Medium
sssd — security advisory
A flaw was found in sssd. A remote attacker can cause a denial of service (DoS) by submitting a certificate that lacks an expected Security Identifier (SID) extension. In deployments configured with SID-based certificate mapping rules, the service fails to verify the presence of the extension before processing it, causing the process to crash during authentication or lookup operations.
- Products
- sssd
- Affected versions
- 1.12.5-2, 1.13.1-2, 1.13.2-1, 1.13.3-1, 1.13.4-1, 1.13.4-1ubuntu1, 1.13.4-1ubuntu1.1, 1.13.4-1ubuntu1.10, 1.13.4-1ubuntu1.11, 1.13.4-1ubuntu1.12, 1.13.4-1ubuntu1.13, 1.13.4-1ubuntu1.14, 1.13.4-1ubuntu1.15, 1.13.4-1ubuntu1.15+esm1, 1.13.4-1ubuntu1.2, 1.13.4-1ubuntu1.5, 1.13.4-1ubuntu1.6, 1.13.4-1ubuntu1.7, 1.13.4-1ubuntu1.8, 1.13.4-1ubuntu1.9, 1.15.3-2ubuntu1, 1.15.3-3ubuntu1, 1.16.0-5ubuntu1, 1.16.0-5ubuntu2, 1.16.1-1ubuntu1, 1.16.1-1ubuntu1.1, 1.16.1-1ubuntu1.2, 1.16.1-1ubuntu1.3, 1.16.1-1ubuntu1.4, 1.16.1-1ubuntu1.5, 1.16.1-1ubuntu1.6, 1.16.1-1ubuntu1.7, 1.16.1-1ubuntu1.8, 1.16.1-1ubuntu1.8+esm1, 2.10.1-2ubuntu5, 2.10.1-2ubuntu7, 2.12.0-1ubuntu3, 2.12.0-1ubuntu4, 2.12.0-1ubuntu5, 2.12.0-1ubuntu5.1, 2.12.0-1ubuntu5.2, 2.12.0-1ubuntu5.3, 2.12.0-1ubuntu5.4, 2.12.0-1ubuntu5.5, 2.12.0-4ubuntu1, 2.12.0-4ubuntu2, 2.12.0-4ubuntu3, 2.12.0-4ubuntu4, 2.2.0-4ubuntu1, 2.2.2-1, 2.2.2-1ubuntu1, 2.2.3-1.1ubuntu1, 2.2.3-2, 2.2.3-3, 2.2.3-3ubuntu0.1, 2.2.3-3ubuntu0.10, 2.2.3-3ubuntu0.11, 2.2.3-3ubuntu0.12, 2.2.3-3ubuntu0.13, 2.2.3-3ubuntu0.13+esm1, 2.2.3-3ubuntu0.2, 2.2.3-3ubuntu0.3, 2.2.3-3ubuntu0.4, 2.2.3-3ubuntu0.6, 2.2.3-3ubuntu0.7, 2.2.3-3ubuntu0.8, 2.2.3-3ubuntu0.9, 2.4.1-2ubuntu4, 2.5.2-4ubuntu1, 2.5.2-4ubuntu3, 2.5.2-4ubuntu4, 2.6.1-1ubuntu3, 2.6.3-1ubuntu3, 2.6.3-1ubuntu3.1, 2.6.3-1ubuntu3.2, 2.6.3-1ubuntu3.3, 2.6.3-1ubuntu3.4, 2.6.3-1ubuntu3.5, 2.6.3-1ubuntu3.6, 2.6.3-1ubuntu3.8, 2.6.3-1ubuntu3.9, 2.9.1-2ubuntu2, 2.9.1-2ubuntu3, 2.9.2-1ubuntu2, 2.9.4-1.1ubuntu3, 2.9.4-1.1ubuntu5, 2.9.4-1.1ubuntu6, 2.9.4-1.1ubuntu6.1, 2.9.4-1.1ubuntu6.2, 2.9.4-1.1ubuntu6.3, 2.9.4-1.1ubuntu6.4, 2.9.4-1.1ubuntu6.5, 2.9.4-1.1ubuntu6.6, 2.9.4-1.1ubuntu6.7, 2.9.4-1.1ubuntu6.8, 2.9.4-1ubuntu1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-104038
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 01:58 UTC · Revision 1
Source evidence
A flaw was found in sssd. A remote attacker can cause a denial of service (DoS) by submitting a certificate that lacks an expected Security Identifier (SID) extension. In deployments configured with SID-based certificate mapping rules, the service fails to verify the presence of the extension before processing it, causing the process to crash during authentication or lookup operations.
osv:UBUNTU-CVE-2026-104038
sssd
Fixed versions: Not specified
sssd
Fixed versions: Not specified
sssd
Fixed versions: Not specified
sssd
Fixed versions: Not specified
sssd
Fixed versions: Not specified
sssd
Fixed versions: Not specified
sssd
Fixed versions: Not specified
Complete source record
{
"id": "a9348ecc72a39855f5ebd92fe82efc83c0d6d1fb8676a524afb030b752f5611d",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-104038",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-104038",
"summary": "A flaw was found in sssd. A remote attacker can cause a denial of service (DoS) by submitting a certificate that lacks an expected Security Identifier (SID) extension. In deployments configured with SID-based certificate mapping rules, the service fails to verify the presence of the extension before processing it, causing the process to crash during authentication or lookup operations.",
"evidence": "osv:UBUNTU-CVE-2026-104038",
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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"evidence": "/affected/1/versions"
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{
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{
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{
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{
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{
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{
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{
"value": "1.16.1-1ubuntu1.4",
"evidence": "/affected/1/versions"
},
{
"value": "1.16.1-1ubuntu1.5",
"evidence": "/affected/1/versions"
},
{
"value": "1.16.1-1ubuntu1.6",
"evidence": "/affected/1/versions"
},
{
"value": "1.16.1-1ubuntu1.7",
"evidence": "/affected/1/versions"
},
{
"value": "1.16.1-1ubuntu1.8",
"evidence": "/affected/1/versions"
},
{
"value": "1.16.1-1ubuntu1.8+esm1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "sssd",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.2.0-4ubuntu1",
"evidence": "/affected/2/versions"
},
{
"value": "2.2.2-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.2.2-1ubuntu1",
"evidence": "/affected/2/versions"
},
{
"value": "2.2.3-1.1ubuntu1",
"evidence": "/affected/2/versions"
},
{
"value": "2.2.3-2",
"evidence": "/affected/2/versions"
},
{
"value": "2.2.3-3",
"evidence": "/affected/2/versions"
},
{
"value": "2.2.3-3ubuntu0.1",
"evidence": "/affected/2/versions"
},
{
"value": "2.2.3-3ubuntu0.2",
"evidence": "/affected/2/versions"
},
{
"value": "2.2.3-3ubuntu0.3",
"evidence": "/affected/2/versions"
},
{
"value": "2.2.3-3ubuntu0.4",
"evidence": "/affected/2/versions"
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{
"value": "2.2.3-3ubuntu0.6",
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},
{
"value": "2.2.3-3ubuntu0.7",
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{
"value": "2.2.3-3ubuntu0.8",
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},
{
"value": "2.2.3-3ubuntu0.9",
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},
{
"value": "2.2.3-3ubuntu0.10",
"evidence": "/affected/2/versions"
},
{
"value": "2.2.3-3ubuntu0.11",
"evidence": "/affected/2/versions"
},
{
"value": "2.2.3-3ubuntu0.12",
"evidence": "/affected/2/versions"
},
{
"value": "2.2.3-3ubuntu0.13",
"evidence": "/affected/2/versions"
},
{
"value": "2.2.3-3ubuntu0.13+esm1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "sssd",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "2.4.1-2ubuntu4",
"evidence": "/affected/3/versions"
},
{
"value": "2.5.2-4ubuntu1",
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},
{
"value": "2.5.2-4ubuntu3",
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{
"value": "2.5.2-4ubuntu4",
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},
{
"value": "2.6.1-1ubuntu3",
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},
{
"value": "2.6.3-1ubuntu3",
"evidence": "/affected/3/versions"
},
{
"value": "2.6.3-1ubuntu3.1",
"evidence": "/affected/3/versions"
},
{
"value": "2.6.3-1ubuntu3.2",
"evidence": "/affected/3/versions"
},
{
"value": "2.6.3-1ubuntu3.3",
"evidence": "/affected/3/versions"
},
{
"value": "2.6.3-1ubuntu3.4",
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},
{
"value": "2.6.3-1ubuntu3.5",
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{
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{
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{
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{
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{
"value": "2.9.2-1ubuntu2",
"evidence": "/affected/4/versions"
},
{
"value": "2.9.4-1ubuntu1",
"evidence": "/affected/4/versions"
},
{
"value": "2.9.4-1.1ubuntu3",
"evidence": "/affected/4/versions"
},
{
"value": "2.9.4-1.1ubuntu5",
"evidence": "/affected/4/versions"
},
{
"value": "2.9.4-1.1ubuntu6",
"evidence": "/affected/4/versions"
},
{
"value": "2.9.4-1.1ubuntu6.1",
"evidence": "/affected/4/versions"
},
{
"value": "2.9.4-1.1ubuntu6.2",
"evidence": "/affected/4/versions"
},
{
"value": "2.9.4-1.1ubuntu6.3",
"evidence": "/affected/4/versions"
},
{
"value": "2.9.4-1.1ubuntu6.4",
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},
{
"value": "2.9.4-1.1ubuntu6.5",
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},
{
"value": "2.9.4-1.1ubuntu6.6",
"evidence": "/affected/4/versions"
},
{
"value": "2.9.4-1.1ubuntu6.7",
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{
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{
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{
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},
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"affected_versions": [
{
"value": "2.10.1-2ubuntu5",
"evidence": "/affected/6/versions"
},
{
"value": "2.10.1-2ubuntu7",
"evidence": "/affected/6/versions"
},
{
"value": "2.12.0-1ubuntu3",
"evidence": "/affected/6/versions"
},
{
"value": "2.12.0-1ubuntu4",
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},
{
"value": "2.12.0-1ubuntu5",
"evidence": "/affected/6/versions"
},
{
"value": "2.12.0-1ubuntu5.1",
"evidence": "/affected/6/versions"
},
{
"value": "2.12.0-1ubuntu5.2",
"evidence": "/affected/6/versions"
},
{
"value": "2.12.0-1ubuntu5.3",
"evidence": "/affected/6/versions"
},
{
"value": "2.12.0-1ubuntu5.4",
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},
{
"value": "2.12.0-1ubuntu5.5",
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}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-104038",
"aliases": [
"UBUNTU-CVE-2026-104038"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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}
]
}
],
"package": {
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"purl": "pkg:deb/ubuntu/sssd?arch=source&distro=esm-infra-legacy%2Fxenial",
"ecosystem": "Ubuntu:Pro:16.04:LTS"
},
"versions": [
"1.12.5-2",
"1.13.1-2",
"1.13.2-1",
"1.13.3-1",
"1.13.4-1",
"1.13.4-1ubuntu1",
"1.13.4-1ubuntu1.1",
"1.13.4-1ubuntu1.2",
"1.13.4-1ubuntu1.5",
"1.13.4-1ubuntu1.6",
"1.13.4-1ubuntu1.7",
"1.13.4-1ubuntu1.8",
"1.13.4-1ubuntu1.9",
"1.13.4-1ubuntu1.10",
"1.13.4-1ubuntu1.11",
"1.13.4-1ubuntu1.12",
"1.13.4-1ubuntu1.13",
"1.13.4-1ubuntu1.14",
"1.13.4-1ubuntu1.15",
"1.13.4-1ubuntu1.15+esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-104038.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libipa-hbac0",
"binary_version": "1.13.4-1ubuntu1.15+esm1"
},
{
"binary_name": "libnss-sss",
"binary_version": "1.13.4-1ubuntu1.15+esm1"
},
{
"binary_name": "libpam-sss",
"binary_version": "1.13.4-1ubuntu1.15+esm1"
},
{
"binary_name": "libsss-idmap0",
"binary_version": "1.13.4-1ubuntu1.15+esm1"
},
{
"binary_name": "libsss-nss-idmap0",
"binary_version": "1.13.4-1ubuntu1.15+esm1"
},
{
"binary_name": "libsss-simpleifp0",
"binary_version": "1.13.4-1ubuntu1.15+esm1"
},
{
"binary_name": "libsss-sudo",
"binary_version": "1.13.4-1ubuntu1.15+esm1"
},
{
"binary_name": "libwbclient-sssd",
"binary_version": "1.13.4-1ubuntu1.15+esm1"
},
{
"binary_name": "python-libipa-hbac",
"binary_version": "1.13.4-1ubuntu1.15+esm1"
},
{
"binary_name": "python-libsss-nss-idmap",
"binary_version": "1.13.4-1ubuntu1.15+esm1"
},
{
"binary_name": "python-sss",
"binary_version": "1.13.4-1ubuntu1.15+esm1"
},
{
"binary_name": "python3-libipa-hbac",
"binary_version": "1.13.4-1ubuntu1.15+esm1"
},
{
"binary_name": "python3-libsss-nss-idmap",
"binary_version": "1.13.4-1ubuntu1.15+esm1"
},
{
"binary_name": "python3-sss",
"binary_version": "1.13.4-1ubuntu1.15+esm1"
},
{
"binary_name": "sssd",
"binary_version": "1.13.4-1ubuntu1.15+esm1"
},
{
"binary_name": "sssd-ad",
"binary_version": "1.13.4-1ubuntu1.15+esm1"
},
{
"binary_name": "sssd-ad-common",
"binary_version": "1.13.4-1ubuntu1.15+esm1"
},
{
"binary_name": "sssd-common",
"binary_version": "1.13.4-1ubuntu1.15+esm1"
},
{
"binary_name": "sssd-dbus",
"binary_version": "1.13.4-1ubuntu1.15+esm1"
},
{
"binary_name": "sssd-ipa",
"binary_version": "1.13.4-1ubuntu1.15+esm1"
},
{
"binary_name": "sssd-krb5",
"binary_version": "1.13.4-1ubuntu1.15+esm1"
},
{
"binary_name": "sssd-krb5-common",
"binary_version": "1.13.4-1ubuntu1.15+esm1"
},
{
"binary_name": "sssd-ldap",
"binary_version": "1.13.4-1ubuntu1.15+esm1"
},
{
"binary_name": "sssd-proxy",
"binary_version": "1.13.4-1ubuntu1.15+esm1"
},
{
"binary_name": "sssd-tools",
"binary_version": "1.13.4-1ubuntu1.15+esm1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "sssd",
"purl": "pkg:deb/ubuntu/sssd?arch=source&distro=esm-infra%2Fbionic",
"ecosystem": "Ubuntu:Pro:18.04:LTS"
},
"versions": [
"1.15.3-2ubuntu1",
"1.15.3-3ubuntu1",
"1.16.0-5ubuntu1",
"1.16.0-5ubuntu2",
"1.16.1-1ubuntu1",
"1.16.1-1ubuntu1.1",
"1.16.1-1ubuntu1.2",
"1.16.1-1ubuntu1.3",
"1.16.1-1ubuntu1.4",
"1.16.1-1ubuntu1.5",
"1.16.1-1ubuntu1.6",
"1.16.1-1ubuntu1.7",
"1.16.1-1ubuntu1.8",
"1.16.1-1ubuntu1.8+esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-104038.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libipa-hbac0",
"binary_version": "1.16.1-1ubuntu1.8+esm1"
},
{
"binary_name": "libnss-sss",
"binary_version": "1.16.1-1ubuntu1.8+esm1"
},
{
"binary_name": "libpam-sss",
"binary_version": "1.16.1-1ubuntu1.8+esm1"
},
{
"binary_name": "libsss-certmap0",
"binary_version": "1.16.1-1ubuntu1.8+esm1"
},
{
"binary_name": "libsss-idmap0",
"binary_version": "1.16.1-1ubuntu1.8+esm1"
},
{
"binary_name": "libsss-nss-idmap0",
"binary_version": "1.16.1-1ubuntu1.8+esm1"
},
{
"binary_name": "libsss-simpleifp0",
"binary_version": "1.16.1-1ubuntu1.8+esm1"
},
{
"binary_name": "libsss-sudo",
"binary_version": "1.16.1-1ubuntu1.8+esm1"
},
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],
"modified": "2026-10-17T12:57:59.208693004Z",
"provider": "osv",
"upstream": [
"CVE-2026-104038"
],
"references": [
"https://ubuntu.com/security/CVE-2026-104038",
"https://www.cve.org/CVERecord?id=CVE-2026-104038",
"https://bugzilla.redhat.com/show_bug.cgi?id=2478980",
"https://access.redhat.com/security/cve/CVE-2026-104038"
]
},
"related_cves": [
{
"value": "CVE-2026-104038",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 357815,
"published_at": "2026-10-06T01:16:00+00:00"
}