Medium [CVE-2025-0620] Samba: smbd doesn't pick up group membership changes when re-authenticating an expired smb session
This medium-severity Red Hat Linux advisory covers CVE-2025-0620 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat package: samba.
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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. Red Hat severity: Moderate — CVSS 4.9 (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N).
Weakness: CWE-552. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9.
Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: samba.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · medium-confidence parse· fetched 42 minutes ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 42 minutes ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 42 minutes ago·verify at source
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