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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | sssd | ≤ 2.11.1 | — |
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 8.2 Advanced Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | — | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Telecommunications Update Service | — | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions | — | — |
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | — | — |
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions | — | — |
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | — | — |
| Red Hat | Red Hat Enterprise Linux 9.4 Extended Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.12 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.13 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.14 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.15 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.16 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.17 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.18 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.19 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4.20 | — | — |
| Red Hat | Red Hat Ceph Storage 7 | — | — |
| Red Hat | Red Hat Ceph Storage 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | sssd | 2.12.0-1 | — |
| Debian 13 | sssd | No fix yet | — |
| Debian 12 | sssd | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.10 | sssd | No fix yet | — |
| Ubuntu 24.04 LTS | sssd | No fix yet | — |
| Ubuntu 22.04 LTS | sssd | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | sssd | No fix yet | — |
| Ubuntu Pro 18.04 LTS | sssd | No fix yet | — |
| Ubuntu Pro 16.04 LTS | sssd | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | sssd +28 | 2.10.2-3.el10_0.3 | RHSA-2025:21020, RHSA-2025:19851 |
| RHEL 9 | sssd +30 | 2.9.7-4.el9_7.1 | RHSA-2025:20954 |
| RHEL 8 | sssd +29 | 2.9.4-5.el8_10.3 | RHSA-2025:19610 |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.6 EUS | sssd +30 | 2.9.6-4.el9_6.3 | RHSA-2025:21067 |
| RHEL 9.4 EUS | sssd +30 | 2.9.4-6.el9_4.4 | RHSA-2025:19852 |
| RHEL 9.2 E4S | sssd +28 | 2.8.2-5.el9_2.6 | RHSA-2025:19854 |
| RHEL 9.0 E4S | sssd +27 | 2.6.2-4.el9_0.4 | RHSA-2025:19850 |
| RHEL 8.8 TUS | sssd +28 | 2.8.2-4.el8_8.3 | RHSA-2025:19853 |
| RHEL 8.8 E4S | sssd +28 | 2.8.2-4.el8_8.3 | RHSA-2025:19853 |
| RHEL 8.6 TUS | sssd +27 | 2.6.2-4.el8_6.4 | RHSA-2025:19849 |
| RHEL 8.6 E4S | sssd +27 | 2.6.2-4.el8_6.4 | RHSA-2025:19849 |
| RHEL 8.6 AUS | sssd +27 | 2.6.2-4.el8_6.4 | RHSA-2025:19849 |
| RHEL 8.4 EUS Long Life | sssd +28 | 2.4.0-9.el8_4.4 | RHSA-2025:19848 |
| RHEL 8.4 AUS | sssd +28 | 2.4.0-9.el8_4.4 | RHSA-2025:19848 |
| RHEL 8.2 AUS | sssd +28 | 2.2.3-20.el8_2.3 | RHSA-2025:19859 |
| RHEL 7 ELS | sssd +33 | 1.16.5-10.el7_9.17 | RHSA-2025:19847 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | python3-sssdconfig | 2.11.1-2.el10_1.1 | ALSA-2025:21020 |
| AlmaLinux 9 | sssd +30 | 2.9.7-4.el9_7.1 | ALSA-2025:20954 |
| AlmaLinux 8 | sssd +29 | 2.9.4-5.el8_10.3 | ALSA-2025:19610 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | sssd | 2.11.1-2.el10_1.1 | RLSA-2025:21020 |
| Rocky Linux 9 | sssd | 2.9.7-4.el9_7.1 | RLSA-2025:20954 |
| Rocky Linux 8 | sssd | 2.9.4-5.el8_10.3 | RLSA-2025:19610 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | sssd | 2.9.3-150700.9.9.1 | SUSE-SU-2025:4183-1 |
| SLES 15 SP6 | sssd | 2.9.3-150600.3.28.1 | SUSE-SU-2025:4247-1 |
| SLES 15 SP5 | sssd | 2.5.2-150500.10.39.1 | SUSE-SU-2025:4182-1 |
| SLES 15 SP4 | sssd | 2.5.2-150400.4.40.1 | SUSE-SU-2025:4181-1 |
| SLES 15 SP3 | sssd | 1.16.1-150300.23.56.1 | SUSE-SU-2025:4231-1 |
Show 19 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | sssd | 1.16.1-7.68.1 | SUSE-SU-2025:4232-1 |
| SLES for SAP 16.0 | sssd | 2.9.5-160000.3.1 | SUSE-SU-2026:20019-1 |
| SLES for SAP 15 SP5 | sssd | 2.5.2-150500.10.39.1 | SUSE-SU-2025:4182-1 |
| SLES for SAP 15 SP4 | sssd | 2.5.2-150400.4.40.1 | SUSE-SU-2025:4181-1 |
| SLES for SAP 15 SP3 | sssd | 1.16.1-150300.23.56.1 | SUSE-SU-2025:4231-1 |
| SLES 16.0 | sssd | 2.9.5-160000.3.1 | SUSE-SU-2026:20019-1 |
| SLE Micro 6.2 | sssd | 2.9.5-160000.3.1 | SUSE-SU-2026:20014-1 |
| SLE Micro 6.1 | sssd | 2.9.5-slfo.1.1_4.1 | SUSE-SU-2025:21066-1 |
| SLE Micro 6.0 | sssd | 2.8.2-7.1 | SUSE-SU-2025:21084-1 |
| SLE Micro 5.5 | sssd | 2.5.2-150500.10.39.1 | SUSE-SU-2025:4182-1 |
| SLE Micro 5.4 | sssd | 2.5.2-150400.4.40.1 | SUSE-SU-2025:4181-1 |
| SLE Micro 5.3 | sssd | 2.5.2-150400.4.40.1 | SUSE-SU-2025:4181-1 |
| SLE Micro 5.2 | sssd | 1.16.1-150300.23.56.1 | SUSE-SU-2025:4231-1 |
| SLE HPC 15 SP5 | sssd | 2.5.2-150500.10.39.1 | SUSE-SU-2025:4182-1 |
| SLE HPC 15 SP4 | sssd | 2.5.2-150400.4.40.1 | SUSE-SU-2025:4181-1 |
| SLE HPC 15 SP3 | sssd | 1.16.1-150300.23.56.1 | SUSE-SU-2025:4231-1 |
| SUSE Manager Server LTS 4.3 | sssd | 2.5.2-150400.4.40.1 | SUSE-SU-2025:4181-1 |
| SUSE Manager Proxy LTS 4.3 | sssd | 2.5.2-150400.4.40.1 | SUSE-SU-2025:4181-1 |
| SUSE Enterprise Storage 7.1 | sssd | 1.16.1-150300.23.56.1 | SUSE-SU-2025:4231-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | sssd | 2.11.1-2.1 | openSUSE-SU-2025:15751-1 |
| openSUSE Leap 16.0 | sssd | 2.9.5-160000.3.1 | openSUSE-SU-2026:20001-1 |
| openSUSE Leap 15.6 | sssd | 2.9.3-150600.3.28.1 | SUSE-SU-2025:4247-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | sssd +32 | 2.9.4-1.amzn2023.0.3 | ALAS2023-2025-1249 |
| Amazon Linux 2 | sssd +33 | 1.16.5-11.amzn2.15 | ALAS2-2025-3050 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | sssd +28 | 2.10.2-3.0.1.el10_0.3 | ELSA-2025-21020, ELSA-2025-19851 |
| Oracle Linux 9 | sssd +30 | 2.9.7-4.0.1.el9_7.1 | ELSA-2025-20954 |
| Oracle Linux 8 | sssd +29 | 2.9.4-5.0.2.el8_10.3 | ELSA-2025-19610 |
| Oracle Linux 7 | sssd +33 | 1.16.5-10.0.5.el7_9.16 | ELSA-2025-19847 |
Advisories 41
- ALSA-2025:20954 Important: sssd security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:21020 Important: sssd security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:19610 Important: sssd security update AlmaLinux Security Advisories · Oct 29, 2026
- WID-SEC-2026-0349 Dell Avamar und NetWorker: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 17, 2026
- RHSA-2025:21067 Red Hat Security Advisory: sssd security update Red Hat Security Advisories (RHSA) · Sep 1, 2026
- RHSA-2025:21020 Red Hat Security Advisory: sssd security update Red Hat Security Advisories (RHSA) · Sep 1, 2026
- RHSA-2025:20954 Red Hat Security Advisory: sssd security update Red Hat Security Advisories (RHSA) · Sep 1, 2026
- RHSA-2025:19859 Red Hat Security Advisory: sssd security update Red Hat Security Advisories (RHSA) · Sep 1, 2026
- RHSA-2025:19854 Red Hat Security Advisory: sssd security update Red Hat Security Advisories (RHSA) · Sep 1, 2026
- RHSA-2025:19853 Red Hat Security Advisory: sssd security update Red Hat Security Advisories (RHSA) · Sep 1, 2026
- RHSA-2025:19852 Red Hat Security Advisory: sssd security update Red Hat Security Advisories (RHSA) · Sep 1, 2026
- RHSA-2025:19850 Red Hat Security Advisory: sssd security update Red Hat Security Advisories (RHSA) · Sep 1, 2026
- RHSA-2025:19851 Red Hat Security Advisory: sssd security update Red Hat Security Advisories (RHSA) · Sep 1, 2026
- RHSA-2025:19849 Red Hat Security Advisory: sssd security update Red Hat Security Advisories (RHSA) · Sep 1, 2026
- RHSA-2025:19847 Red Hat Security Advisory: sssd security update Red Hat Security Advisories (RHSA) · Sep 1, 2026
- RHSA-2025:19848 Red Hat Security Advisory: sssd security update Red Hat Security Advisories (RHSA) · Sep 1, 2026
- RHSA-2025:19610 Red Hat Security Advisory: sssd security update Red Hat Security Advisories (RHSA) · Sep 1, 2026
- WID-SEC-2025-2488 Red Hat Enterprise Linux (SSSD, libsoup): Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 31, 2026
- openSUSE-SU-2026:20001-1 Security update for sssd SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15751-1 libipa_hbac-devel-2.11.1-2.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20014-1 Security update for sssd SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20019-1 Security update for sssd SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:4232-1 Security update for sssd SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:21066-1 Security update for sssd SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:21084-1 Security update for sssd SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:4231-1 Security update for sssd SUSE / openSUSE Security Updates · Mar 23, 2026
- WID-SEC-2026-0389 IBM Power Hardware Management Console: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 10, 2026
- SUSE-SU-2025:4182-1 Security update for sssd SUSE / openSUSE Security Updates · Feb 5, 2026
- SUSE-SU-2025:4181-1 Security update for sssd SUSE / openSUSE Security Updates · Feb 5, 2026
- SUSE-SU-2025:4183-1 Security update for sssd SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:4247-1 Security update for sssd SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2025-19847 Important: sssd security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Dec 5, 2025
- ELSA-2025-21020 Important: sssd security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Dec 2, 2025
- ELSA-2025-20954 Important: sssd security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Nov 25, 2025
- RLSA-2025:20954 Important: sssd security update Rocky Linux Security Advisories · Nov 21, 2025
- RLSA-2025:21020 Important: sssd security update Rocky Linux Security Advisories · Nov 21, 2025
- ELSA-2025-19851 Important: sssd security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Nov 6, 2025
- RLSA-2025:19610 Important: sssd security update Rocky Linux Security Advisories · Nov 5, 2025
- ELSA-2025-19610 Important: sssd security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 4, 2025
- ALAS2-2025-3050 Important: sssd security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Oct 27, 2025
- ALAS2023-2025-1249 Important: sssd security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 27, 2025
References
- RHSA-2025:19610 vendor-advisory
- RHSA-2025:19847 vendor-advisory
- RHSA-2025:19848 vendor-advisory
- RHSA-2025:19849 vendor-advisory
- RHSA-2025:19850 vendor-advisory
- RHSA-2025:19851 vendor-advisory
- RHSA-2025:19852 vendor-advisory
- RHSA-2025:19853 vendor-advisory
- RHSA-2025:19854 vendor-advisory
- RHSA-2025:19859 vendor-advisory
- RHSA-2025:20954 vendor-advisory
- RHSA-2025:21020 vendor-advisory
- RHSA-2025:21067 vendor-advisory
- RHSA-2025:21329 vendor-advisory
- RHSA-2025:21795 vendor-advisory
- RHSA-2025:22256 vendor-advisory
- RHSA-2025:22265 vendor-advisory
- RHSA-2025:22277 vendor-advisory
- RHSA-2025:22529 vendor-advisory
- RHSA-2025:22548 vendor-advisory
- RHSA-2025:22724 vendor-advisory
- RHSA-2025:23113 vendor-advisory
- RHSA-2026:0316 vendor-advisory
- RHSA-2026:0677 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2025-11561 vdb-entry
- https://blog.async.sg/kerberos-ldr
- RHBZ#2402727 issue-tracking
- https://github.com/SSSD/sssd/issues/8021