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Fencer Vulns
medium 6.4

CVE-2026-12610 json

Sssd: use-after-free crash in sssd' 'sssd_pam' process

published 2026-06-30 4 mo ago modified 2026-11-06 3 d ago also EUVD-2026-40268

cvss
6.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 1%
public exploits
0
none known

Summary

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.

Patch / fix

  • sssd Debian 14 2.13.1-1

debian advisories DEBIAN-CVE-2026-12610

  • sssd Ubuntu 22.04 LTS 2.6.3-1ubuntu3.8
  • sssd Ubuntu 24.04 LTS 2.9.4-1.1ubuntu6.7
  • sssd Ubuntu 26.04 LTS 2.12.0-1ubuntu5.3

ubuntu advisories UBUNTU-CVE-2026-12610

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • sssd SLE Micro 5.5 2.5.2-150500.10.49.1
  • sssd Linux Micro 6.0 2.8.2-9.1
  • sssd Linux Micro 6.1 2.9.5-slfo.1.1_6.1
  • sssd SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 2.10.2-160000.4.1
  • sssd SLE Module for Basesystem 15 SP7 2.10.2-150700.9.37.1
  • sssd SLE Micro 5.4, SLE Micro 5.3 2.5.2-150400.4.48.1
  • sssd SLES for SAP 15 SP6, SLES 15 SP6-LTSS 2.10.2-150600.3.58.1
  • sssd SLES LTSS Extended Security 12 SP5 1.16.1-7.76.1

suse advisories SUSE-SU-2026:5079-1SUSE-SU-2026:4456-1SUSE-SU-2026:23061-1SUSE-SU-2026:23171-1SUSE-SU-2026:22999-1SUSE-SU-2026:23110-1

  • sssd openSUSE Leap 16.0 2.10.2-160000.4.1

opensuse advisories openSUSE-SU-2026:21507-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-12610 updated cvss 6.4

sssd: Use-after-free crash in SSSD' 'sssd_pam' process

  • Red Hat Enterprise Linux 6 pam, sssd, sssd-ad, sssd-ipa, sssd-dbus, sssd-krb5, +20 more Red Hat Enterprise Linux 7 pam, sssd, sssd-ad, sssd-ipa, sssd-kcm, sssd-dbus, +25 more
    affected: workaround, no fix available, no fix planned “Configure the sssd systemd service to automatically restart on failure. This ensures authentication remains available even if an attacker triggers the denial-of-service crash.”
  • Red Hat Enterprise Linux 8 pam, sssd, sssd-ad, sssd-idp, sssd-ipa, sssd-kcm, +25 more Red Hat Enterprise Linux 9 pam, sssd, sssd-ad, sssd-idp, sssd-ipa, sssd-kcm, +25 more Red Hat Enterprise Linux 10 pam, sssd Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9 Red Hat OpenShift Container Platform 5 openshift/ose-rhel-coreos-9
    affected: workaround, no fix available “Configure the sssd systemd service to automatically restart on failure. This ensures authentication remains available even if an attacker triggers the denial-of-service crash.”
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-dashboard-rhel9
    under investigation
  • Red Hat Hardened Images pam
    not affected: component not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
4 mo ago

Exploit prediction

0.12% chance of exploitation in the next 30 days, higher than 1% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.4 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

  • 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

Classification

Weakness
  • CWE-825 Expired Pointer Dereference

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.