UBUNTU-CVE-2026-2340

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Source
https://ubuntu.com/security/CVE-2026-2340
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2340.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-2340
Upstream
  • CVE-2026-2340
Downstream
Related
Published
2026-05-26T00:00:00Z
Modified
2026-06-10T01:15:09.512252695Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A flaw was found in Samba’s vfs_worm module. The module is intended to provide write-once, read-many (WORM) protections by preventing modification of files after a configurable grace period. Due to insufficient validation during rename operations, an authenticated user with write access to a share could overwrite a protected file by renaming a newly created file over the existing WORM-protected file.

References

Affected packages

Ubuntu:22.04:LTS / samba

Package

Name
samba
Purl
pkg:deb/ubuntu/samba?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:4.15.13+dfsg-0ubuntu1.12

Affected versions

2:4.*
2:4.13.5+dfsg-2ubuntu2
2:4.13.5+dfsg-2ubuntu3
2:4.13.14+dfsg-0ubuntu1
2:4.13.14+dfsg-0ubuntu2
2:4.15.5~dfsg-0ubuntu1
2:4.15.5~dfsg-0ubuntu2
2:4.15.5~dfsg-0ubuntu4
2:4.15.5~dfsg-0ubuntu5
2:4.15.5~dfsg-0ubuntu5.1
2:4.15.9+dfsg-0ubuntu0.2
2:4.15.9+dfsg-0ubuntu0.3
2:4.15.13+dfsg-0ubuntu1
2:4.15.13+dfsg-0ubuntu1.1
2:4.15.13+dfsg-0ubuntu1.2
2:4.15.13+dfsg-0ubuntu1.3
2:4.15.13+dfsg-0ubuntu1.4
2:4.15.13+dfsg-0ubuntu1.5
2:4.15.13+dfsg-0ubuntu1.6
2:4.15.13+dfsg-0ubuntu1.7
2:4.15.13+dfsg-0ubuntu1.8
2:4.15.13+dfsg-0ubuntu1.9
2:4.15.13+dfsg-0ubuntu1.10

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "ctdb",
            "binary_version": "2:4.15.13+dfsg-0ubuntu1.12"
        },
        {
            "binary_name": "libnss-winbind",
            "binary_version": "2:4.15.13+dfsg-0ubuntu1.12"
        },
        {
            "binary_name": "libpam-winbind",
            "binary_version": "2:4.15.13+dfsg-0ubuntu1.12"
        },
        {
            "binary_version": "2:4.15.13+dfsg-0ubuntu1.12",
            "binary_name": "libsmbclient"
        },
        {
            "binary_name": "libwbclient0",
            "binary_version": "2:4.15.13+dfsg-0ubuntu1.12"
        },
        {
            "binary_name": "python3-samba",
            "binary_version": "2:4.15.13+dfsg-0ubuntu1.12"
        },
        {
            "binary_version": "2:4.15.13+dfsg-0ubuntu1.12",
            "binary_name": "registry-tools"
        },
        {
            "binary_name": "samba",
            "binary_version": "2:4.15.13+dfsg-0ubuntu1.12"
        },
        {
            "binary_name": "samba-common",
            "binary_version": "2:4.15.13+dfsg-0ubuntu1.12"
        },
        {
            "binary_name": "samba-common-bin",
            "binary_version": "2:4.15.13+dfsg-0ubuntu1.12"
        },
        {
            "binary_name": "samba-dsdb-modules",
            "binary_version": "2:4.15.13+dfsg-0ubuntu1.12"
        },
        {
            "binary_name": "samba-libs",
            "binary_version": "2:4.15.13+dfsg-0ubuntu1.12"
        },
        {
            "binary_name": "samba-testsuite",
            "binary_version": "2:4.15.13+dfsg-0ubuntu1.12"
        },
        {
            "binary_name": "samba-vfs-modules",
            "binary_version": "2:4.15.13+dfsg-0ubuntu1.12"
        },
        {
            "binary_name": "smbclient",
            "binary_version": "2:4.15.13+dfsg-0ubuntu1.12"
        },
        {
            "binary_name": "winbind",
            "binary_version": "2:4.15.13+dfsg-0ubuntu1.12"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2340.json"

Ubuntu:24.04:LTS / samba

Package

Name
samba
Purl
pkg:deb/ubuntu/samba?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:4.19.5+dfsg-4ubuntu9.6

Affected versions

2:4.*
2:4.18.6+dfsg-1ubuntu2
2:4.18.6+dfsg-1ubuntu2.1
2:4.18.6+dfsg-1ubuntu2.2
2:4.19.4+dfsg-3ubuntu1
2:4.19.5+dfsg-1ubuntu1
2:4.19.5+dfsg-4ubuntu7
2:4.19.5+dfsg-4ubuntu8
2:4.19.5+dfsg-4ubuntu9
2:4.19.5+dfsg-4ubuntu9.2
2:4.19.5+dfsg-4ubuntu9.3
2:4.19.5+dfsg-4ubuntu9.4

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "2:4.19.5+dfsg-4ubuntu9.6",
            "binary_name": "ctdb"
        },
        {
            "binary_name": "ldb-tools",
            "binary_version": "2:2.8.0+samba4.19.5+dfsg-4ubuntu9.6"
        },
        {
            "binary_version": "2:2.8.0+samba4.19.5+dfsg-4ubuntu9.6",
            "binary_name": "libldb2"
        },
        {
            "binary_name": "libnss-winbind",
            "binary_version": "2:4.19.5+dfsg-4ubuntu9.6"
        },
        {
            "binary_version": "2:4.19.5+dfsg-4ubuntu9.6",
            "binary_name": "libpam-winbind"
        },
        {
            "binary_name": "libsmbclient0",
            "binary_version": "2:4.19.5+dfsg-4ubuntu9.6"
        },
        {
            "binary_name": "libwbclient0",
            "binary_version": "2:4.19.5+dfsg-4ubuntu9.6"
        },
        {
            "binary_name": "python3-ldb",
            "binary_version": "2:2.8.0+samba4.19.5+dfsg-4ubuntu9.6"
        },
        {
            "binary_version": "2:4.19.5+dfsg-4ubuntu9.6",
            "binary_name": "python3-samba"
        },
        {
            "binary_version": "2:4.19.5+dfsg-4ubuntu9.6",
            "binary_name": "registry-tools"
        },
        {
            "binary_name": "samba",
            "binary_version": "2:4.19.5+dfsg-4ubuntu9.6"
        },
        {
            "binary_version": "2:4.19.5+dfsg-4ubuntu9.6",
            "binary_name": "samba-ad-dc"
        },
        {
            "binary_version": "2:4.19.5+dfsg-4ubuntu9.6",
            "binary_name": "samba-ad-provision"
        },
        {
            "binary_name": "samba-common",
            "binary_version": "2:4.19.5+dfsg-4ubuntu9.6"
        },
        {
            "binary_name": "samba-common-bin",
            "binary_version": "2:4.19.5+dfsg-4ubuntu9.6"
        },
        {
            "binary_version": "2:4.19.5+dfsg-4ubuntu9.6",
            "binary_name": "samba-dsdb-modules"
        },
        {
            "binary_name": "samba-libs",
            "binary_version": "2:4.19.5+dfsg-4ubuntu9.6"
        },
        {
            "binary_name": "samba-testsuite",
            "binary_version": "2:4.19.5+dfsg-4ubuntu9.6"
        },
        {
            "binary_version": "2:4.19.5+dfsg-4ubuntu9.6",
            "binary_name": "samba-vfs-modules"
        },
        {
            "binary_name": "samba-vfs-modules-extra",
            "binary_version": "2:4.19.5+dfsg-4ubuntu9.6"
        },
        {
            "binary_name": "smbclient",
            "binary_version": "2:4.19.5+dfsg-4ubuntu9.6"
        },
        {
            "binary_version": "2:4.19.5+dfsg-4ubuntu9.6",
            "binary_name": "winbind"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2340.json"

Ubuntu:25.10 / samba

Package

Name
samba
Purl
pkg:deb/ubuntu/samba?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:4.22.3+dfsg-4ubuntu2.4

Affected versions

2:4.*
2:4.21.4+dfsg-1ubuntu3
2:4.21.4+dfsg-1ubuntu4
2:4.21.4+dfsg-1ubuntu5
2:4.22.2+dfsg-1ubuntu1
2:4.22.3+dfsg-4ubuntu1
2:4.22.3+dfsg-4ubuntu2
2:4.22.3+dfsg-4ubuntu2.1
2:4.22.3+dfsg-4ubuntu2.2

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "ctdb",
            "binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
        },
        {
            "binary_version": "2:2.11.0+samba4.22.3+dfsg-4ubuntu2.4",
            "binary_name": "ldb-tools"
        },
        {
            "binary_name": "libldb2",
            "binary_version": "2:2.11.0+samba4.22.3+dfsg-4ubuntu2.4"
        },
        {
            "binary_name": "libnss-winbind",
            "binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
        },
        {
            "binary_name": "libpam-winbind",
            "binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
        },
        {
            "binary_version": "2:4.22.3+dfsg-4ubuntu2.4",
            "binary_name": "libsmbclient0"
        },
        {
            "binary_name": "libtalloc2",
            "binary_version": "2:2.4.3+samba4.22.3+dfsg-4ubuntu2.4"
        },
        {
            "binary_name": "libtdb1",
            "binary_version": "2:1.4.13+samba4.22.3+dfsg-4ubuntu2.4"
        },
        {
            "binary_name": "libtevent0t64",
            "binary_version": "2:0.16.2+samba4.22.3+dfsg-4ubuntu2.4"
        },
        {
            "binary_name": "libwbclient0",
            "binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
        },
        {
            "binary_version": "2:2.11.0+samba4.22.3+dfsg-4ubuntu2.4",
            "binary_name": "python3-ldb"
        },
        {
            "binary_name": "python3-samba",
            "binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
        },
        {
            "binary_name": "python3-talloc",
            "binary_version": "2:2.4.3+samba4.22.3+dfsg-4ubuntu2.4"
        },
        {
            "binary_name": "python3-tdb",
            "binary_version": "2:1.4.13+samba4.22.3+dfsg-4ubuntu2.4"
        },
        {
            "binary_name": "registry-tools",
            "binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
        },
        {
            "binary_name": "samba",
            "binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
        },
        {
            "binary_name": "samba-ad-dc",
            "binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
        },
        {
            "binary_version": "2:4.22.3+dfsg-4ubuntu2.4",
            "binary_name": "samba-ad-provision"
        },
        {
            "binary_name": "samba-common",
            "binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
        },
        {
            "binary_name": "samba-common-bin",
            "binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
        },
        {
            "binary_version": "2:4.22.3+dfsg-4ubuntu2.4",
            "binary_name": "samba-dsdb-modules"
        },
        {
            "binary_name": "samba-libs",
            "binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
        },
        {
            "binary_name": "samba-testsuite",
            "binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
        },
        {
            "binary_name": "samba-vfs-ceph",
            "binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
        },
        {
            "binary_version": "2:4.22.3+dfsg-4ubuntu2.4",
            "binary_name": "samba-vfs-glusterfs"
        },
        {
            "binary_name": "samba-vfs-modules",
            "binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
        },
        {
            "binary_name": "samba-vfs-modules-extra",
            "binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
        },
        {
            "binary_version": "2:4.22.3+dfsg-4ubuntu2.4",
            "binary_name": "smbclient"
        },
        {
            "binary_version": "2:1.4.13+samba4.22.3+dfsg-4ubuntu2.4",
            "binary_name": "tdb-tools"
        },
        {
            "binary_name": "winbind",
            "binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2340.json"

Ubuntu:26.04:LTS / samba

Package

Name
samba
Purl
pkg:deb/ubuntu/samba?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:4.23.6+dfsg-1ubuntu2.1

Affected versions

2:4.*
2:4.22.3+dfsg-4ubuntu2
2:4.22.3+dfsg-4ubuntu2.1
2:4.22.3+dfsg-4ubuntu3
2:4.22.3+dfsg-4ubuntu4
2:4.23.4+dfsg-1ubuntu1
2:4.23.5+dfsg-1ubuntu2
2:4.23.6+dfsg-1ubuntu1
2:4.23.6+dfsg-1ubuntu2

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "2:4.23.6+dfsg-1ubuntu2.1",
            "binary_name": "ctdb"
        },
        {
            "binary_version": "2:2.11.0+samba4.23.6+dfsg-1ubuntu2.1",
            "binary_name": "ldb-tools"
        },
        {
            "binary_name": "libldb2",
            "binary_version": "2:2.11.0+samba4.23.6+dfsg-1ubuntu2.1"
        },
        {
            "binary_name": "libnss-winbind",
            "binary_version": "2:4.23.6+dfsg-1ubuntu2.1"
        },
        {
            "binary_name": "libpam-winbind",
            "binary_version": "2:4.23.6+dfsg-1ubuntu2.1"
        },
        {
            "binary_version": "2:4.23.6+dfsg-1ubuntu2.1",
            "binary_name": "libsmbclient0"
        },
        {
            "binary_name": "libtalloc2",
            "binary_version": "2:2.4.3+samba4.23.6+dfsg-1ubuntu2.1"
        },
        {
            "binary_name": "libtdb1",
            "binary_version": "2:1.4.14+samba4.23.6+dfsg-1ubuntu2.1"
        },
        {
            "binary_name": "libtevent0t64",
            "binary_version": "2:0.17.1+samba4.23.6+dfsg-1ubuntu2.1"
        },
        {
            "binary_version": "2:4.23.6+dfsg-1ubuntu2.1",
            "binary_name": "libwbclient0"
        },
        {
            "binary_name": "python3-ldb",
            "binary_version": "2:2.11.0+samba4.23.6+dfsg-1ubuntu2.1"
        },
        {
            "binary_name": "python3-samba",
            "binary_version": "2:4.23.6+dfsg-1ubuntu2.1"
        },
        {
            "binary_version": "2:2.4.3+samba4.23.6+dfsg-1ubuntu2.1",
            "binary_name": "python3-talloc"
        },
        {
            "binary_name": "python3-tdb",
            "binary_version": "2:1.4.14+samba4.23.6+dfsg-1ubuntu2.1"
        },
        {
            "binary_name": "registry-tools",
            "binary_version": "2:4.23.6+dfsg-1ubuntu2.1"
        },
        {
            "binary_version": "2:4.23.6+dfsg-1ubuntu2.1",
            "binary_name": "samba"
        },
        {
            "binary_name": "samba-ad-dc",
            "binary_version": "2:4.23.6+dfsg-1ubuntu2.1"
        },
        {
            "binary_version": "2:4.23.6+dfsg-1ubuntu2.1",
            "binary_name": "samba-ad-provision"
        },
        {
            "binary_version": "2:4.23.6+dfsg-1ubuntu2.1",
            "binary_name": "samba-common"
        },
        {
            "binary_name": "samba-common-bin",
            "binary_version": "2:4.23.6+dfsg-1ubuntu2.1"
        },
        {
            "binary_name": "samba-dsdb-modules",
            "binary_version": "2:4.23.6+dfsg-1ubuntu2.1"
        },
        {
            "binary_version": "2:4.23.6+dfsg-1ubuntu2.1",
            "binary_name": "samba-libs"
        },
        {
            "binary_version": "2:4.23.6+dfsg-1ubuntu2.1",
            "binary_name": "samba-testsuite"
        },
        {
            "binary_name": "samba-vfs-ceph",
            "binary_version": "2:4.23.6+dfsg-1ubuntu2.1"
        },
        {
            "binary_version": "2:4.23.6+dfsg-1ubuntu2.1",
            "binary_name": "samba-vfs-glusterfs"
        },
        {
            "binary_version": "2:4.23.6+dfsg-1ubuntu2.1",
            "binary_name": "samba-vfs-modules"
        },
        {
            "binary_name": "samba-vfs-modules-extra",
            "binary_version": "2:4.23.6+dfsg-1ubuntu2.1"
        },
        {
            "binary_name": "smbclient",
            "binary_version": "2:4.23.6+dfsg-1ubuntu2.1"
        },
        {
            "binary_version": "2:1.4.14+samba4.23.6+dfsg-1ubuntu2.1",
            "binary_name": "tdb-tools"
        },
        {
            "binary_name": "winbind",
            "binary_version": "2:4.23.6+dfsg-1ubuntu2.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2340.json"