What’s Vulnerable › Vulnerabilities

CVE-2026-90995: Sssd: sssd: local denial of service due to null pointer dereference in pam responder

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-09-14 · updated 2026-10-14
• Weakness: CWE-476

Description

A flaw was found in SSSD (System Security Services Daemon). A local attacker with privileges to connect to the PAM (Pluggable Authentication Modules) responder socket can send a specially crafted protocol request. If the `pam_app_services` configuration is enabled and the service item is omitted from the request, a NULL pointer dereference can occur. This vulnerability leads to a denial of service, causing the PAM responder to crash and disrupt authentication services.

Affected products

• [UNKNOWN] sssd: 2.12.0
• Red Hat Enterprise Linux: 7.0, 8.0, 9.0, 10.0
• Red Hat OpenShift Container Platform 4.18: 4.0

References

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

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