{"id":"CLSA-2026-1779354817","summary":"samba: Fix of CVE-2021-20251","details":"- CVE-2021-20251: fix race condition in the password lockout code that\n  allowed determined attackers to exceed the configured bad-password\n  count by issuing concurrent authentication / SAMR password-change\n  requests for the same account; the bad-password-count read and the\n  follow-up increment now run under a per-user named mutex in both\n  check_sam_security() and pass_oem_change()","modified":"2026-05-27T11:18:28.003781988Z","published":"2026-05-21T09:13:41Z","upstream":["CVE-2021-20251"],"references":[{"type":"ADVISORY","url":"https://errata.tuxcare.com/els_os/oraclelinux7els/CLSA-2026-1779354817.html"}],"affected":[{"package":{"name":"ctdb","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/ctdb?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.16-25.0.9.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1779354817.json"}},{"package":{"name":"ctdb-tests","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/ctdb-tests?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.16-25.0.9.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1779354817.json"}},{"package":{"name":"libsmbclient","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/libsmbclient?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.16-25.0.9.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1779354817.json"}},{"package":{"name":"libsmbclient-devel","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/libsmbclient-devel?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.16-25.0.9.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1779354817.json"}},{"package":{"name":"libwbclient","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/libwbclient?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.16-25.0.9.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1779354817.json"}},{"package":{"name":"libwbclient-devel","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/libwbclient-devel?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.16-25.0.9.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1779354817.json"}},{"package":{"name":"samba","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/samba?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.16-25.0.9.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1779354817.json"}},{"package":{"name":"samba-client","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/samba-client?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.16-25.0.9.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1779354817.json"}},{"package":{"name":"samba-client-libs","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/samba-client-libs?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.16-25.0.9.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1779354817.json"}},{"package":{"name":"samba-common","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/samba-common?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.16-25.0.9.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1779354817.json"}},{"package":{"name":"samba-common-libs","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/samba-common-libs?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.16-25.0.9.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1779354817.json"}},{"package":{"name":"samba-common-tools","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/samba-common-tools?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.16-25.0.9.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1779354817.json"}},{"package":{"name":"samba-dc","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/samba-dc?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.16-25.0.9.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1779354817.json"}},{"package":{"name":"samba-dc-libs","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/samba-dc-libs?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.16-25.0.9.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1779354817.json"}},{"package":{"name":"samba-devel","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/samba-devel?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.16-25.0.9.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1779354817.json"}},{"package":{"name":"samba-krb5-printing","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/samba-krb5-printing?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.16-25.0.9.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1779354817.json"}},{"package":{"name":"samba-libs","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/samba-libs?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.16-25.0.9.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1779354817.json"}},{"package":{"name":"samba-pidl","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/samba-pidl?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.16-25.0.9.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1779354817.json"}},{"package":{"name":"samba-python","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/samba-python?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.16-25.0.9.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1779354817.json"}},{"package":{"name":"samba-python-test","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/samba-python-test?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.16-25.0.9.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1779354817.json"}},{"package":{"name":"samba-test","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/samba-test?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.16-25.0.9.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1779354817.json"}},{"package":{"name":"samba-test-libs","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/samba-test-libs?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.16-25.0.9.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1779354817.json"}},{"package":{"name":"samba-vfs-glusterfs","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/samba-vfs-glusterfs?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.16-25.0.9.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1779354817.json"}},{"package":{"name":"samba-winbind","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/samba-winbind?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.16-25.0.9.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1779354817.json"}},{"package":{"name":"samba-winbind-clients","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/samba-winbind-clients?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.16-25.0.9.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1779354817.json"}},{"package":{"name":"samba-winbind-krb5-locator","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/samba-winbind-krb5-locator?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.16-25.0.9.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1779354817.json"}},{"package":{"name":"samba-winbind-modules","ecosystem":"TuxCare:OracleLinux:7","purl":"pkg:rpm/tuxcare/samba-winbind-modules?distro=oraclelinux-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10.16-25.0.9.el7_9.tuxcare.els8"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux7els/CLSA-2026-1779354817.json"}}],"schema_version":"1.7.5"}