Denial of Service Vulnerability in MIT Kerberos 5 by Remote Attackers
CVE-2026-112323

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-2026-112323?

The AUTH_GSSAPI handler in MIT Kerberos 5 (version 1.5.2 and later) is susceptible to a denial of service condition. Remote attackers can exploit this vulnerability by sending repeated failed AUTH_GSSAPI_INIT requests. Each failed request results in increased memory usage due to client state allocation that is only released after a 15-minute timeout. This leads to a scenario where the attacker can generate memory exhaustion in the kadmind service, potentially disrupting its normal operations.

References

https://access.redhat.com/security/cve/CVE-2026-112323
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2478440
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 Found by AISLE in partnership with Red Hat.
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