Vulnerability 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 Score
4.9
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Samba | Samba | >= 4.21.0, < 4.21.6 |
Related Weaknesses (CWE)
References
- https://access.redhat.com/security/cve/CVE-2025-0620Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2370453Issue TrackingThird Party Advisory
- https://www.samba.org/samba/security/CVE-2025-0620.htmlVendor Advisory
- http://www.openwall.com/lists/oss-security/2025/06/03/8Mailing ListThird Party Advisory
FAQ
What is CVE-2025-0620?
CVE-2025-0620 is a vulnerability with a CVSS score of 4.9 (MEDIUM). 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 a...
How severe is CVE-2025-0620?
CVE-2025-0620 has been rated MEDIUM with a CVSS base score of 4.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-0620?
Check the references section above for vendor advisories and patch information. Affected products include: Samba Samba.