🛡️ CVE-2025-0620 on Debian — samba

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Distribution advisory

This page covers CVE-2025-0620 as tracked by Debian, for the package samba. The fix is available in version 2:4.22.2+dfsg-1; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs administrative privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability none.

Weakness class

DEBIAN-CVE-2025-0620 is classified as CWE-552: Files or Directories Accessible to External Parties. Files intended to stay internal are reachable from outside the application.

Affected software

DEBIAN-CVE-2025-0620 is recorded against 1 package.

  • samba (fixed in 2:4.22.2+dfsg-1)

Timeline and source

Published on 6 June 2025 and last revised on 4 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

security-tracker.debian.org (Advisory)

CVE-2025-0620 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2025-06-06
Updated 2026-08-20
Modified 2026-08-04
Fix URL N/A

Affected Packages

Software From version Fixed in
samba — 2:4.22.2+dfsg-1

Vulnerability Monitoring

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