{"id":"UBUNTU-CVE-2026-6245","details":"A flaw was found in the System Security Services Daemon (SSSD). The pam_passkey_child_read_data() function within the PAM passkey responder fails to properly handle raw bytes received from a pipe. Because the data is treated as a NUL-terminated C string without explicit termination, it results in an out-of-bounds read when processed by functions like snprintf(). A local attacker could potentially trigger this vulnerability by initiating a crafted passkey authentication request, causing the SSSD PAM responder to crash, resulting in a local Denial of Service (DoS).","modified":"2026-06-01T19:00:12.380579017Z","published":"2026-04-15T19:16:00Z","related":["USN-8355-1"],"upstream":["CVE-2026-6245"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-6245"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-6245"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8355-1"}],"affected":[{"package":{"name":"sssd","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/sssd?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.4-1.1ubuntu6.5"}]}],"versions":["2.9.1-2ubuntu2","2.9.1-2ubuntu3","2.9.2-1ubuntu2","2.9.4-1ubuntu1","2.9.4-1.1ubuntu3","2.9.4-1.1ubuntu5","2.9.4-1.1ubuntu6","2.9.4-1.1ubuntu6.1","2.9.4-1.1ubuntu6.2","2.9.4-1.1ubuntu6.3","2.9.4-1.1ubuntu6.4"],"ecosystem_specific":{"availability":"No subscription 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