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Vulnerability · Published Dec 14, 2022 · Assigned by redhat

CVE-2022-46340

High 8.8

In plain English

A high-severity out-of-bounds write in xorg-x11-server. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.7% (higher than 86% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.8High
Exploit odds (30 days)2.7%top 14.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A vulnerability was found in X.Org. This security flaw occurs becuase the swap handler for the XTestFakeInput request of the XTest extension may corrupt the stack if GenericEvents with lengths larger than 32 bytes are sent through a the XTestFakeInput request. 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. This issue does not affect systems where client and server use the same byte order.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8tigervnc1.12.0-15.el8_8ALSA-2023:2830
AlmaLinux:9tigervnc1.12.0-13.el9_2ALSA-2023:2257
AlmaLinux:8tigervnc-icons1.12.0-15.el8_8ALSA-2023:2830
AlmaLinux:9tigervnc-icons1.12.0-13.el9_2ALSA-2023:2257
AlmaLinux:8tigervnc-license1.12.0-15.el8_8ALSA-2023:2830
AlmaLinux:9tigervnc-license1.12.0-13.el9_2ALSA-2023:2257
AlmaLinux:8tigervnc-selinux1.12.0-15.el8_8ALSA-2023:2830
AlmaLinux:9tigervnc-selinux1.12.0-13.el9_2ALSA-2023:2257
AlmaLinux:8tigervnc-server1.12.0-15.el8_8ALSA-2023:2830
AlmaLinux:9tigervnc-server1.12.0-13.el9_2ALSA-2023:2257
AlmaLinux:8tigervnc-server-minimal1.12.0-15.el8_8ALSA-2023:2830
AlmaLinux:9tigervnc-server-minimal1.12.0-13.el9_2ALSA-2023:2257
AlmaLinux:8tigervnc-server-module1.12.0-15.el8_8ALSA-2023:2830
AlmaLinux:9tigervnc-server-module1.12.0-13.el9_2ALSA-2023:2257
AlmaLinux:8xorg-x11-server-Xdmx1.20.11-15.el8ALSA-2023:2806
AlmaLinux:9xorg-x11-server-Xdmx1.20.11-17.el9ALSA-2023:2248
AlmaLinux:8xorg-x11-server-Xephyr1.20.11-15.el8ALSA-2023:2806
AlmaLinux:9xorg-x11-server-Xephyr1.20.11-17.el9ALSA-2023:2248
AlmaLinux:8xorg-x11-server-Xnest1.20.11-15.el8ALSA-2023:2806
AlmaLinux:9xorg-x11-server-Xnest1.20.11-17.el9ALSA-2023:2248
AlmaLinux:8xorg-x11-server-Xorg1.20.11-15.el8ALSA-2023:2806
AlmaLinux:9xorg-x11-server-Xorg1.20.11-17.el9ALSA-2023:2248
AlmaLinux:8xorg-x11-server-Xvfb1.20.11-15.el8ALSA-2023:2806
AlmaLinux:9xorg-x11-server-Xvfb1.20.11-17.el9ALSA-2023:2248
AlmaLinux:8xorg-x11-server-Xwayland21.1.3-10.el8ALSA-2023:2805
AlmaLinux:9xorg-x11-server-Xwayland21.1.3-7.el9ALSA-2023:2249
AlmaLinux:8xorg-x11-server-common1.20.11-15.el8ALSA-2023:2806
AlmaLinux:9xorg-x11-server-common1.20.11-17.el9ALSA-2023:2248
AlmaLinux:8xorg-x11-server-devel1.20.11-15.el8ALSA-2023:2806
AlmaLinux:9xorg-x11-server-devel1.20.11-17.el9ALSA-2023:2248
AlmaLinux:8xorg-x11-server-source1.20.11-15.el8ALSA-2023:2806
AlmaLinux:9xorg-x11-server-source1.20.11-17.el9ALSA-2023:2248
Alpine:v3.20xorg-server21.1.5-r0ALPINE-CVE-2022-46340
Alpine:v3.21xorg-server21.1.5-r0ALPINE-CVE-2022-46340
Alpine:v3.22xorg-server21.1.5-r0ALPINE-CVE-2022-46340
Alpine:v3.23xorg-server21.1.5-r0ALPINE-CVE-2022-46340
Alpine:v3.24xorg-server21.1.5-r0ALPINE-CVE-2022-46340
Alpine:v3.20xwayland22.1.6-r0ALPINE-CVE-2022-46340
Alpine:v3.21xwayland22.1.6-r0ALPINE-CVE-2022-46340
Alpine:v3.22xwayland22.1.6-r0ALPINE-CVE-2022-46340
Alpine:v3.23xwayland22.1.6-r0ALPINE-CVE-2022-46340
Alpine:v3.24xwayland22.1.6-r0ALPINE-CVE-2022-46340
Debian:12xorg-server2:21.1.5-1DEBIAN-CVE-2022-46340
Debian:13xorg-server2:21.1.5-1DEBIAN-CVE-2022-46340
Debian:14xorg-server2:21.1.5-1DEBIAN-CVE-2022-46340
Debian:12xwayland2:22.1.6-1DEBIAN-CVE-2022-46340
Debian:13xwayland2:22.1.6-1DEBIAN-CVE-2022-46340
Debian:14xwayland2:22.1.6-1DEBIAN-CVE-2022-46340
Ubuntu:22.04:LTSxorg-server2:21.1.3-2ubuntu2.5USN-5778-1
Ubuntu:22.04:LTSxorg-server2:21.1.3-2ubuntu2.5UBUNTU-CVE-2022-46340
Ubuntu:22.04:LTSxwayland2:22.1.1-1ubuntu0.4UBUNTU-CVE-2022-46340
Ubuntu:22.04:LTSxwayland2:22.1.1-1ubuntu0.4USN-5778-1

Affected products (as reported)

VendorProductVersions
n/a xorg-x11-server xorg-x11-server-1.20.4

Weakness: CWE-787 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References