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9.6 Critical

CVE-2026-11861 Freeipa: idm: ipa: freeipa: obtaining tgs with impersonating cname through trust relationships

Description

A flaw was found in FreeIPA. When a trust relationship is configured between FreeIPA and Active Directory, Active Directory users can bypass authentication for FreeIPA services, including the portal, SMB server, and LDAP directory. This is possible by impersonating a client name in the Ticket Granting Service (TGS) due to FreeIPA services not verifying Privilege Attribute Certificate (PAC) certificates. This vulnerability could allow an authenticated Active Directory user to escalate their privileges within the FreeIPA domain.

CVSS 3.1 detail

Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Exploitable remotely over the network, with an ordinary account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector
Network
Attack complexity
Low
Privileges required
Low
Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None

Affected products and versions

Product Affected versions Fixed in
Red Hat Enterprise Linux 10 Versions not published
Red Hat Enterprise Linux 6 Versions not published
Red Hat Enterprise Linux 7 Versions not published
Red Hat Enterprise Linux 8 8100020261007070536.823393 earliest → < 8100020261007070536.823393f5 8100020261007070536.823393f5
Red Hat Enterprise Linux 9 Versions not published
Red Hat Enterprise Linux 10.0 Extended Update Support Versions not published
Red Hat Enterprise Linux 9.6 Extended Update Support Versions not published
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Versions not published
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Versions not published
Show the 7 other branches
Product Affected versions Fixed in
Red Hat Enterprise Linux 8.8 Telecommunications Update Service 8080020261007071832 earliest → < 8080020261007071832.b0a6ceea 8080020261007071832.b0a6ceea
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 8080020261007071832 earliest → < 8080020261007071832.b0a6ceea 8080020261007071832.b0a6ceea
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 8060020261008133528 earliest → < 8060020261008133528.ada582f1 8060020261008133528.ada582f1
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 8060020261008133528 earliest → < 8060020261008133528.ada582f1 8060020261008133528.ada582f1
Red Hat Enterprise Linux 7 Extended Lifecycle Support Versions not published
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 8040020261027121355.5 earliest → < 8040020261027121355.5b01ab7e 8040020261027121355.5b01ab7e
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 8040020261027121355.5 earliest → < 8040020261027121355.5b01ab7e 8040020261027121355.5b01ab7e

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