| Name | CVE-2025-26597 |
| Description | A buffer overflow flaw was found in X.Org and Xwayland. If XkbChangeTypesOfKey() is called with a 0 group, it will resize the key symbols table to 0 but leave the key actions unchanged. If the same function is later called with a non-zero value of groups, this will cause a buffer overflow because the key actions are of the wrong size. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-4072-1, DSA-5872-1 |
| Debian Bugs | 1098906, 1098907 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| xorg-server (PTS) | bullseye | 2:1.20.11-1+deb11u13 | vulnerable |
| bullseye (security) | 2:1.20.11-1+deb11u16 | fixed |
| bookworm, bookworm (security) | 2:21.1.7-3+deb12u10 | fixed |
| forky, trixie | 2:21.1.16-1.3 | fixed |
| sid | 2:21.1.18-2 | fixed |
| xwayland (PTS) | bookworm | 2:22.1.9-1 | vulnerable |
| trixie | 2:24.1.6-1 | fixed |
| forky, sid | 2:24.1.8-1 | fixed |
The information below is based on the following data on fixed versions.
Notes
[bookworm] - xwayland <ignored> (Minor issue; Xwayland shouldn't be running as root)
https://lists.x.org/archives/xorg-announce/2025-February/003584.html
Fixed by: https://gitlab.freedesktop.org/xorg/xserver/-/commit/0e4ed94952b255c04fe910f6a1d9c852878dcd64