Skip to content
Fencer Intel
medium 5.5

CVE-2026-6245 json

Sssd: out-of-bounds read in the sssd

published 6mo ago modified yesterday also EUVD-2026-23032

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 5%
public exploits
0
none known

Summary

A flaw was found in the System Security Services Daemon (SSSD). The pam_passkey_child_read_data() function within the PAM passkey responder fails to properly handle raw bytes received from a pipe. Because the data is treated as a NUL-terminated C string without explicit termination, it results in an out-of-bounds read when processed by functions like snprintf(). A local attacker could potentially trigger this vulnerability by initiating a crafted passkey authentication request, causing the SSSD PAM responder to crash, resulting in a local Denial of Service (DoS).

Patch / fix

  • Red Hat Red Hat Enterprise Linux 10 0:2.13.1-2.el10
  • Red Hat Red Hat Enterprise Linux 9 0:2.9.9-3.el9
  • sssd Debian 14 2.13.1-1

debian advisories DEBIAN-CVE-2026-6245

  • sssd Ubuntu 24.04 LTS 2.9.4-1.1ubuntu6.5
  • sssd Ubuntu 25.10 2.10.1-2ubuntu5.2
  • sssd Ubuntu 26.04 LTS 2.12.0-1ubuntu5.1

ubuntu advisories UBUNTU-CVE-2026-6245

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 openSUSE Tumbleweed 2.13.0-1.1

opensuse advisories openSUSE-SU-2026:10659-1

Is CVE-2026-6245 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

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-2026-6245 updated cvss 5.5

sssd: out-of-bounds read in the sssd

  • Red Hat Enterprise Linux 6 sssd, sssd-ad, sssd-ipa, sssd-dbus, sssd-krb5, sssd-ldap, +19 more Red Hat Enterprise Linux 7 sssd, sssd-ad, sssd-ipa, sssd-kcm, sssd-dbus, sssd-krb5, +24 more Red Hat Enterprise Linux 8 sssd, sssd-ad, sssd-idp, sssd-ipa, sssd-kcm, sssd-dbus, +24 more Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Enterprise Linux AppStream (v. 9) sssd-idp 2.9.9-3.el9
    fixed: vendor fix RHSA-2026:97438
  • Red Hat Enterprise Linux AppStream (v. 10) sssd-idp 2.13.1-2.el10
    fixed: vendor fix RHSA-2026:97077
  • Red Hat Enterprise Linux BaseOS (v. 9) sssd 2.9.9-3.el9, sssd-ad 2.9.9-3.el9, sssd-ipa 2.9.9-3.el9, sssd-kcm 2.9.9-3.el9, sssd-dbus 2.9.9-3.el9, sssd-krb5 2.9.9-3.el9, +23 more
    fixed: vendor fix RHSA-2026:97438
  • Red Hat Enterprise Linux BaseOS (v. 10) sssd 2.13.1-2.el10, sssd-ad 2.13.1-2.el10, sssd-ipa 2.13.1-2.el10, sssd-kcm 2.13.1-2.el10, sssd-dbus 2.13.1-2.el10, sssd-krb5 2.13.1-2.el10, +21 more
    fixed: vendor fix RHSA-2026:97077
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) sssd-debuginfo 2.9.9-3.el9, sssd-debugsource 2.9.9-3.el9, sssd-ad-debuginfo 2.9.9-3.el9, libsss_idmap-devel 2.9.9-3.el9, sssd-idp-debuginfo 2.9.9-3.el9, sssd-ipa-debuginfo 2.9.9-3.el9, +26 more
    fixed: vendor fix RHSA-2026:97438
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) sssd-debuginfo 2.13.1-2.el10, sssd-debugsource 2.13.1-2.el10, sssd-ad-debuginfo 2.13.1-2.el10, sssd-idp-debuginfo 2.13.1-2.el10, sssd-ipa-debuginfo 2.13.1-2.el10, sssd-kcm-debuginfo 2.13.1-2.el10, +23 more
    fixed: vendor fix RHSA-2026:97077

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
partial
Assessed
6mo ago

Exploit prediction

0.16% chance of exploitation in the next 30 days, higher than 5% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 9
  • 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 OpenShift Container Platform 4

Classification

Weakness
  • CWE-805 Buffer Access with Incorrect Length Value

References

Sources

Fencer Intel 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.