Description
clean_client() in lib/rpc/svc_auth_gssapi.c in MIT Kerberos 5 (aka krb5) restarts its scan from the head of the client list after each removal, resulting in quadratic CPU cost. Remote attackers can cause a denial of service (CPU consumption in kadmind) by accumulating a large number of AUTH_GSSAPI client entries.
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Remediation
Vendor Workaround
Restrict network access to kadmind to trusted hosts, or disable it in favor of kadmin.local server-side command line tool for administration operations if possible.
Tracking
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Advisories
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References
History
Mon, 09 Nov 2026 18:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | clean_client() in lib/rpc/svc_auth_gssapi.c in MIT Kerberos 5 (aka krb5) restarts its scan from the head of the client list after each removal, resulting in quadratic CPU cost. Remote attackers can cause a denial of service (CPU consumption in kadmind) by accumulating a large number of AUTH_GSSAPI client entries. | |
| Title | Krb5: mit krb5 kadmind unauthenticated cpu dos via auth_gssapi client states cleanup | |
| First Time appeared |
Redhat
Redhat enterprise Linux Redhat hummingbird Redhat rhel Els |
|
| Weaknesses | CWE-770 | |
| CPEs | cpe:/a:redhat:enterprise_linux:10 cpe:/a:redhat:enterprise_linux:8 cpe:/a:redhat:enterprise_linux:9 cpe:/a:redhat:hummingbird:1 cpe:/o:redhat:rhel_els:6 cpe:/o:redhat:rhel_els:7 |
|
| Vendors & Products |
Redhat
Redhat enterprise Linux Redhat hummingbird Redhat rhel Els |
|
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2026-11-09T18:43:23.841Z
Reserved: 2026-10-19T14:27:47.648Z
Link: CVE-2026-112322
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OpenCVE Enrichment
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Weaknesses