CVE-2026-28372

Summary

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.

Affected Software

Weaknesses

• CWE-829: CWE-829 Inclusion of Functionality from Untrusted Control Sphere

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: total

CVE Program Container

Additional References

• http://www.openwall.com/lists/oss-security/2026/02/27/3
• http://www.openwall.com/lists/oss-security/2026/03/06/2
• http://www.openwall.com/lists/oss-security/2026/03/06/3
• http://www.openwall.com/lists/oss-security/2026/03/07/1
• http://www.openwall.com/lists/oss-security/2026/03/07/2

References

• https://lists.gnu.org/archive/html/bug-inetutils/2026-02/msg00000.html
• https://git.hadrons.org/cgit/debian/pkgs/inetutils.git/commit/?id=3953943d8296310485f98963883a798545ab9a6c
• https://lists.gnu.org/archive/html/bug-inetutils/2026-02/msg00012.html
• https://www.openwall.com/lists/oss-security/2026/02/24/1

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