openssh: Fix of 4 CVEs
- CVE-2026-106555: sshd kept GSSAPI client state from a partially completed authentication attempt and could reuse it in a later attempt; reset it before each attempt. Backport upstream commits 670510d1 and d549f99d. - CVE-2026-106553: sshd stored delegated GSSAPI credentials even when GSSAPI user authorization had not succeeded; store them only after it succeeds. Backport upstream commit 6f9cd19a. - CVE-2026-106583: ssh(1) accepted '$' and '\' in a command-line user name, allowing injection via shell-expanded commands; reject both characters. Backport upstream commit 0c4c9a7b. - CVE-2026-106585: a compressed packet could inflate far beyond the maximum packet size and exhaust memory; reject it once the decompressed payload reaches PACKET_MAX_SIZE. Backport upstream commit e0f85d83.
- Products
- openssh, openssh-askpass, openssh-cavs, openssh-clients, openssh-keycat, openssh-ldap, openssh-server, pam_ssh_agent_auth
- Affected versions
- Not specified
- Fixed versions
- 0.10.3-7.6.el8_4.1.tuxcare.els15, 8.0p1-6.el8_4.2.tuxcare.els15
- CVEs
- CVE-2026-106553, CVE-2026-106555, CVE-2026-106583, CVE-2026-106585
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 11:48 UTC · Revision 1
Source evidence
- CVE-2026-106555: sshd kept GSSAPI client state from a partially completed authentication attempt and could reuse it in a later attempt; reset it before each attempt. Backport upstream commits 670510d1 and d549f99d. - CVE-2026-106553: sshd stored delegated GSSAPI credentials even when GSSAPI user authorization had not succeeded; store them only after it succeeds. Backport upstream commit 6f9cd19a. - CVE-2026-106583: ssh(1) accepted '$' and '\' in a command-line user name, allowing injection via shell-expanded commands; reject both characters. Backport upstream commit 0c4c9a7b. - CVE-2026-106585: a compressed packet could inflate far beyond the maximum packet size and exhaust memory; reject it once the decompressed payload reaches PACKET_MAX_SIZE. Backport upstream commit e0f85d83.
osv:CLSA-2026-1792933338
openssh
Fixed versions: 8.0p1-6.el8_4.2.tuxcare.els15
openssh-askpass
Fixed versions: 8.0p1-6.el8_4.2.tuxcare.els15
openssh-cavs
Fixed versions: 8.0p1-6.el8_4.2.tuxcare.els15
openssh-clients
Fixed versions: 8.0p1-6.el8_4.2.tuxcare.els15
openssh-keycat
Fixed versions: 8.0p1-6.el8_4.2.tuxcare.els15
openssh-ldap
Fixed versions: 8.0p1-6.el8_4.2.tuxcare.els15
openssh-server
Fixed versions: 8.0p1-6.el8_4.2.tuxcare.els15
pam_ssh_agent_auth
Fixed versions: 0.10.3-7.6.el8_4.1.tuxcare.els15
Complete source record
{
"id": "ce51bc0932dd3014a58a36c0c02bcdb63cdb124abeecb2efc2d5d1dca3ea57e6",
"url": "https://osv.dev/vulnerability/CLSA-2026-1792933338",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "openssh: Fix of 4 CVEs",
"summary": "- CVE-2026-106555: sshd kept GSSAPI client state from a partially completed authentication attempt and could reuse it in a later attempt; reset it before each attempt. Backport upstream commits 670510d1 and d549f99d. - CVE-2026-106553: sshd stored delegated GSSAPI credentials even when GSSAPI user authorization had not succeeded; store them only after it succeeds. Backport upstream commit 6f9cd19a. - CVE-2026-106583: ssh(1) accepted '$' and '\\' in a command-line user name, allowing injection via shell-expanded commands; reject both characters. Backport upstream commit 0c4c9a7b. - CVE-2026-106585: a compressed packet could inflate far beyond the maximum packet size and exhaust memory; reject it once the decompressed payload reaches PACKET_MAX_SIZE. Backport upstream commit e0f85d83.",
"evidence": "osv:CLSA-2026-1792933338",
"products": [
{
"name": {
"value": "openssh",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "8.0p1-6.el8_4.2.tuxcare.els15",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "openssh-askpass",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "8.0p1-6.el8_4.2.tuxcare.els15",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "openssh-cavs",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "8.0p1-6.el8_4.2.tuxcare.els15",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "openssh-clients",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "8.0p1-6.el8_4.2.tuxcare.els15",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "openssh-keycat",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "8.0p1-6.el8_4.2.tuxcare.els15",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "openssh-ldap",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "8.0p1-6.el8_4.2.tuxcare.els15",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "openssh-server",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "8.0p1-6.el8_4.2.tuxcare.els15",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "pam_ssh_agent_auth",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0.10.3-7.6.el8_4.1.tuxcare.els15",
"evidence": "/affected/7/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1792933338",
"aliases": [
"CLSA-2026-1792933338"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "8.0p1-6.el8_4.2.tuxcare.els15"
}
]
}
],
"package": {
"name": "openssh",
"purl": "pkg:rpm/tuxcare/openssh?distro=centos-8.4",
"ecosystem": "TuxCare:CentOS:8.4"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.4els/CLSA-2026-1792933338.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "8.0p1-6.el8_4.2.tuxcare.els15"
}
]
}
],
"package": {
"name": "openssh-askpass",
"purl": "pkg:rpm/tuxcare/openssh-askpass?distro=centos-8.4",
"ecosystem": "TuxCare:CentOS:8.4"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.4els/CLSA-2026-1792933338.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "8.0p1-6.el8_4.2.tuxcare.els15"
}
]
}
],
"package": {
"name": "openssh-cavs",
"purl": "pkg:rpm/tuxcare/openssh-cavs?distro=centos-8.4",
"ecosystem": "TuxCare:CentOS:8.4"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.4els/CLSA-2026-1792933338.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "8.0p1-6.el8_4.2.tuxcare.els15"
}
]
}
],
"package": {
"name": "openssh-clients",
"purl": "pkg:rpm/tuxcare/openssh-clients?distro=centos-8.4",
"ecosystem": "TuxCare:CentOS:8.4"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.4els/CLSA-2026-1792933338.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "8.0p1-6.el8_4.2.tuxcare.els15"
}
]
}
],
"package": {
"name": "openssh-keycat",
"purl": "pkg:rpm/tuxcare/openssh-keycat?distro=centos-8.4",
"ecosystem": "TuxCare:CentOS:8.4"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.4els/CLSA-2026-1792933338.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "8.0p1-6.el8_4.2.tuxcare.els15"
}
]
}
],
"package": {
"name": "openssh-ldap",
"purl": "pkg:rpm/tuxcare/openssh-ldap?distro=centos-8.4",
"ecosystem": "TuxCare:CentOS:8.4"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.4els/CLSA-2026-1792933338.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "8.0p1-6.el8_4.2.tuxcare.els15"
}
]
}
],
"package": {
"name": "openssh-server",
"purl": "pkg:rpm/tuxcare/openssh-server?distro=centos-8.4",
"ecosystem": "TuxCare:CentOS:8.4"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.4els/CLSA-2026-1792933338.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.10.3-7.6.el8_4.1.tuxcare.els15"
}
]
}
],
"package": {
"name": "pam_ssh_agent_auth",
"purl": "pkg:rpm/tuxcare/pam_ssh_agent_auth?distro=centos-8.4",
"ecosystem": "TuxCare:CentOS:8.4"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.4els/CLSA-2026-1792933338.json"
}
}
],
"modified": "2026-10-26T09:43:21.381947076Z",
"provider": "osv",
"upstream": [
"CVE-2026-106553",
"CVE-2026-106555",
"CVE-2026-106583",
"CVE-2026-106585"
],
"references": [
"https://errata.tuxcare.com/els_os/centos8.4els/CLSA-2026-1792933338.html",
"https://nvd.nist.gov/vuln/detail/CVE-2026-106553",
"https://nvd.nist.gov/vuln/detail/CVE-2026-106555",
"https://nvd.nist.gov/vuln/detail/CVE-2026-106583",
"https://nvd.nist.gov/vuln/detail/CVE-2026-106585"
]
},
"related_cves": [
{
"value": "CVE-2026-106553",
"evidence": "/upstream"
},
{
"value": "CVE-2026-106555",
"evidence": "/upstream"
},
{
"value": "CVE-2026-106583",
"evidence": "/upstream"
},
{
"value": "CVE-2026-106585",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 449857,
"published_at": "2026-10-25T13:02:31+00:00"
}