.2p1-2+deb12u5",
"1:9.2p1-2+deb12u6",
"1:9.2p1-2+deb12u7"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-61984.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:10.0p1-7+deb13u1"
}
]
}
],
"package": {
"name": "openssh",
"purl": "pkg:deb/debian/openssh?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1:10.0p1-7"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-61984.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:10.1p1-1"
}
]
}
],
"package": {
"name": "openssh",
"purl": "pkg:deb/debian/openssh?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1:10.0p1-7",
"1:10.0p1-8"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-61984.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-15T09:47:43.710798866Z",
"provider": "osv",
"upstream": [
"CVE-2025-61984"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2025-61984"
]
},
"related_cves": [
{
"value": "CVE-2025-61984",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 328528,
"published_at": "2025-10-06T19:15:36.157+00:00"
}