| Name | CVE-2026-109093 |
| Description | X.Org Server XTestFakeInput Valuator Stack Out-Of-Bounds Write |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1153675 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| xorg-server (PTS) | bookworm | 2:21.1.7-3+deb12u12 | vulnerable |
| bookworm (security) | 2:21.1.7-3+deb12u13 | vulnerable |
| trixie | 2:21.1.16-1.3+deb13u3 | vulnerable |
| trixie (security) | 2:21.1.16-1.3+deb13u4 | vulnerable |
| forky, sid | 2:21.1.25-2 | vulnerable |
| xwayland (PTS) | bookworm | 2:22.1.9-1 | vulnerable |
| trixie | 2:24.1.6-1 | vulnerable |
| forky, sid | 2:24.1.14-1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| xorg-server | source | (unstable) | (unfixed) | | | 1153675 |
| xwayland | source | (unstable) | (unfixed) | unimportant | | |
Notes
Xwayland shouldn't be running as root, cf. README.Debian.security
https://lists.x.org/archives/xorg-announce/2026-November/003759.html
Fixed by: https://gitlab.freedesktop.org/xorg/xserver/-/commit/99ce069ae814b39048543062e073320f14723ee0 (xorg-server-21.1.26)