Description
A flaw was found in sssd. When authenticating with a YubiKey, the SSSD PAM responder can crash due to a use-after-free vulnerability, where a memory pointer is incorrectly handled. A local attacker could exploit this flaw by manipulating smartcard or YubiKey contents, leading to a denial of service that disrupts authentication. This vulnerability also presents a potential for privilege escalation, although it is difficult to exploit.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat Hardened Images | — | — |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 5 | — | — |
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 | 2.13.1-1 | — |
| Debian 13 | sssd | No fix yet | — |
| Debian 12 | sssd | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | sssd | 2.12.0-1ubuntu5.3 | USN-8672-1 |
| Ubuntu 25.10 | sssd | No fix yet | — |
| Ubuntu 24.04 LTS | sssd | 2.9.4-1.1ubuntu6.7 | USN-8672-1 |
| Ubuntu 22.04 LTS | sssd | 2.6.3-1ubuntu3.8 | USN-8672-1 |
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 | 2.13.1-2.el10 | RHSA-2026:97077 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | sssd +28 | 2.13.1-2.el10 | RLSA-2026:97077 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | sssd | 2.10.2-150700.9.37.1 | SUSE-SU-2026:3401-1 |
| SLES 15 SP6 | sssd | 2.10.2-150600.3.58.1 | SUSE-SU-2026:5079-1 |
| SLES 12 SP5 | sssd | 1.16.1-7.76.1 | SUSE-SU-2026:3394-1 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | sssd | 2.10.2-160000.4.1 | SUSE-SU-2026:23132-1, SUSE-SU-2026:23110-1 |
| SLES for SAP 15 SP6 | sssd | 2.10.2-150600.3.58.1 | SUSE-SU-2026:5079-1 |
| SLES 16.0 | sssd | 2.10.2-160000.4.1 | SUSE-SU-2026:23132-1, SUSE-SU-2026:23110-1 |
| SLE Micro 6.2 | sssd | 2.10.2-160000.4.1 | SUSE-SU-2026:22999-1 |
| SLE Micro 6.1 | sssd | 2.9.5-slfo.1.1_6.1 | SUSE-SU-2026:23171-1 |
| SLE Micro 6.0 | sssd | 2.8.2-9.1 | SUSE-SU-2026:23061-1 |
| SLE Micro 5.5 | sssd | 2.5.2-150500.10.49.1 | SUSE-SU-2026:4456-1 |
| SLE Micro 5.4 | sssd | 2.5.2-150400.4.48.1 | SUSE-SU-2026:3368-1 |
| SLE Micro 5.3 | sssd | 2.5.2-150400.4.48.1 | SUSE-SU-2026:3368-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | sssd | 2.10.2-160000.4.1 | openSUSE-SU-2026:21507-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | sssd +32 | 2.9.4-1.amzn2023.0.4 | ALAS2023-2026-1984 |
| Amazon Linux 2 | sssd +33 | 1.16.5-12.amzn2.15 | ALAS2-2026-3828 |
Advisories 17
- RHSA-2026:97077 Red Hat Security Advisory: sssd security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RLSA-2026:97077 Moderate: sssd security, bug fix, and enhancement update Rocky Linux Security Advisories · Nov 13, 2026
- WID-SEC-2026-4498 System Security Services Daemon (SSSD): Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 10, 2026
- SUSE-SU-2026:5079-1 Security update for sssd SUSE / openSUSE Security Updates · Nov 3, 2026
- SUSE-SU-2026:4456-1 Security update for sssd SUSE / openSUSE Security Updates · Oct 5, 2026
- USN-8672-1 sssd vulnerability Ubuntu Security Notices (USN) · Sep 2, 2026
- SUSE-SU-2026:23171-1 Security update for sssd SUSE / openSUSE Security Updates · Aug 22, 2026
- SUSE-SU-2026:23132-1 Security update for sssd SUSE / openSUSE Security Updates · Aug 14, 2026
- SUSE-SU-2026:23110-1 Security update for sssd SUSE / openSUSE Security Updates · Aug 14, 2026
- SUSE-SU-2026:23061-1 Security update for sssd SUSE / openSUSE Security Updates · Aug 12, 2026
- SUSE-SU-2026:22999-1 Security update for sssd SUSE / openSUSE Security Updates · Aug 8, 2026
- ALAS2-2026-3828 Important: sssd security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Aug 4, 2026
- openSUSE-SU-2026:21507-1 Security update for sssd SUSE / openSUSE Security Updates · Aug 2, 2026
- SUSE-SU-2026:3401-1 Security update for sssd SUSE / openSUSE Security Updates · Jul 30, 2026
- SUSE-SU-2026:3394-1 Security update for sssd SUSE / openSUSE Security Updates · Jul 30, 2026
- SUSE-SU-2026:3368-1 Security update for sssd SUSE / openSUSE Security Updates · Jul 29, 2026
- ALAS2023-2026-1984 Important: sssd security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jul 20, 2026
References
- RHSA-2026:97077 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-12610 vdb-entry
- RHBZ#2490288 issue-tracking
- https://github.com/SSSD/sssd/issues/8796