{"id":"CVE-2025-0620","title":"A flaw was found in Samba","summary":"A flaw was found in Samba. The smbd service daemon does not pick up group membership changes when re-authenticating an expired SMB session. This issue can expose file shares until clients disconnect and then connect again.","severity":"medium","cvss":4.9,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-552"],"vendor":"samba","product":"samba","affected":["samba >= 4.21.0, < 4.21.6","samba >= 4.22.0, < 4.22.2"],"patched":["samba 4.22.2"],"published":"2025-06-06","updated":"2026-06-25","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-0620","references":[{"url":"https://access.redhat.com/security/cve/CVE-2025-0620","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2370453","label":"secalert@redhat.com"},{"url":"https://www.samba.org/samba/security/CVE-2025-0620.html","label":"secalert@redhat.com"},{"url":"http://www.openwall.com/lists/oss-security/2025/06/03/8","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.00746,"epssPercentile":0.52898,"ingestedAt":"2026-06-29T13:24:34.352Z","slug":"CVE-2025-0620","body":"## Overview\n\nA flaw was found in Samba. The smbd service daemon does not pick up group membership changes when re-authenticating an expired SMB session. This issue can expose file shares until clients disconnect and then connect again.\n\n## Affected\n\n- `samba >= 4.21.0, < 4.21.6`\n- `samba >= 4.22.0, < 4.22.2`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `samba 4.22.2`","depth":"sunlit","depthScore":27,"depthScoreParts":{"impact":27,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}