A flaw was found in sssd. A local user can cause a Denial of Service (DoS) by exhausting the responder service's available file descriptors (system handles used for open connections). By opening and maintaining many concurrent connections to a responder socket while continuing to queue new connection attempts, an attacker can trigger an unthrottled retry loop. This condition leads to high CPU utilization and stalls the service, preventing legitimate identity and authentication requests from being processed.
Fix
Patch, vendor advisory and mitigation references on NVD 3
- https://access.redhat.com/security/cve/CVE-2026-88252 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2479240 Exploit, Issue Tracking, Mitigation, Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2479240 Exploit, Issue Tracking, Mitigation, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 5.5 · fedoraproject, redhatNVD modified 2026-10-20 19:39
Affected (CPE criteria) 6
cpe:2.3:a:fedoraproject:sssd:2.12.0:*:*:*:*:*:*:*cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
References 3
- https://access.redhat.com/security/cve/CVE-2026-88252 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2479240 Exploit, Issue Tracking, Mitigation, Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2479240 Exploit, Issue Tracking, Mitigation, Vendor Advisory