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When authenticating with a YubiKey, the SSSD PAM responder can crash due to a use-after-free vulnerability, where a memory pointer is incorrectly handled. A local attacker could exploit this flaw by manipulating smartcard or YubiKey contents, leading to a denial of service that disrupts authentication. This vulnerability also presents a potential for privilege escalation, although it is difficult to exploit.","epss":{"date":"2026-11-03","percentile":0.01943,"score":0.00121},"exploits":[],"kev":null,"metrics":[{"score":6.4,"severity":"medium","source":"CNA: redhat","vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},{"score":6.4,"severity":"medium","source":"NVD: secalert@redhat.com","vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}],"modifiedAt":1793791034170,"publishedAt":1782808021504,"references":[{"source":"CNA: redhat","tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-12610"},{"source":"CNA: redhat","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2490288"},{"source":"CNA: redhat","tags":[],"url":"https://github.com/SSSD/sssd/issues/8796"},{"source":"secalert@redhat.com","tags":["Mitigation","Vendor Advisory"],"url":"https://access.redhat.com/security/cve/CVE-2026-12610"},{"source":"secalert@redhat.com","tags":["Vendor Advisory"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2490288"},{"source":"secalert@redhat.com","tags":["Issue Tracking","Mitigation"],"url":"https://github.com/SSSD/sssd/issues/8796"}],"remediation":[{"kind":"workaround","source":"CNA: redhat","text":"Configure the sssd systemd service to automatically restart on failure. This ensures authentication remains available even if an attacker triggers the denial-of-service crash."}],"revision":"bf96d07b1096f24de7c2f74d214426914cae18da374fb3910fcb0bf3bf37c102","sources":[{"modifiedAt":1793787235788,"name":"CNA: redhat","retrievedAt":1793790525974,"url":"https://www.cve.org/CVERecord?id=CVE-2026-12610"},{"modifiedAt":1793791034170,"name":"NVD","retrievedAt":1793794544414,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-12610"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793790529132,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-12610"}],"ssvc":{"assessedAt":1782823462878,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"total"},"status":"published","title":"Sssd: use-after-free crash in sssd' 'sssd_pam' process","updatedAt":1793794544414}