Description
Simple Desktop Display Manager (SDDM) before 0.10.0 allows local users to log in as user "sddm" without authentication.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | sddm | 0.11.0-2 | — |
| Debian 13 | sddm | 0.11.0-2 | — |
| Debian 12 | sddm | 0.11.0-2 | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | sddm | 0.14.0-2.1 | openSUSE-SU-2024:10135-1 |
Advisories 1
- openSUSE-SU-2024:10135-1 sddm-0.14.0-2.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- 70767 vdb-entry
- sddm-cve20147271-sec-bypass(98421) vdb-entry
- https://bugzilla.redhat.com/show_bug.cgi?id=1149608
- https://github.com/sddm/sddm/pull/279/files
- FEDORA-2014-12442 vendor-advisory
- FEDORA-2014-12308 vendor-advisory
- https://github.com/sddm/sddm/wiki/0.10.0-Release-Announcement
- [oss-security] 20141006 Re: various sddm vulnerabilities mailing-list