Medium
sssd — security advisory
A flaw was found in SSSD (System Security Services Daemon). A local attacker with privileges to connect to the PAM (Pluggable Authentication Modules) responder socket can send a specially crafted protocol request. If the `pam_app_services` configuration is enabled and the service item is omitted from the request, a NULL pointer dereference can occur. This vulnerability leads to a denial of service, causing the PAM responder to crash and disrupt authentication services.
- 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-2026-90995
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 16:22 UTC · Revision 1
Source evidence
A flaw was found in SSSD (System Security Services Daemon). A local attacker with privileges to connect to the PAM (Pluggable Authentication Modules) responder socket can send a specially crafted protocol request. If the `pam_app_services` configuration is enabled and the service item is omitted from the request, a NULL pointer dereference can occur. This vulnerability leads to a denial of service, causing the PAM responder to crash and disrupt authentication services.
osv:DEBIAN-CVE-2026-90995
sssd
Fixed versions: Not specified
sssd
Fixed versions: Not specified
Complete source record
{
"id": "1515fa5d562c00df916511b6b05c10918a0cf83c85ec7417cb40e573f6a73a14",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-90995",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-90995",
"summary": "A flaw was found in SSSD (System Security Services Daemon). A local attacker with privileges to connect to the PAM (Pluggable Authentication Modules) responder socket can send a specially crafted protocol request. If the `pam_app_services` configuration is enabled and the service item is omitted from the request, a NULL pointer dereference can occur. This vulnerability leads to a denial of service, causing the PAM responder to crash and disrupt authentication services.",
"evidence": "osv:DEBIAN-CVE-2026-90995",
"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",
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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/0/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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"evidence": "/affected/0/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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}
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},
{
"name": {
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"prerequisites": [],
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"affected_versions": [
{
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"evidence": "/affected/1/versions"
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{
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"evidence": "/affected/1/versions"
},
{
"value": "2.11.1-2",
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},
{
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},
{
"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"
},
{
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}
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}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-90995",
"aliases": [
"DEBIAN-CVE-2026-90995"
],
"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": [
{
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],
"package": {
"name": "sssd",
"purl": "pkg:deb/debian/sssd?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
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"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-2026-90995.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": {
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},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-15T09:47:31.329826469Z",
"provider": "osv",
"upstream": [
"CVE-2026-90995"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-90995"
]
},
"related_cves": [
{
"value": "CVE-2026-90995",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 327593,
"published_at": "2026-09-14T16:17:42.367+00:00"
}