| Name | CVE-2025-49177 |
| Description | A flaw was found in the XFIXES extension. The XFixesSetClientDisconnectMode handler does not validate the request length, allowing a client to read unintended memory from previous requests. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-5947-1 |
| Debian Bugs | 1108369 |
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 | fixed |
| bullseye (security) | 2:1.20.11-1+deb11u16 | fixed |
| bookworm, bookworm (security) | 2:21.1.7-3+deb12u10 | fixed |
| trixie | 2:21.1.16-1.3 | fixed |
| forky, sid | 2:21.1.18-2 | fixed |
| xwayland (PTS) | bookworm | 2:22.1.9-1 | vulnerable |
| trixie | 2:24.1.6-1 | vulnerable |
| forky, sid | 2:24.1.8-1 | fixed |
The information below is based on the following data on fixed versions.
Notes
[bullseye] - xorg-server <not-affected> (Vulnerable code introduced later)
[trixie] - xwayland <ignored> (Minor issue; Xwayland shouldn't be running as root)
[bookworm] - xwayland <ignored> (Minor issue; Xwayland shouldn't be running as root)
Fixed by: https://gitlab.freedesktop.org/xorg/xserver/-/commit/ab02fb96b1c701c3bb47617d965522c34befa6af