Denial of Service Vulnerability in sssd by Red Hat
CVE-2026-104030

5.5MEDIUM

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:
5 October 2026

What is CVE-2026-104030?

A vulnerability in sssd allows a local user to trigger a Denial of Service condition by providing a malformed passkey authentication token that lacks proper null terminators. This misconfiguration leads to the authentication service reading beyond the allocated memory buffer, which can crash the process and disrupt authentication services for other users.

References

https://access.redhat.com/security/cve/CVE-2026-104030
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2479429
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
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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