CVE-2025-0620CWE-552

CVE-2025-0620

Medium · published June 6, 2025

CVSS v3.1

4.9

EPSS

Percentile

54.3

In the wild

Unconfirmed

What it is

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.

The record

Technical detail

CVSS v3.1: 4.9 · MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0: Not supplied
EPSS: 0.00746 · 54.3th percentile
Weakness: CWE-552 · Files or Directories Accessible to External Parties
Published: 2025-06-06T18:15Z

Affected products (2)

Product	Versions	Fixed in
samba/samba	≥ 4.21.0, < 4.21.6	4.21.6
samba/samba	≥ 4.22.0, < 4.22.2	4.22.2

References (4)

https://access.redhat.com/security/cve/CVE-2025-0620 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2370453 · [email protected]https://www.samba.org/samba/security/CVE-2025-0620.html · [email protected]http://www.openwall.com/lists/oss-security/2025/06/03/8 · af854a3a-2127-422b-91ae-364da2661108

EPSS history

Timeline

06 JUN 13:10Z
Samba: smbd doesn't pick up group membership changes when re-authenticating an expired smb session
cvelistv5