CVE-2026-119079 vulnerability in Red Hat Products
Published on November 9, 2026
Krb5: mit krb5 kdc unauthenticated cpu dos via quadratic asn.1 sequence of decoding
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.
Vulnerability Analysis
CVE-2026-119079 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Timeline
Reported to Red Hat.
Made public. 175 days later.
Weakness Type
Incorrect Behavior Order: Early Amplification
The software allows an entity to perform a legitimate but expensive operation before authentication or authorization has taken place.
Products Associated with CVE-2026-119079
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