CVE-2026-14476

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.

Affected Software

VendorProductVersion RangeStatus
Red HatRed Hat Enterprise Linux 100:2.12.0-3.el10_2.1 < *unaffected
Red HatRed Hat Enterprise Linux 10.0 Extended Update Support0:2.10.2-3.el10_0.5 < *unaffected
Red HatRed Hat Enterprise Linux 7 Extended Lifecycle Support0:1.16.5-10.el7_9.18 < *unaffected
Red HatRed Hat Enterprise Linux 80:2.9.4-5.el8_10.5 < *unaffected
Red HatRed Hat Enterprise Linux 80:2.9.4-5.el8_10.5 < *unaffected
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support0:2.4.0-9.el8_4.5 < *unaffected
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On0:2.4.0-9.el8_4.5 < *unaffected
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support0:2.6.2-4.el8_6.5 < *unaffected
Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On0:2.6.2-4.el8_6.5 < *unaffected
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Service0:2.8.2-4.el8_8.4 < *unaffected
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutions0:2.8.2-4.el8_8.4 < *unaffected
Red HatRed Hat Enterprise Linux 90:2.9.8-4.el9_8.1 < *unaffected
Red HatRed Hat Enterprise Linux 90:2.9.8-4.el9_8.1 < *unaffected
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutions0:2.8.2-5.el9_2.7 < *unaffected
Red HatRed Hat Enterprise Linux 9.4 Update Services for SAP Solutions0:2.9.4-6.el9_4.5 < *unaffected
Red HatRed Hat Enterprise Linux 9.6 Extended Update Support0:2.9.6-4.el9_6.5 < *unaffected
Red HatRed Hat OpenShift Container Platform 4.13413.92.202608111330-0 < *unaffected
Red HatRed Hat OpenShift Container Platform 4.194.19.9.6.202608120446-0 < *unaffected
Red HatRed Hat OpenShift Container Platform 4.204.20.9.6.202608121719-0 < *unaffected
Red HatRed Hat OpenShift Container Platform 4.214.21.9.6.202608122143-0 < *unaffected
Red HatRed Hat OpenShift Container Platform 4.224.22.9.8.202608130832-0 < *unaffected

Weaknesses

  • CWE-23: Relative Path Traversal

Workarounds

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.

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

References