CVE-2026-112320

krb5: MIT krb5 kadmind unauthenticated memory leak DoS via GSS-RPC auth flavor switching

krb5

The GSS-RPC transport layer in MIT Kerberos 5 (aka krb5) 1.4 and later does not release the previous authentication context when a client switches from an RPCSEC_GSS or AUTH_GSSAPI flavor to a non-GSS flavor on the same TCP connection. This allows remote attackers to cause a denial of service (memory exhaustion in kadmind) by repeatedly establishing and abandoning GSS authentication contexts.

9. Nov 2026

Ausgewertete Quellen

• Red Hat
  https://access.redhat.com/errata/RHSA-2026:99624
• Red Hat
  https://access.redhat.com/errata/RHSA-2026:99625
• Red Hat
  https://access.redhat.com/security/cve/CVE-2026-112320
• Red Hat
  https://bugzilla.redhat.com/show_bug.cgi?id=2478449
• NVD
  CVE-2026-112320