| 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, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-2869-1, DSA-5027-1 |
Vulnerable and fixed packages
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+deb10u10 | fixed |
| bullseye | 2:1.20.11-1+deb11u6 | fixed |
| bullseye (security) | 2:1.20.11-1+deb11u8 | fixed |
| bookworm, bookworm (security) | 2:21.1.7-3+deb12u2 | fixed |
| sid, trixie | 2:21.1.9-1 | fixed |
| xwayland (PTS) | bookworm | 2:22.1.9-1 | fixed |
| sid, trixie | 2:23.2.2-1 | fixed |
The information below is based on the following data on fixed versions.
Notes
https://lists.x.org/archives/xorg-announce/2021-December/003122.html
https://gitlab.freedesktop.org/xorg/xserver/-/commit/e56f61c79fc3cee26d83cda0f84ae56d5979f768