Vulnerability · Published Jun 30, 2026 · Assigned by redhat
CVE-2026-12610Sssd: use-after-free crash in sssd' 'sssd_pam' process
Medium 6.4
In plain English
A medium-severity security flaw in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | sssd | no fix listed | DEBIAN-CVE-2026-12610 |
| Debian:13 | sssd | no fix listed | DEBIAN-CVE-2026-12610 |
| Ubuntu:22.04:LTS | sssd | 2.6.3-1ubuntu3.8 | USN-8672-1 |
| Ubuntu:22.04:LTS | sssd | 2.6.3-1ubuntu3.8 | UBUNTU-CVE-2026-12610 |
| Ubuntu:24.04:LTS | sssd | 2.9.4-1.1ubuntu6.7 | USN-8672-1 |
| Ubuntu:24.04:LTS | sssd | 2.9.4-1.1ubuntu6.7 | UBUNTU-CVE-2026-12610 |
| Ubuntu:25.10 | sssd | no fix listed | UBUNTU-CVE-2026-12610 |
| Ubuntu:26.04:LTS | sssd | 2.12.0-1ubuntu5.3 | UBUNTU-CVE-2026-12610 |
| Ubuntu:26.04:LTS | sssd | 2.12.0-1ubuntu5.3 | USN-8672-1 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 6 | see references |
| Red Hat | Red Hat Enterprise Linux 6 | see references |
| Red Hat | Red Hat Enterprise Linux 7 | see references |
| Red Hat | Red Hat Enterprise Linux 7 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
| Red Hat | Red Hat Hardened Images | see references |
| Red Hat | Red Hat OpenShift Container Platform 4 | see references |
| Red Hat | Red Hat OpenShift Container Platform 4 | see references |
| Red Hat | Red Hat OpenShift Container Platform 5 | see references |
Weakness: CWE-825 · Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
References
- https://access.redhat.com/security/cve/CVE-2026-12610 vdb-entry, x_refsource_REDHAT
- RHBZ#2490288 issue-tracking, x_refsource_REDHAT
- https://github.com/SSSD/sssd/issues/8796