Description
dmrc.c in Light Display Manager (aka LightDM) before 1.1.1 allows local users to read arbitrary files via a symlink attack on ~/.dmrc.
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 | lightdm | 1.0.6-2 | — |
| Debian 13 | lightdm | 1.0.6-2 | — |
| Debian 12 | lightdm | 1.0.6-2 | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | lightdm | 1.21.1-1.1 | openSUSE-SU-2024:10033-1 |
Advisories 1
- openSUSE-SU-2024:10033-1 liblightdm-gobject-1-0-1.21.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026