| Name | CVE-2021-4011 |
| Description | A flaw was found in xorg-x11-server in versions before 21.1.2 and before 1.20.14. An out-of-bounds access can occur in the SwapCreateRegister function. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more) |
| References | DLA-2869-1, DSA-5027-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| xorg-server (PTS) | buster | 2:1.20.4-1+deb10u4 | fixed |
| buster (security) | 2:1.20.4-1+deb10u9 | fixed | |
| bullseye (security), bullseye | 2:1.20.11-1+deb11u6 | fixed | |
| bookworm, sid | 2:21.1.7-3 | fixed | |
| xwayland (PTS) | bookworm, sid | 2:22.1.9-1 | 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 | stretch | 2:1.19.2-1+deb9u9 | DLA-2869-1 | ||
| xorg-server | source | buster | 2:1.20.4-1+deb10u4 | DSA-5027-1 | ||
| xorg-server | source | bullseye | 2:1.20.11-1+deb11u1 | DSA-5027-1 | ||
| xorg-server | source | (unstable) | 2:1.20.13-3 | |||
| xwayland | source | (unstable) | 2:21.1.4-1 |
https://lists.x.org/archives/xorg-announce/2021-December/003122.html
https://gitlab.freedesktop.org/xorg/xserver/-/commit/e56f61c79fc3cee26d83cda0f84ae56d5979f768