Local Denial of Service in SSSD Affects Red Hat Products
CVE-2026-90995

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:
14 September 2026

What is CVE-2026-90995?

A vulnerability exists in the System Security Services Daemon (SSSD) that allows a local attacker with the necessary privileges to connect to the PAM responder socket. By sending a specifically crafted protocol request without the service item, under certain configurations, it may trigger a NULL pointer dereference. This leads to a denial of service, where the PAM responder crashes, interrupting essential authentication services, thus potentially compromising system security.

References

https://access.redhat.com/security/cve/CVE-2026-90995
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2479464
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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