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 …

Medium CVSS 4.9

CVECVE-2025-0620

First seen2026-08-21 14:15 UTC

Disclosed2025-06-06 14:15 UTC

Last updated2026-08-21 14:15 UTC

Channel statusauto

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.

In-depth triage

No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).

Affected products

Sources

NVD DATABASE

Original Links

https://access.redhat.com/security/cve/CVE-2025-0620 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2370453 Issue Tracking
https://www.samba.org/samba/security/CVE-2025-0620.html Vendor Advisory
http://www.openwall.com/lists/oss-security/2025/06/03/8 Mailing List

Timeline

2026-08-21 nvd_ingest NVD