USN-7564-1

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/notices/USN-7564-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7564-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-7564-1
Upstream
Related
Published
2025-06-10T13:30:31Z
Modified
2026-01-14T03:30:28Z
Summary
samba vulnerability
Details

It was discovered that Samba incorrectly handled certain group membership changes when using Kerberos authentication. A remote user could possibly use this issue to continue to access resources after being removed by an administrator.

References

Affected packages

Ubuntu:25.04 / samba

Package

Name
samba
Purl
pkg:deb/ubuntu/samba@2:4.21.4+dfsg-1ubuntu3.1?arch=source&distro=plucky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2:4.21.4+dfsg-1ubuntu3.1

Affected versions

2:4.*
2:4.20.4+dfsg-1ubuntu1
2:4.20.4+dfsg-1ubuntu2
2:4.20.4+dfsg-1ubuntu3
2:4.20.4+dfsg-1ubuntu5
2:4.21.4+dfsg-1ubuntu2
2:4.21.4+dfsg-1ubuntu3

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "ctdb",
            "binary_version":  "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "ldb-tools",
            "binary_version":  "2:2.10.0+samba4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "libldb-dev",
            "binary_version":  "2:2.10.0+samba4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "libldb2",
            "binary_version":  "2:2.10.0+samba4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "libnss-winbind",
            "binary_version":  "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "libpam-winbind",
            "binary_version":  "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "libsmbclient-dev",
            "binary_version":  "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "libsmbclient0",
            "binary_version":  "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "libtalloc-dev",
            "binary_version":  "2:2.4.2+samba4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "libtalloc2",
            "binary_version":  "2:2.4.2+samba4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "libtdb-dev",
            "binary_version":  "2:1.4.12+samba4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "libtdb1",
            "binary_version":  "2:1.4.12+samba4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "libtevent-dev",
            "binary_version":  "2:0.16.1+samba4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "libtevent0t64",
            "binary_version":  "2:0.16.1+samba4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "libwbclient-dev",
            "binary_version":  "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "libwbclient0",
            "binary_version":  "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "python3-ldb",
            "binary_version":  "2:2.10.0+samba4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "python3-samba",
            "binary_version":  "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "python3-talloc",
            "binary_version":  "2:2.4.2+samba4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "python3-tdb",
            "binary_version":  "2:1.4.12+samba4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "registry-tools",
            "binary_version":  "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "samba",
            "binary_version":  "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "samba-ad-dc",
            "binary_version":  "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "samba-ad-provision",
            "binary_version":  "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "samba-common",
            "binary_version":  "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "samba-common-bin",
            "binary_version":  "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "samba-dev",
            "binary_version":  "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "samba-dsdb-modules",
            "binary_version":  "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "samba-libs",
            "binary_version":  "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "samba-testsuite",
            "binary_version":  "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "samba-vfs-ceph",
            "binary_version":  "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "samba-vfs-glusterfs",
            "binary_version":  "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "samba-vfs-modules",
            "binary_version":  "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "samba-vfs-modules-extra",
            "binary_version":  "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "smbclient",
            "binary_version":  "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "tdb-tools",
            "binary_version":  "2:1.4.12+samba4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name":  "winbind",
            "binary_version":  "2:4.21.4+dfsg-1ubuntu3.1"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2025-0620",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:25.04"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7564-1.json"