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Advisory severityHigh8.0Vendor: MediumRed Hat Linux

High [CVE-2026-14476] GPO cache path traversal via unsanitized gPCFileSysPath allows Kerberos authentication bypass

This high-severity Red Hat Linux advisory covers CVE-2026-14476 affecting Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-14476 Source published Source updated

VulniPulse record published Record updated

CVE-2026-14476
Affected products & platforms
Red Hat LinuxRed Hat Enterprise Linux
Open source advisory

Summary

A path traversal flaw was found in SSSD's AD GPO provider. The ad_gpo_extract_smb_components() function does not sanitize.. sequences in the gPCFileSysPath LDAP attribute, allowing an attacker with AD GPO management access to write files outside the GPO cache directory as root.

On default RHEL configurations with SELinux enforcing, this can be used to inject Kerberos configuration leading to authentication bypass. SELinux blocks writes to most security-critical paths such as /etc/cron.d/.

Red Hat severity: Moderate — CVSS 8 (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H). Weakness: CWE-23.

Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; and 20 more.

Affected products named by the advisory: Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.8 Telecommunications Update Service; Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions; and 16 more.

Is CVE-2026-14476 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-14476 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-14476?

Upgrade to a fixed release named by Red Hat:

  • sssd-0:2.12.0-3.el10_2.1
  • sssd-0:2.10.2-3.el10_0.5
  • sssd-0:1.16.5-10.el7_9.18
  • sssd-0:2.9.4-5.el8_10.5
  • sssd-0:2.4.0-9.el8_4.5
  • sssd-0:2.6.2-4.el8_6.5
  • sssd-0:2.8.2-4.el8_8.4
  • sssd-0:2.9.8-4.el9_8.1
  • sssd-0:2.8.2-5.el9_2.7
  • sssd-0:2.9.4-6.el9_4.5
  • sssd-0:2.9.6-4.el9_6.5
  • openshift/ose-rhel-coreos-8:412.86.202608241157-0

30 more fixed releases are listed below.

Confirm against the vendor advisory before you patch.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.

Official advisory · high-confidence parse· fetched 11 days ago·verify at source

Fixed versions
  • sssd-0:2.12.0-3.el10_2.1
  • sssd-0:2.10.2-3.el10_0.5
  • sssd-0:1.16.5-10.el7_9.18
  • sssd-0:2.9.4-5.el8_10.5
  • sssd-0:2.4.0-9.el8_4.5
  • sssd-0:2.6.2-4.el8_6.5
  • sssd-0:2.8.2-4.el8_8.4
  • sssd-0:2.9.8-4.el9_8.1
  • sssd-0:2.8.2-5.el9_2.7
  • sssd-0:2.9.4-6.el9_4.5
  • sssd-0:2.9.6-4.el9_6.5
  • openshift/ose-rhel-coreos-8:412.86.202608241157-0
  • openshift/ose-rhel-coreos-9:413.92.202608111330-0
  • openshift/ose-rhel-coreos-9:414.92.202608172040-0
  • openshift/ose-rhel-coreos-9:415.92.202608180329-0
  • openshift/ose-rhel-coreos-9:416.94.202608150307-0
  • openshift/ose-rhel-coreos-9:417.94.202608250221-0
  • openshift/ose-rhel-coreos-9:418.94.202608142238-0
  • openshift/ose-rhel-coreos-9:4.19.9.6.202608120446-0
  • openshift/ose-rhel-coreos-9:4.20.9.6.202608121719-0
  • openshift/ose-rhel-coreos-9:4.21.9.6.202608122143-0
  • openshift/ose-rhel-coreos-9:4.22.9.8.202608130832-0
  • RHSA-2026:41937
  • RHSA-2026:46482
  • RHSA-2026:50109
  • RHSA-2026:46990
  • RHSA-2026:49841
  • RHSA-2026:49844
  • RHSA-2026:49842
  • RHSA-2026:42122
  • RHSA-2026:49843
  • RHSA-2026:49840
  • RHSA-2026:49839
  • RHSA-2026:59831
  • RHSA-2026:54187
  • RHSA-2026:56786
  • RHSA-2026:56911
  • RHSA-2026:56853
  • RHSA-2026:60019
  • RHSA-2026:57483
  • RHSA-2026:54553
  • RHSA-2026:54581

Official advisory · high-confidence parse· fetched 11 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Set ad_gpo_access_control = disabled in /etc/sssd/sssd.conf to disable GPO fetching entirely. Note that this removes GPO-based login policy enforcement.

Official advisory · high-confidence parse· fetched 11 days ago·verify at source

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