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UBUNTU-CVE-2026-3012 (CVE-2026-3012)
Vulnerability from osv_ubuntu – Published: 2026-05-26 00:00 – Updated: 2026-06-09 19:23 – Source website
VLAI
Details
A flaw was found in Samba’s certificate auto-enrollment Group Policy handling. When certificate auto-enrollment is enabled, Samba may retrieve a CA certificate over an unencrypted HTTP connection and install it into the local trust store without proper verification. An attacker with the ability to intercept or redirect network traffic could exploit this behavior to supply a malicious certificate authority certificate, potentially allowing interception or spoofing of trusted communications.
Severity
8.0 (High)
6.8 (Medium)
N/A (UNKNOWN)
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "ctdb",
"binary_version": "2:4.19.5+dfsg-4ubuntu9.6"
},
{
"binary_name": "ldb-tools",
"binary_version": "2:2.8.0+samba4.19.5+dfsg-4ubuntu9.6"
},
{
"binary_name": "libldb2",
"binary_version": "2:2.8.0+samba4.19.5+dfsg-4ubuntu9.6"
},
{
"binary_name": "libnss-winbind",
"binary_version": "2:4.19.5+dfsg-4ubuntu9.6"
},
{
"binary_name": "libpam-winbind",
"binary_version": "2:4.19.5+dfsg-4ubuntu9.6"
},
{
"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_name": "python3-samba",
"binary_version": "2:4.19.5+dfsg-4ubuntu9.6"
},
{
"binary_name": "registry-tools",
"binary_version": "2:4.19.5+dfsg-4ubuntu9.6"
},
{
"binary_name": "samba",
"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_version": "2:4.19.5+dfsg-4ubuntu9.6"
},
{
"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_name": "samba-dsdb-modules",
"binary_version": "2:4.19.5+dfsg-4ubuntu9.6"
},
{
"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_name": "samba-vfs-modules",
"binary_version": "2:4.19.5+dfsg-4ubuntu9.6"
},
{
"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_name": "winbind",
"binary_version": "2:4.19.5+dfsg-4ubuntu9.6"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "samba",
"purl": "pkg:deb/ubuntu/samba@2:4.19.5+dfsg-4ubuntu9.6?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2:4.19.5+dfsg-4ubuntu9.6"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"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_name": "ctdb",
"binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
},
{
"binary_name": "ldb-tools",
"binary_version": "2:2.11.0+samba4.22.3+dfsg-4ubuntu2.4"
},
{
"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_name": "libsmbclient0",
"binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
},
{
"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_name": "python3-ldb",
"binary_version": "2:2.11.0+samba4.22.3+dfsg-4ubuntu2.4"
},
{
"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_name": "samba-ad-provision",
"binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
},
{
"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_name": "samba-dsdb-modules",
"binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
},
{
"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_name": "samba-vfs-glusterfs",
"binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
},
{
"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_name": "smbclient",
"binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
},
{
"binary_name": "tdb-tools",
"binary_version": "2:1.4.13+samba4.22.3+dfsg-4ubuntu2.4"
},
{
"binary_name": "winbind",
"binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "samba",
"purl": "pkg:deb/ubuntu/samba@2:4.22.3+dfsg-4ubuntu2.4?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2:4.22.3+dfsg-4ubuntu2.4"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"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": "2:4.23.6+dfsg-1ubuntu2.1"
},
{
"binary_name": "ldb-tools",
"binary_version": "2:2.11.0+samba4.23.6+dfsg-1ubuntu2.1"
},
{
"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_name": "libsmbclient0",
"binary_version": "2:4.23.6+dfsg-1ubuntu2.1"
},
{
"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_name": "libwbclient0",
"binary_version": "2:4.23.6+dfsg-1ubuntu2.1"
},
{
"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_name": "python3-talloc",
"binary_version": "2:2.4.3+samba4.23.6+dfsg-1ubuntu2.1"
},
{
"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_name": "samba",
"binary_version": "2:4.23.6+dfsg-1ubuntu2.1"
},
{
"binary_name": "samba-ad-dc",
"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_version": "2:4.23.6+dfsg-1ubuntu2.1"
},
{
"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_name": "samba-libs",
"binary_version": "2:4.23.6+dfsg-1ubuntu2.1"
},
{
"binary_name": "samba-testsuite",
"binary_version": "2:4.23.6+dfsg-1ubuntu2.1"
},
{
"binary_name": "samba-vfs-ceph",
"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_version": "2:4.23.6+dfsg-1ubuntu2.1"
},
{
"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_name": "tdb-tools",
"binary_version": "2:1.4.14+samba4.23.6+dfsg-1ubuntu2.1"
},
{
"binary_name": "winbind",
"binary_version": "2:4.23.6+dfsg-1ubuntu2.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "samba",
"purl": "pkg:deb/ubuntu/samba@2:4.23.6+dfsg-1ubuntu2.1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2:4.23.6+dfsg-1ubuntu2.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"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"
]
}
],
"aliases": [],
"details": "A flaw was found in Samba\u2019s certificate auto-enrollment Group Policy handling. When certificate auto-enrollment is enabled, Samba may retrieve a CA certificate over an unencrypted HTTP connection and install it into the local trust store without proper verification. An attacker with the ability to intercept or redirect network traffic could exploit this behavior to supply a malicious certificate authority certificate, potentially allowing interception or spoofing of trusted communications.",
"id": "UBUNTU-CVE-2026-3012",
"modified": "2026-06-09T19:23:51Z",
"published": "2026-05-26T00:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-3012"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-3012"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8306-1"
}
],
"related": [
"USN-8306-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-3012"
]
}
CVE-2026-3012 (GCVE-0-2026-3012)
Vulnerability from cvelistv5 – Published: 2026-05-27 10:02 – Updated: 2026-09-18 12:04
VLAI
EPSS
VEX
Title
Samba: group policy certificate enrollment uses http:// without validation
Summary
A flaw was found in Samba’s certificate auto-enrollment Group Policy handling. When certificate auto-enrollment is enabled, Samba may retrieve a CA certificate over an unencrypted HTTP connection and install it into the local trust store without proper verification. An attacker with the ability to intercept or redirect network traffic could exploit this behavior to supply a malicious certificate authority certificate, potentially allowing interception or spoofing of trusted communications.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-27 00:00 UTC
CWE
- CWE-345 - Insufficient Verification of Data Authenticity
Assigner
References
25 references
Impacted products
39 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:4.23.5-109.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support |
Unaffected:
0:4.21.3-114.el10_0.1 , < *
(rpm)
cpe:/o:redhat:enterprise_linux_eus:10.0 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:4.19.4-16.el8_10 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8::appstream cpe:/a:redhat:enterprise_linux:8::crb cpe:/o:redhat:enterprise_linux:8::baseos |
|
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support |
Unaffected:
0:4.15.5-16.el8_6.1 , < *
(rpm)
cpe:/a:redhat:rhel_aus:8.6::appstream cpe:/a:redhat:rhel_eus_long_life:8.6::appstream cpe:/o:redhat:rhel_aus:8.6::baseos cpe:/o:redhat:rhel_eus_long_life:8.6::baseos |
|
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On |
Unaffected:
0:4.15.5-16.el8_6.1 , < *
(rpm)
cpe:/a:redhat:rhel_aus:8.6::appstream cpe:/a:redhat:rhel_eus_long_life:8.6::appstream cpe:/o:redhat:rhel_aus:8.6::baseos cpe:/o:redhat:rhel_eus_long_life:8.6::baseos |
|
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service |
Unaffected:
0:4.17.5-7.el8_8.1 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:8.8::appstream cpe:/a:redhat:rhel_tus:8.8::appstream cpe:/o:redhat:rhel_e4s:8.8::baseos cpe:/o:redhat:rhel_tus:8.8::baseos |
|
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions |
Unaffected:
0:4.17.5-7.el8_8.1 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:8.8::appstream cpe:/a:redhat:rhel_tus:8.8::appstream cpe:/o:redhat:rhel_e4s:8.8::baseos cpe:/o:redhat:rhel_tus:8.8::baseos |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:4.23.5-10.el9_8 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9::appstream cpe:/a:redhat:enterprise_linux:9::crb cpe:/a:redhat:enterprise_linux:9::resilientstorage cpe:/o:redhat:enterprise_linux:9::baseos |
|
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions |
Unaffected:
0:4.17.5-105.el9_2.5 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.2::appstream cpe:/a:redhat:rhel_e4s:9.2::resilientstorage cpe:/o:redhat:rhel_e4s:9.2::baseos |
|
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions |
Unaffected:
0:4.19.4-105.el9_4.4 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.4::appstream cpe:/a:redhat:rhel_e4s:9.4::resilientstorage cpe:/o:redhat:rhel_e4s:9.4::baseos |
|
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
0:4.21.3-14.el9_6.1 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6::appstream cpe:/a:redhat:rhel_eus:9.6::crb cpe:/a:redhat:rhel_eus:9.6::resilientstorage cpe:/o:redhat:rhel_eus:9.6::baseos |
|
| Red Hat | Red Hat OpenShift Container Platform 4.12 |
Unaffected:
412.86.202608241157-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.12::el8 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.12 |
Unaffected:
412.86.202609082051-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.12::el8 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.13 |
Unaffected:
413.92.202609080414-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.13::el9 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.14 |
Unaffected:
414.92.202608172040-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.14::el9 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.14 |
Unaffected:
414.92.202609011250-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.14::el9 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.15 |
Unaffected:
415.92.202608180329-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.15::el9 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.16 |
Unaffected:
416.94.202608150307-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.16::el9 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.16 |
Unaffected:
416.94.202609011112-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.16::el9 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.17 |
Unaffected:
417.94.202608250221-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.17::el9 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.18 |
Unaffected:
418.94.202608142238-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.18::el9 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.18 |
Unaffected:
418.94.202609031320-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.18::el9 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.19 |
Unaffected:
4.19.9.6.202606241344-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.19::el9 |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4
|
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:4.19.4-16.el8_10 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 cpe:/o:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support |
Unaffected:
0:4.15.5-16.el8_6.1 , < *
(rpm)
cpe:/a:redhat:rhel_aus:8.6 |
|
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On |
Unaffected:
0:4.15.5-16.el8_6.1 , < *
(rpm)
cpe:/a:redhat:rhel_eus_long_life:8.6 |
|
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service |
Unaffected:
0:4.17.5-7.el8_8.1 , < *
(rpm)
cpe:/a:redhat:rhel_tus:8.8 |
|
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions |
Unaffected:
0:4.17.5-7.el8_8.1 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:8.8 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:4.23.5-10.el9_8 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 cpe:/o:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions |
Unaffected:
0:4.17.5-105.el9_2.5 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.2 |
|
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions |
Unaffected:
0:4.19.4-105.el9_4.4 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.4 |
|
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
0:4.21.3-14.el9_6.1 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.12 |
Unaffected:
412.86.202608241157-0 , < *
(rpm)
Unaffected: 412.86.202609082051-0 , < * (rpm) cpe:/a:redhat:openshift:4.12::el8 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.14 |
Unaffected:
414.92.202608172040-0 , < *
(rpm)
Unaffected: 414.92.202609011250-0 , < * (rpm) cpe:/a:redhat:openshift:4.14::el9 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.16 |
Unaffected:
416.94.202608150307-0 , < *
(rpm)
Unaffected: 416.94.202609011112-0 , < * (rpm) cpe:/a:redhat:openshift:4.16::el9 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.18 |
Unaffected:
418.94.202608142238-0 , < *
(rpm)
Unaffected: 418.94.202609031320-0 , < * (rpm) cpe:/a:redhat:openshift:4.18::el9 |
Date Public
2026-05-27 09:17
{
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"name": "RHSA-2026:62549",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2026:62549"
},
{
"name": "RHSA-2026:65839",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2026:65839"
},
{
"name": "RHSA-2026:65851",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2026:65851"
},
{
"name": "RHSA-2026:65907",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2026:65907"
},
{
"tags": [
"vdb-entry",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/security/cve/CVE-2026-3012"
},
{
"name": "RHBZ#2447319",
"tags": [
"issue-tracking",
"x_refsource_REDHAT"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2447319"
},
{
"url": "https://bugzilla.samba.org/show_bug.cgi?id=16003"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-03-13T12:55:02.623Z",
"value": "Reported to Red Hat."
},
{
"lang": "en",
"time": "2026-05-27T09:17:49.862Z",
"value": "Made public."
}
],
"title": "Samba: group policy certificate enrollment uses http:// without validation",
"workarounds": [
{
"lang": "en",
"value": "Systems are not affected unless Samba Group Policy processing and certificate auto-enrollment are explicitly enabled.\n\nAdministrators can reduce exposure by:\n\nAvoiding unnecessary use of certificate auto-enrollment.\nEnsuring your \"smb.conf\" does not contain a line like ```apply group policies = yes```. If , group policy is not be enabled, the vulnerable code will not run.\n\nIntercepting the HTTP request requires some control over the local network or other devices to intercept or redirect traffic. Some network administrators might assess this as a low risk on their\nnetworks."
}
],
"x_generator": {
"engine": "cvelib 1.8.0"
},
"x_redhatCweChain": "CWE-345: Insufficient Verification of Data Authenticity"
}
},
"cveMetadata": {
"assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
"assignerShortName": "redhat",
"cveId": "CVE-2026-3012",
"datePublished": "2026-05-27T10:02:21.767Z",
"dateReserved": "2026-02-23T07:08:58.479Z",
"dateUpdated": "2026-09-18T12:04:40.506Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
USN-8306-1 (UBUNTU-CVE-2026-1933)
Vulnerability from osv_ubuntu – Published: 2026-05-26 13:32 – Updated: 2026-06-09 19:00 – Source website
VLAI
Summary
samba vulnerabilities
Details
Asim Viladi Oglu Manizada discovered that Samba incorrectly handled access checks on reparse point operations. An attacker could possibly use this issue to modify reparse point extended attributes on files that should have been read-only. This issue only affected Ubuntu 25.10 and Ubuntu 26.04 LTS. (CVE-2026-1933)
Pavel Kohout discovered that Samba's vfs_worm module did not properly block file overwrites. An attacker could possibly use this issue to overwrite files that should have remained immutable. (CVE-2026-2340)
Arad Inbar, Nir Somech, and Ben Grinberg discovered that Samba incorrectly handled certificate auto-enrolment group policies over HTTP without verification. A machine-in-the-middle attacker could possibly use this issue to install a malicious CA certificate. This issue only affected Ubuntu 24.04 LTS, Ubuntu 25.10, and Ubuntu 26.04 LTS. (CVE-2026-3012)
Arad Inbar, Erez Cohen, Nir Somech, and Ben Grinberg discovered that Samba's Active Directory Domain Controller WINS server could be made to crash under certain circumstances. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2026-3238)
Ron Ben Yizhak discovered that Samba's DCE/RPC SAMR server incorrectly handled a non-default password check script configuration. A remote attacker could possibly use this issue to execute arbitrary code. (CVE-2026-4408)
Ron Ben Yizhak discovered that Samba's printing subsystem incorrectly handled a non-default print command configuration. A remote attacker could possibly use this issue to execute arbitrary code. (CVE-2026-4480)
References
{
"affected": [
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-2340",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-3238",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-4408",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-4480",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:22.04:LTS"
}
},
"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_name": "libsmbclient",
"binary_version": "2:4.15.13+dfsg-0ubuntu1.12"
},
{
"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_name": "registry-tools",
"binary_version": "2:4.15.13+dfsg-0ubuntu1.12"
},
{
"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"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "samba",
"purl": "pkg:deb/ubuntu/samba@2:4.15.13+dfsg-0ubuntu1.12?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2:4.15.13+dfsg-0ubuntu1.12"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
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"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"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-2340",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-3012",
"severity": [
{
"score": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-3238",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-4408",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-4480",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:24.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "ctdb",
"binary_version": "2:4.19.5+dfsg-4ubuntu9.6"
},
{
"binary_name": "ldb-tools",
"binary_version": "2:2.8.0+samba4.19.5+dfsg-4ubuntu9.6"
},
{
"binary_name": "libldb2",
"binary_version": "2:2.8.0+samba4.19.5+dfsg-4ubuntu9.6"
},
{
"binary_name": "libnss-winbind",
"binary_version": "2:4.19.5+dfsg-4ubuntu9.6"
},
{
"binary_name": "libpam-winbind",
"binary_version": "2:4.19.5+dfsg-4ubuntu9.6"
},
{
"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_name": "python3-samba",
"binary_version": "2:4.19.5+dfsg-4ubuntu9.6"
},
{
"binary_name": "registry-tools",
"binary_version": "2:4.19.5+dfsg-4ubuntu9.6"
},
{
"binary_name": "samba",
"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_version": "2:4.19.5+dfsg-4ubuntu9.6"
},
{
"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_name": "samba-dsdb-modules",
"binary_version": "2:4.19.5+dfsg-4ubuntu9.6"
},
{
"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_name": "samba-vfs-modules",
"binary_version": "2:4.19.5+dfsg-4ubuntu9.6"
},
{
"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_name": "winbind",
"binary_version": "2:4.19.5+dfsg-4ubuntu9.6"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "samba",
"purl": "pkg:deb/ubuntu/samba@2:4.19.5+dfsg-4ubuntu9.6?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2:4.19.5+dfsg-4ubuntu9.6"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
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"2:4.18.6+dfsg-1ubuntu2.1",
"2:4.18.6+dfsg-1ubuntu2.2",
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"2:4.19.5+dfsg-4ubuntu9.3",
"2:4.19.5+dfsg-4ubuntu9.4"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-1933",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
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"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-2340",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-3012",
"severity": [
{
"score": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-3238",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-4408",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-4480",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:25.10"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
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"binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
},
{
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"binary_version": "2:2.11.0+samba4.22.3+dfsg-4ubuntu2.4"
},
{
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"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_name": "libsmbclient0",
"binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
},
{
"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_name": "python3-ldb",
"binary_version": "2:2.11.0+samba4.22.3+dfsg-4ubuntu2.4"
},
{
"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_name": "samba-ad-provision",
"binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
},
{
"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_name": "samba-dsdb-modules",
"binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
},
{
"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_name": "samba-vfs-glusterfs",
"binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
},
{
"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_name": "smbclient",
"binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
},
{
"binary_name": "tdb-tools",
"binary_version": "2:1.4.13+samba4.22.3+dfsg-4ubuntu2.4"
},
{
"binary_name": "winbind",
"binary_version": "2:4.22.3+dfsg-4ubuntu2.4"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "samba",
"purl": "pkg:deb/ubuntu/samba@2:4.22.3+dfsg-4ubuntu2.4?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2:4.22.3+dfsg-4ubuntu2.4"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"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"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-1933",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-2340",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-3012",
"severity": [
{
"score": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-3238",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-4408",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-4480",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:26.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "ctdb",
"binary_version": "2:4.23.6+dfsg-1ubuntu2.1"
},
{
"binary_name": "ldb-tools",
"binary_version": "2:2.11.0+samba4.23.6+dfsg-1ubuntu2.1"
},
{
"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_name": "libsmbclient0",
"binary_version": "2:4.23.6+dfsg-1ubuntu2.1"
},
{
"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_name": "libwbclient0",
"binary_version": "2:4.23.6+dfsg-1ubuntu2.1"
},
{
"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_name": "python3-talloc",
"binary_version": "2:2.4.3+samba4.23.6+dfsg-1ubuntu2.1"
},
{
"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_name": "samba",
"binary_version": "2:4.23.6+dfsg-1ubuntu2.1"
},
{
"binary_name": "samba-ad-dc",
"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_version": "2:4.23.6+dfsg-1ubuntu2.1"
},
{
"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_name": "samba-libs",
"binary_version": "2:4.23.6+dfsg-1ubuntu2.1"
},
{
"binary_name": "samba-testsuite",
"binary_version": "2:4.23.6+dfsg-1ubuntu2.1"
},
{
"binary_name": "samba-vfs-ceph",
"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_version": "2:4.23.6+dfsg-1ubuntu2.1"
},
{
"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_name": "tdb-tools",
"binary_version": "2:1.4.14+samba4.23.6+dfsg-1ubuntu2.1"
},
{
"binary_name": "winbind",
"binary_version": "2:4.23.6+dfsg-1ubuntu2.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "samba",
"purl": "pkg:deb/ubuntu/samba@2:4.23.6+dfsg-1ubuntu2.1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2:4.23.6+dfsg-1ubuntu2.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"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"
]
}
],
"aliases": [],
"details": "Asim Viladi Oglu Manizada discovered that Samba incorrectly handled access\nchecks on reparse point operations. An attacker could possibly use this\nissue to modify reparse point extended attributes on files that should have\nbeen read-only. This issue only affected Ubuntu 25.10 and Ubuntu 26.04 LTS.\n(CVE-2026-1933)\n\nPavel Kohout discovered that Samba\u0027s vfs_worm module did not properly block\nfile overwrites. An attacker could possibly use this issue to overwrite\nfiles that should have remained immutable. (CVE-2026-2340)\n\nArad Inbar, Nir Somech, and Ben Grinberg discovered that Samba incorrectly\nhandled certificate auto-enrolment group policies over HTTP without\nverification. A machine-in-the-middle attacker could possibly use this\nissue to install a malicious CA certificate. This issue only affected\nUbuntu 24.04 LTS, Ubuntu 25.10, and Ubuntu 26.04 LTS. (CVE-2026-3012)\n\nArad Inbar, Erez Cohen, Nir Somech, and Ben Grinberg discovered that\nSamba\u0027s Active Directory Domain Controller WINS server could be made to\ncrash under certain circumstances. A remote attacker could possibly use\nthis issue to cause a denial of service. (CVE-2026-3238)\n\nRon Ben Yizhak discovered that Samba\u0027s DCE/RPC SAMR server incorrectly\nhandled a non-default password check script configuration. A remote\nattacker could possibly use this issue to execute arbitrary code.\n(CVE-2026-4408)\n\nRon Ben Yizhak discovered that Samba\u0027s printing subsystem incorrectly\nhandled a non-default print command configuration. A remote attacker could\npossibly use this issue to execute arbitrary code. (CVE-2026-4480)",
"id": "USN-8306-1",
"modified": "2026-06-09T19:00:59Z",
"published": "2026-05-26T13:32:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8306-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-1933"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-2340"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-3012"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-3238"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-4408"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-4480"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "samba vulnerabilities",
"upstream": [
"UBUNTU-CVE-2026-1933",
"UBUNTU-CVE-2026-2340",
"UBUNTU-CVE-2026-3012",
"UBUNTU-CVE-2026-3238",
"UBUNTU-CVE-2026-4408",
"UBUNTU-CVE-2026-4480"
]
}
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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