Description
KSmserver in KDE Plasma Workspace (aka plasma-workspace) before 5.27.11.1 and 6.x before 6.0.5.1 allows connections via ICE based purely on the host, i.e., all local connections are accepted. This allows another user on the same machine to gain access to the session manager, e.g., use the session-restore feature to execute arbitrary code as the victim (on the next boot) via earlier use of the /tmp directory.
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 | plasma-workspace | 4:5.27.11.1-1 | — |
| Debian 13 | plasma-workspace | 4:5.27.11.1-1 | — |
| Debian 12 | plasma-workspace | 4:5.27.5-2+deb12u2 | DSA-5723-1 |
| Debian 11 | plasma-workspace | 4:5.20.5-6+deb11u1 | DSA-5723-1 |
| Debian 10 | plasma-workspace | 4:5.14.5.1-1+deb10u1 | DLA-3827-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | plasma-workspace | 4:5.27.11-0ubuntu4.1 | USN-6843-1 |
| Ubuntu 22.04 LTS | plasma-workspace | 4:5.24.7-0ubuntu0.2 | USN-6843-1 |
| Ubuntu 20.04 LTS | plasma-workspace | 4:5.18.8-0ubuntu0.2 | USN-6843-1 |
| Ubuntu 18.04 LTS | plasma-workspace | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | plasma-workspace | 4:5.5.5.2-0ubuntu1.1+esm1 | USN-8829-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 15 SP6 | plasma5-workspace | 5.27.11-bp156.3.3.1 | openSUSE-SU-2024:0161-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.6 | plasma5-workspace | 5.27.11-bp156.3.3.1 | openSUSE-SU-2024:0161-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | plasma-workspace | 6.0.5.1-r0 | — |
| Alpine v3.23 | plasma-workspace | 6.0.5.1-r0 | — |
| Alpine v3.22 | plasma-workspace | 6.0.5.1-r0 | — |
| Alpine v3.21 | plasma-workspace | 6.0.5.1 | — |
| Alpine v3.20 | plasma-workspace | 6.0.5.1 | — |
Advisories 6
- USN-8829-1 plasma-workspace vulnerability Ubuntu Security Notices (USN) · Sep 28, 2026
- WID-SEC-2024-1266 KDE: Schwachstelle ermöglicht Ausführen von beliebigem Programmcode BSI CERT-Bund (WID) · Sep 28, 2026
- USN-6843-1 plasma-workspace vulnerability Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-5723-1 plasma-workspace - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3827-1 plasma-workspace - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:0161-1 Security update for plasma5-workspace SUSE / openSUSE Security Updates · Feb 4, 2026