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CVE

CVE-2025-0620

A flaw was found in Samba. The smbd service daemon does not pick up group membership changes when re-authenticating an e

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.

MEDIUM · CVSS 4.9 EPSS 0.0025
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-552Files or Directories Accessible to External Parties
▤

Affected Products & Versions

2
samba>= 4.21.0 and < 4.21.6
samba>= 4.22.0 and < 4.22.2
▣

Scoring & Timeline

4.9
MEDIUM · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD06 Jun 2025 · 02:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

3
suse-csafSUSE-SU-2025:02230-1
suse-csafopenSUSE-SU-2025:15296-1
usnUSN-7564-1
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
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
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