What’s Vulnerable › Vulnerabilities

CVE-2026-90996: Sssd: sssd: denial of service in nss responder via crafted zero-length requests

• 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 2026-10-07
• Weakness: CWE-191

Description

A flaw was found in sssd. A local unprivileged user could send a specially crafted request with a zero-length body to the Network Security Services (NSS) responder. This could lead to a denial-of-service condition, causing the NSS responder to become unstable or terminate. This vulnerability affects the availability of the system responder.

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-2026-90996
• https://bugzilla.redhat.com/show_bug.cgi?id=2478986

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