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CVE-2025-0620

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

Published: Jun 6, 2025Updated: Jan 8, 2026 Sources: CVE List NVD BDUCWE-552
4.9MEDIUM
NVD MITRE
EPSS Score
0.6%
Top 56.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:HUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-552

Affected Products

sambasamba
LibraryLibrary
Operating Systems / unix-bsd
Debian GNU/LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
Astra Linux Special EditionООО «РусБИТех-Астра»
On-premOS
Operating Systems / linux-distro
UbuntuCanonical Ltd.
On-premOS
Operating Systems / linux-distro
SambaSamba Team
LibraryLibrary
OSS Libraries / generic-library
sambaoss-projectDEOperating Systems
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
ооо «русбитех-астра»commercialRUOperating Systemsaka rusbitech-astra
canonical ltd.commercialGBOperating Systemsaka canonical
samba teamoss-projectAUEnterprise Softwareaka samba
and 8 more affected products View all →

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://access.redhat.com/security/cve/CVE-2025-0620
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2370453
bugzilla.redhat.com
https://www.samba.org/samba/security/CVE-2025-0620.html
samba.org
and 8 more references View all →

Timeline

Published
Jun 6, 2025
Last Updated
Jan 8, 2026

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