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Vulnerabilities

Vulnerability · CVE-2025-11561

A flaw was found in the integration of Active Directory and the System Security Services Daemon (SSSD) on Linux systems.

Published Oct 9, 2025 · catalog updated Aug 31, 2026 · Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support

Check this week

CVE-2025-11561 is not in CISA KEV. FIRST estimates a 80.00% chance of exploitation in the next 30 days. Check whether you run Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
80.00%
Remediation
Vendor / distro source
Affected products
vendor Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support patch: 0:2.2.3-20.el8_2.3

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support patch: 0:2.2.3-20.el8_2.3patch: 0:2.2.3-20.el8_2.3

How to fix CVE-2025-11561

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2025-11561 is not in CISA KEV. FIRST estimates a 80.00% chance of exploitation in the next 30 days. Check whether you run Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support.

Which versions are affected?

Compare what you have installed with Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support patch: 0:2.2.3-20.el8_2.3 patch: 0:2.2.3-20.el8_2.3. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 80.00%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 9, 2025 · EUVD

    Detected

    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 samAccountN

  2. Aug 31, 2026 · EUVD

    Updated

    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 samAccountN

Sources

  • CVE.orgVulnerability recordCVE-2025-11561

    Official CVE identifier

    cve.org
  • EUVDVulnerability recordEUVD-2025-33347

    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. Th

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Aug 31, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.