{"id":"CVE-2026-104039","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-104039","generatedAt":"2026-10-27T23:56:30.085Z","title":"A local user can cause a denial of service (DoS) by disrupting system authentication services.","description":"A flaw was found in SSSD. A local user can cause a denial of service (DoS) by disrupting system authentication services. When handling Generic Security Services Application Programming Interface (GSSAPI) authentication in the Pluggable Authentication Module (PAM) responder, cached connection state is freed upon completion without clearing the reference pointer. An attacker can exploit this by sending an additional request over the same connection, causing the service to access invalid memory and unexpectedly terminate.","published":"2026-10-06T02:17:03.000Z","lastModified":"2026-10-08T03:16:33.000Z","status":"Undergoing Analysis","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"3.1","score":4.7,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-825"],"affected":[],"epss":{"score":0.00102,"percentile":0.0092,"date":"2026-10-26","history":[{"date":"2026-10-06","score":0.00102,"percentile":0.00862}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.10%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-06T02:17:03.000Z","detail":{"score":"4.7","severity":"MEDIUM","publishedAt":"2026-10-06T02:17:03.013Z"},"summary":"New CVE, medium severity (CVSS 4.7)."}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-104039","source":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2478956","source":"secalert@redhat.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-104039","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}