| Name | CVE-2025-49179 |
| Description | A flaw was found in the X Record extension. The RecordSanityCheckRegisterClients function does not check for an integer overflow when computing request length, which allows a client to bypass length checks. |
| 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-4230-1, 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 | vulnerable |
| bullseye (security) | 2:1.20.11-1+deb11u16 | fixed |
| bookworm | 2:21.1.7-3+deb12u9 | vulnerable |
| bookworm (security) | 2:21.1.7-3+deb12u10 | fixed |
| sid, trixie | 2:21.1.16-1.3 | fixed |
| xwayland (PTS) | bookworm | 2:22.1.9-1 | vulnerable |
| sid, trixie | 2:24.1.6-1 | vulnerable |
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)
Fixed by: https://gitlab.freedesktop.org/xorg/xserver/-/commit/2bde9ca49a8fd9a1e6697d5e7ef837870d66f5d4