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CVE-2023-5380

Published: 25 October 2023

A use-after-free flaw was found in the xorg-x11-server. An X server crash may occur in a very specific and legacy configuration (a multi-screen setup with multiple protocol screens, also known as Zaphod mode) if the pointer is warped from within a window on one screen to the root window of the other screen and if the original window is destroyed followed by another window being destroyed.

Notes

AuthorNote
mdeslaur
xorg server is actually the xorg-server package
the xorg package only contains docs
xwayland package contains parts of xorg-server
xwayland is not affected as it does not support multiple
protocol screens

Priority

Medium

Cvss 3 Severity Score

4.7

Score breakdown

Status

Package Release Status
xorg
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(code not present)
focal Not vulnerable
(code not present)
jammy Not vulnerable
(code not present)
lunar Not vulnerable
(code not present)
mantic Not vulnerable
(code not present)
noble Not vulnerable
(code not present)
trusty Ignored
(end of standard support)
upstream Needs triage

xenial Not vulnerable
(code not present)
xorg-hwe-16.04
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

jammy Does not exist

lunar Does not exist

mantic Does not exist

noble Does not exist

trusty Does not exist

upstream Not vulnerable

xenial Not vulnerable
(code not present)
xorg-hwe-18.04
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(code not present)
focal Does not exist

jammy Does not exist

lunar Does not exist

mantic Does not exist

noble Does not exist

trusty Does not exist

upstream Not vulnerable

xenial Does not exist

xorg-server
Launchpad, Ubuntu, Debian
bionic
Released (2:1.19.6-1ubuntu4.15+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
focal
Released (2:1.20.13-1ubuntu1~20.04.9)
jammy
Released (2:21.1.4-2ubuntu1.7~22.04.2)
lunar
Released (2:21.1.7-1ubuntu3.1)
mantic
Released (2:21.1.7-3ubuntu2.1)
noble
Released (2:21.1.7-3ubuntu2.1)
trusty
Released (2:1.15.1-0ubuntu2.11+esm8)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream
Released (21.1.9)
xenial
Released (2:1.18.4-0ubuntu0.12+esm6)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
Patches:
upstream: https://gitlab.freedesktop.org/xorg/xserver/-/commit/564ccf2ce9616620456102727acb8b0256b7bbd7
xorg-server-hwe-16.04
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

jammy Does not exist

lunar Does not exist

mantic Does not exist

noble Does not exist

trusty Does not exist

upstream Needs triage

xenial Needs triage

xorg-server-hwe-18.04
Launchpad, Ubuntu, Debian
bionic Needs triage

focal Does not exist

jammy Does not exist

lunar Does not exist

mantic Does not exist

noble Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

xorg-server-lts-utopic
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

jammy Does not exist

lunar Does not exist

mantic Does not exist

noble Does not exist

trusty Ignored
(end of standard support)
upstream Needs triage

xenial Does not exist

xorg-server-lts-vivid
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

jammy Does not exist

lunar Does not exist

mantic Does not exist

noble Does not exist

trusty Ignored
(end of standard support)
upstream Needs triage

xenial Does not exist

xorg-server-lts-wily
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

jammy Does not exist

lunar Does not exist

mantic Does not exist

noble Does not exist

trusty Ignored
(end of standard support)
upstream Needs triage

xenial Does not exist

xorg-server-lts-xenial
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

jammy Does not exist

lunar Does not exist

mantic Does not exist

noble Does not exist

trusty Ignored
(end of standard support)
upstream Needs triage

xenial Does not exist

xwayland
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

jammy Not vulnerable

lunar Not vulnerable

mantic Not vulnerable

noble Not vulnerable

trusty Does not exist

upstream Not vulnerable

xenial Does not exist

Severity score breakdown

Parameter Value
Base score 4.7
Attack vector Local
Attack complexity High
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H