Denial of Service Vulnerability in SSSD by Red Hat
CVE-2026-104038

5.9MEDIUM

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:
6 October 2026

What is CVE-2026-104038?

A vulnerability exists in SSSD that enables remote attackers to create a denial of service condition. This occurs when an attacker submits a certificate devoid of the required Security Identifier (SID) extension, leading to a failure in the service to verify its presence. Such a flaw can lead to process crashes during authentication or lookup operations, particularly in configurations utilizing SID-based certificate mapping rules.

References

https://access.redhat.com/security/cve/CVE-2026-104038
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2478980
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
5.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
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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