# CVE-2026-104045: Sssd: sssd: denial of service via race condition in autofs responder Status: published. Published: 2026-10-06. Updated: 2026-11-05. A flaw was found in SSSD. A local user can trigger a Denial of Service (DoS) by exploiting a race condition in the autofs responder between asynchronous enumeration completion and map invalidation. By repeatedly sending concurrent map enumeration and invalidation requests, an attacker can cause memory to leak, leading to excessive memory consumption that can disrupt or crash the autofs service. ## Remediation - workaround: A real workaround exists: disable the SSSD autofs responder on systems where automount map integration via SSSD is not required. 1. Stop and mask the SSSD autofs socket and service: # systemctl stop sssd-autofs.socket sssd-autofs.service # systemctl mask sssd-autofs.socket sssd-autofs.service 2. If the 'services' line in /etc/sssd/sssd.conf explicitly lists 'autofs', remove 'autofs' from the comma-separated list and restart SSSD: # systemctl restart sssd Caveats: disabling the autofs responder prevents SSSD from serving automount maps, which will disrupt automated mounting of shares or user directories managed via SSSD. Restarting the SSSD service will briefly interrupt active authentication and directory lookup operations on the system. Where the autofs responder must remain enabled, restricting local access to the responder to trusted users, where deployment policy permits, and avoiding repeated map invalidation and enumeration cycles against large maps can reduce exposure. No released package fix is currently established for this issue. (source: CNA: redhat) ## Affected products and versions - Red Hat / Red Hat Enterprise Linux 10 (sssd): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat Enterprise Linux 6 (sssd): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat Enterprise Linux 7 (sssd): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat Enterprise Linux 8 (sssd): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat Enterprise Linux 9 (sssd): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat OpenShift Container Platform 4 (openshift/ose-rhel-coreos-8): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat OpenShift Container Platform 4 (openshift/ose-rhel-coreos-9): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat OpenShift Container Platform 5 (openshift/ose-rhel-coreos-9): Version range not reported. Source: CNA: redhat ## NVD configuration conditions Affected CPE matches depend on the following AND/OR and negation conditions: ```json [ { "negate": false, "nodes": [ { "cpeMatch": [ { "criteria": "cpe:2.3:a:fedoraproject:sssd:2.12.0:*:*:*:*:*:*:*", "vulnerable": true }, { "criteria": "cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*", "vulnerable": true }, { "criteria": "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*", "vulnerable": true }, { "criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*", "vulnerable": true }, { "criteria": "cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*", "vulnerable": true }, { "criteria": "cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*", "vulnerable": true } ], "negate": false, "operator": "OR" } ], "operator": "OR" } ] ``` ## Severity and prioritization - CVSS 3.1: 4.7 (medium); CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H; source: CNA: redhat - CVSS 3.1: 4.7 (medium); CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H; source: NVD: secalert@redhat.com - CISA KEV: No listing in collected sources - EPSS: 0.13% as of 2026-11-05; percentile 2.21% - SSVC: exploitation poc; automatable no; technical impact partial; source ADP: CISA-ADP - Weaknesses: CWE-772 ## Exploit evidence - exploit: https://bugzilla.redhat.com/show_bug.cgi?id=2478663 (ADP: CISA-ADP) - exploit: https://bugzilla.redhat.com/show_bug.cgi?id=2478663 (secalert@redhat.com) - exploit: https://bugzilla.redhat.com/show_bug.cgi?id=2478663 (134c704f-9b21-4f2e-91b3-4a467353bcc0) ## References - https://access.redhat.com/security/cve/CVE-2026-104045 (CNA: redhat; vdb-entry, x_refsource_REDHAT) - https://bugzilla.redhat.com/show_bug.cgi?id=2478663 (CNA: redhat; issue-tracking, x_refsource_REDHAT) - https://bugzilla.redhat.com/show_bug.cgi?id=2478663 (ADP: CISA-ADP; exploit) - https://access.redhat.com/security/cve/CVE-2026-104045 (secalert@redhat.com; Vendor Advisory) - https://bugzilla.redhat.com/show_bug.cgi?id=2478663 (secalert@redhat.com; Exploit, Issue Tracking, Mitigation, Vendor Advisory) - https://bugzilla.redhat.com/show_bug.cgi?id=2478663 (134c704f-9b21-4f2e-91b3-4a467353bcc0; Exploit, Issue Tracking, Mitigation, Vendor Advisory) ## Provenance - CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2026-104045; retrieved 2026-11-05; source updated 2026-11-05 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-104045; retrieved 2026-11-05; source updated 2026-11-05 - FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-104045; retrieved 2026-11-05; source updated Not reported Revision: 9c7a4ef5a8a44979be381e0fe43042a8915ce9eab69be5e2c5d3c817ddd9ca05 Canonical: https://y2.dev/cve/CVE-2026-104045 ## Agent and API access Public CVE pages, Markdown, and JSON are free to read without an account or API key. - Public catalog: https://y2.dev/cve/index.json. 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