CVE-2026-104034 (GCVE-0-2026-104034)

Vulnerability from cvelistv5 – Published: 2026-10-06 00:12 – Updated: 2026-10-06 14:47
VLAI
Title
Sssd: sssd: denial of service via use-after-free in kcm ticket renewal
Summary
A flaw was found in SSSD. A use-after-free vulnerability exists in the Kerberos Credential Manager (KCM) responder during Kerberos ticket-granting ticket (TGT) renewal, where a deferred callback accesses memory that has already been released. An authenticated local user with a renewable Kerberos ticket can trigger this issue on systems configured with KCM renewal, causing the KCM responder service to crash and resulting in a Denial of Service (DoS).
Severity
4.7 (Medium)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-06 14:42 UTC
CWE
  • CWE-825 - Expired Pointer Dereference
Assigner
redhat CNA under the redhat root
CNA scorecard B 81/100 over 1014 records in the last 180 days details
References
URL Tags
https://access.redhat.com/security/cve/CVE-2026-104034 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2479178 issue-trackingx_refsource_REDHAT
Impacted products
Date Public
2026-10-05 23:29
Credits
This issue was discovered by Found by AISLE in partnership with Red Hat.
Show details on NVD website
To clipboard 

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