CVE-2026-119079

krb5: MIT krb5 KDC unauthenticated CPU DoS via quadratic ASN.1 SEQUENCE OF decoding

krb5

decode_sequence_of() in lib/krb5/asn.1/asn1_encode.c in MIT Kerberos 5 (aka krb5) 1.11 and later grows the decoded element array one entry at a time, which allows remote attackers to cause a denial of service (CPU consumption in the KDC) by sending an unauthenticated AS-REQ or TGS-REQ with a large number of elements in a SEQUENCE OF field over TCP.

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-2026-119079
• Red Hat
  https://bugzilla.redhat.com/show_bug.cgi?id=2479231
• NVD
  CVE-2026-119079