CVE-2025-0620

MEDIUM

Samba 4.21.0-4.21.5 - Unauthenticated File Share Exposure via Session Reauthentication

Title source: llm
STIX 2.1

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.

References (4)

Core 4
Core References
Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2025/06/03/8
Third Party Advisory vdb-entry x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2025-0620
Issue Tracking, Third Party Advisory issue-tracking x_refsource_redhat
https://bugzilla.redhat.com/show_bug.cgi?id=2370453

Scores

CVSS v3 4.9
EPSS 0.0060
EPSS Percentile 43.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-552
Status published
Products (7)
Red 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 OpenShift Container Platform 4
samba/samba 4.21.0 - 4.21.6
Published Jun 06, 2025
Tracked Since Feb 18, 2026