CVE-2026-3012
Publication date 26 May 2026
Last updated 2 June 2026
Ubuntu priority
Description
auto-enrolment GPO installing CA certificate over http without verification
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| samba | 26.04 LTS resolute |
Fixed 2:4.23.6+dfsg-1ubuntu2.1
|
| 25.10 questing |
Fixed 2:4.22.3+dfsg-4ubuntu2.4
|
|
| 24.04 LTS noble |
Fixed 2:4.19.5+dfsg-4ubuntu9.6
|
|
| 22.04 LTS jammy |
Not affected
|
|
| 20.04 LTS focal |
Not affected
|
|
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial |
Not affected
|
|
| 14.04 LTS trusty |
Not affected
|
Notes
mdeslaur
This only affects environments where Samba is used as a member in an Active Directory Domain, group policies are enabled on Samba, certificate auto-enrolment is enabled using the Windows GPME tool, and an attacker can intercept network communications.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
8.0 · High
|
| Attack vector | Adjacent |
| Attack complexity | High |
| Privileges required | None |
| User interaction | None |
| Scope | Changed |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | None |
| Vector | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N |
References
Related Ubuntu Security Notices (USN)
- USN-8306-1
- Samba vulnerabilities
- 26 May 2026