Medium
sssd — security advisory
A flaw was found in SSSD. An unprivileged local user can repeatedly request lookups for nonexistent entries through the Name Service Switch (NSS) responder. Because the negative cache does not limit the total number of stored entries and only removes expired records when an existing key is rechecked, the cache can grow without bound. This behavior can lead to memory exhaustion, resulting in a Denial of Service (DoS) as the responder becomes unresponsive or terminates.
- Products
- sssd
- Affected versions
- 2.10.1-1, 2.10.1-2, 2.11.1-1, 2.11.1-2, 2.11.1-2.1, 2.12.0-1, 2.12.0-2, 2.12.0-3~exp0, 2.12.0-4, 2.13.1-1, 2.13.1-2, 2.13.1-3, 2.8.2-4, 2.8.2-4+deb12u1, 2.9.1-1, 2.9.1-2, 2.9.2-1, 2.9.4-1, 2.9.4-1.1, 2.9.4-1.1~exp1, 2.9.4-2, 2.9.5-1, 2.9.5-2, 2.9.5-3, 2.9.5-4, 2.9.5-5
- Fixed versions
- Not specified
- CVEs
- CVE-2026-104041
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 28 Oct 2026, 03:39 UTC · Revision 1
Source evidence
A flaw was found in SSSD. An unprivileged local user can repeatedly request lookups for nonexistent entries through the Name Service Switch (NSS) responder. Because the negative cache does not limit the total number of stored entries and only removes expired records when an existing key is rechecked, the cache can grow without bound. This behavior can lead to memory exhaustion, resulting in a Denial of Service (DoS) as the responder becomes unresponsive or terminates.
osv:DEBIAN-CVE-2026-104041
sssd
Fixed versions: Not specified
sssd
Fixed versions: Not specified
Complete source record
{
"id": "990f6e003163f21df73472f458eac59f8fef827e147c15daffae0c9ab72a92bf",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-104041",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-104041",
"summary": "A flaw was found in SSSD. An unprivileged local user can repeatedly request lookups for nonexistent entries through the Name Service Switch (NSS) responder. Because the negative cache does not limit the total number of stored entries and only removes expired records when an existing key is rechecked, the cache can grow without bound. This behavior can lead to memory exhaustion, resulting in a Denial of Service (DoS) as the responder becomes unresponsive or terminates.",
"evidence": "osv:DEBIAN-CVE-2026-104041",
"products": [
{
"name": {
"value": "sssd",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.10.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.10.1-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.11.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.11.1-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.11.1-2.1",
"evidence": "/affected/0/versions"
},
{
"value": "2.12.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.12.0-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.12.0-3~exp0",
"evidence": "/affected/0/versions"
},
{
"value": "2.12.0-4",
"evidence": "/affected/0/versions"
},
{
"value": "2.13.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.13.1-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.13.1-3",
"evidence": "/affected/0/versions"
},
{
"value": "2.8.2-4",
"evidence": "/affected/0/versions"
},
{
"value": "2.8.2-4+deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "2.9.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.9.1-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.9.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.9.4-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.9.4-1.1",
"evidence": "/affected/0/versions"
},
{
"value": "2.9.4-1.1~exp1",
"evidence": "/affected/0/versions"
},
{
"value": "2.9.4-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.9.5-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.9.5-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.9.5-3",
"evidence": "/affected/0/versions"
},
{
"value": "2.9.5-4",
"evidence": "/affected/0/versions"
},
{
"value": "2.9.5-5",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "sssd",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.10.1-2",
"evidence": "/affected/1/versions"
},
{
"value": "2.11.1-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.11.1-2",
"evidence": "/affected/1/versions"
},
{
"value": "2.11.1-2.1",
"evidence": "/affected/1/versions"
},
{
"value": "2.12.0-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.12.0-2",
"evidence": "/affected/1/versions"
},
{
"value": "2.12.0-3~exp0",
"evidence": "/affected/1/versions"
},
{
"value": "2.12.0-4",
"evidence": "/affected/1/versions"
},
{
"value": "2.13.1-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.13.1-2",
"evidence": "/affected/1/versions"
},
{
"value": "2.13.1-3",
"evidence": "/affected/1/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-104041",
"aliases": [
"DEBIAN-CVE-2026-104041"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "sssd",
"purl": "pkg:deb/debian/sssd?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2.10.1-1",
"2.10.1-2",
"2.11.1-1",
"2.11.1-2",
"2.11.1-2.1",
"2.12.0-1",
"2.12.0-2",
"2.12.0-3~exp0",
"2.12.0-4",
"2.13.1-1",
"2.13.1-2",
"2.13.1-3",
"2.8.2-4",
"2.8.2-4+deb12u1",
"2.9.1-1",
"2.9.1-2",
"2.9.2-1",
"2.9.4-1",
"2.9.4-1.1",
"2.9.4-1.1~exp1",
"2.9.4-2",
"2.9.5-1",
"2.9.5-2",
"2.9.5-3",
"2.9.5-4",
"2.9.5-5"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-104041.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "sssd",
"purl": "pkg:deb/debian/sssd?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"2.10.1-2",
"2.11.1-1",
"2.11.1-2",
"2.11.1-2.1",
"2.12.0-1",
"2.12.0-2",
"2.12.0-3~exp0",
"2.12.0-4",
"2.13.1-1",
"2.13.1-2",
"2.13.1-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-104041.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-07T09:47:27.281244808Z",
"provider": "osv",
"upstream": [
"CVE-2026-104041"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-104041"
]
},
"related_cves": [
{
"value": "CVE-2026-104041",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 94637,
"published_at": "2026-10-06T02:17:03.327+00:00"
}