Denial of Service Vulnerability in SSSD Affecting Red Hat Products
CVE-2026-104042

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:
6 October 2026

What is CVE-2026-104042?

A vulnerability exists in SSSD where a local attacker can exploit the service by sending a specially crafted Pluggable Authentication Module (PAM) request that includes a zero-length authentication token. This exploitation occurs due to a lack of proper input validation, leading the service to read beyond buffer boundaries while processing the token, ultimately causing the PAM responder to crash. This situation creates a Denial of Service condition, impacting the availability and reliability of the service.

References

https://access.redhat.com/security/cve/CVE-2026-104042
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2478862
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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