CVE-2026-4408
Publication date 26 May 2026
Last updated 27 May 2026
Ubuntu priority
Description
Unauthenticated Remote Code Execution in Samba DCE/RPC SAMR server
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 |
Fixed 2:4.15.13+dfsg-0ubuntu1.12
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
|
| 14.04 LTS trusty |
Needs evaluation
|
Notes
mdeslaur
This is a non-default configuration where the "check password script" configuration item needs to be configured with the "%u" substitution character. This is not the case on Ubuntu. In addition, the samba-dcerpcd service would need to be configured in a non-default way.
References
Related Ubuntu Security Notices (USN)
- USN-8306-1
- Samba vulnerabilities
- 26 May 2026