CVE-2025-0620

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

CVSS 4.9 MEDIUMEPSS 0.6%CWE-552

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 4.9EPSS 0.6%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

06 Jun 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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

Affected products

sambaRed Hat · Red Hat Enterprise Linux 10 Red Hat · Red Hat Enterprise Linux 6 Red Hat · Red Hat Enterprise Linux 7 Red Hat · Red Hat Enterprise Linux 8 Red Hat · Red Hat Enterprise Linux 9 Red Hat · Red Hat In-Vehicle Operating System 1 Red Hat · Red Hat OpenShift Container Platform 4

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References

https://access.redhat.com/security/cve/CVE-2025-0620 https://bugzilla.redhat.com/show_bug.cgi?id=2370453 https://www.samba.org/samba/security/CVE-2025-0620.html http://www.openwall.com/lists/oss-security/2025/06/03/8