4.9 Medium

CVE-2025-0620 Samba: smbd doesn't pick up group membership changes when re-authenticating an expired smb session

Description

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.

CVSS 3.1 detail

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

Exploitable remotely over the network, with an administrator account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector: Network
Attack complexity: Low
Privileges required: High
Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None

Affected products and versions

Product	Affected versions	Fixed in
Red Hat Enterprise Linux 10	Versions not published
Red Hat Enterprise Linux 6	Versions not published
Red Hat Enterprise Linux 7	Versions not published
Red Hat Enterprise Linux 8	Versions not published
Red Hat Enterprise Linux 9	Versions not published
Red Hat OpenShift Container Platform 4	Versions not published
Red Hat In-Vehicle Operating System 1	Versions not published

References

access.redhat.com access.redhat.com
RHBZ#2370453 bugzilla.redhat.com
www.samba.org www.samba.org

Timeline

Published June 6, 2025
Last modified November 5, 2026

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