CVE-2025-11561
Full vulnerability record from the local CVENow database.
Description
A flaw was found in the integration of Active Directory and the System Security Services Daemon (SSSD) on Linux systems. In default configurations, the Kerberos local authentication plugin (sssd_krb5_localauth_plugin) is enabled, but a fallback to the an2ln plugin is possible. This fallback allows an attacker with permission to modify certain AD attributes (such as userPrincipalName or samAccountName) to impersonate privileged users, potentially resulting in unauthorized access or privilege escalation on domain-joined Linux hosts.
Severity
HIGH
CVSS score
8.8
(v3.1)
Vulnerability status
Deferred
Source identifier
Published
2025-10-09 14:15:54.447000
Last modified
2026-11-04 22:17:26.980000
View original CVE JSON
{
"id": "CVE-2025-11561",
"sourceIdentifier": "[email protected]",
"published": "2025-10-09T14:15:54.447",
"lastModified": "2026-11-04T22:17:26.980",
"vulnStatus": "Deferred",
"cveTags": [],
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{
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"value": "A flaw was found in the integration of Active Directory and the System Security Services Daemon (SSSD) on Linux systems. In default configurations, the Kerberos local authentication plugin (sssd_krb5_localauth_plugin) is enabled, but a fallback to the an2ln plugin is possible. This fallback allows an attacker with permission to modify certain AD attributes (such as userPrincipalName or samAccountName) to impersonate privileged users, potentially resulting in unauthorized access or privilege escalation on domain-joined Linux hosts."
}
],
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{
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"description": [
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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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{
"url": "https://access.redhat.com/errata/RHSA-2026:0677",
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{
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{
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{
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{
"url": "https://github.com/SSSD/sssd/issues/8021",
"source": "[email protected]"
}
]
}