telnetd in GNU inetutils through 2.7 allows privilege escalation that can be exploited by abusing systemd service credentials support added to the login(1) implementation of util-linux in release 2.40. This is related to client control over the CREDENTIALS_DIRECTORY environment variable, and requires an unprivileged local user to create a login.noauth file.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
High
Difficult to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
References 5
https://git.hadrons.org/cgit/debian/pkgs/inetutils.git/commit/?id=3953943d82963…
cve@mitre.org
https://lists.gnu.org/archive/html/bug-inetutils/2026-02/msg00000.html
cve@mitre.org
https://lists.gnu.org/archive/html/bug-inetutils/2026-02/msg00012.html
cve@mitre.org
https://www.openwall.com/lists/oss-security/2026/02/24/1
cve@mitre.org
http://www.openwall.com/lists/oss-security/2026/02/27/3
af854a3a-2127-422b-91ae-364da2661108