| Name | CVE-2022-4283 |
| Description | A vulnerability was found in X.Org. This security flaw occurs because the XkbCopyNames function left a dangling pointer to freed memory, resulting in out-of-bounds memory access on subsequent XkbGetKbdByName requests.. This issue can lead to local privileges elevation on systems where the X server is running privileged and remote code execution for ssh X forwarding sessions. |
| 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-3256-1, DSA-5304-1 |
| Debian Bugs | 1026071 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| xorg-server (PTS) | buster | 2:1.20.4-1+deb10u4 | vulnerable |
| buster (security) | 2:1.20.4-1+deb10u9 | fixed | |
| bullseye (security), bullseye | 2:1.20.11-1+deb11u6 | fixed | |
| bookworm | 2:21.1.7-3 | fixed | |
| sid, trixie | 2:21.1.8-1 | fixed | |
| xwayland (PTS) | bookworm | 2:22.1.9-1 | fixed |
| sid, trixie | 2:23.2.1-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| xorg-server | source | buster | 2:1.20.4-1+deb10u7 | DLA-3256-1 | ||
| xorg-server | source | bullseye | 2:1.20.11-1+deb11u4 | DSA-5304-1 | ||
| xorg-server | source | (unstable) | 2:21.1.5-1 | 1026071 | ||
| xwayland | source | (unstable) | 2:22.1.6-1 |
https://lists.x.org/archives/xorg-announce/2022-December/003302.html
https://gitlab.freedesktop.org/xorg/xserver/commit/ccdd431cd8f1cabae9d744f0514b6533c438908c