Remote Denial of Service Vulnerability in MIT Kerberos 5
CVE-2026-119079

7.5HIGH

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Vendor
CVE Published:
9 November 2026

What is CVE-2026-119079?

The decode_sequence_of() function in the lib/krb5/asn.1/asn1_encode.c file of MIT Kerberos 5, versions 1.11 and later, is susceptible to a denial of service attack. This vulnerability allows remote attackers to destabilize the Key Distribution Center (KDC) by sending unauthenticated AS-REQ or TGS-REQ requests containing a large number of elements in a SEQUENCE OF field, resulting in excessive CPU consumption.

References

https://access.redhat.com/security/cve/CVE-2026-119079
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2479231
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

This issue was discovered by AISLE Research and Found by AISLE in partnership with Red Hat.
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