Vulnerabilities
Misconfiguration
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CVE Vulnerabilities

CVE-2022-46343

Use After Free

Published: Dec 14, 2022 | Modified: Apr 22, 2025
CVSS 3.x
8.8
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
RedHat/V2
RedHat/V3
8.8 IMPORTANT
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2022-46343
CWEhttps://cwe.mitre.org/data/definitions/416.html

A vulnerability was found in X.Org. This security flaw occurs because the handler for the ScreenSaverSetAttributes request may write to memory after it has been freed. 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.

Weakness

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

NameVendorStart VersionEnd Version
X_serverX.org1.20.4 (including)1.20.4 (including)
Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSIONRedHattigervnc-0:1.1.0-25.el6_10.13*
Red Hat Enterprise Linux 7RedHattigervnc-0:1.8.0-23.el7_9*
Red Hat Enterprise Linux 7RedHatxorg-x11-server-0:1.20.4-21.el7_9*
Red Hat Enterprise Linux 8RedHatxorg-x11-server-Xwayland-0:21.1.3-10.el8*
Red Hat Enterprise Linux 8RedHatxorg-x11-server-0:1.20.11-15.el8*
Red Hat Enterprise Linux 8RedHattigervnc-0:1.12.0-15.el8_8*
Red Hat Enterprise Linux 9RedHatxorg-x11-server-0:1.20.11-17.el9*
Red Hat Enterprise Linux 9RedHatxorg-x11-server-Xwayland-0:21.1.3-7.el9*
Red Hat Enterprise Linux 9RedHattigervnc-0:1.12.0-13.el9_2*
Xorg-serverUbuntubionic*
Xorg-serverUbuntudevel*
Xorg-serverUbuntuesm-infra-legacy/trusty*
Xorg-serverUbuntuesm-infra/bionic*
Xorg-serverUbuntuesm-infra/focal*
Xorg-serverUbuntuesm-infra/xenial*
Xorg-serverUbuntufocal*
Xorg-serverUbuntujammy*
Xorg-serverUbuntukinetic*
Xorg-serverUbuntulunar*
Xorg-serverUbuntutrusty*
Xorg-serverUbuntutrusty/esm*
Xorg-serverUbuntuxenial*
Xorg-server-hwe-16.04Ubuntuesm-infra/xenial*
Xorg-server-hwe-16.04Ubuntuxenial*
Xorg-server-hwe-18.04Ubuntubionic*
Xorg-server-hwe-18.04Ubuntuesm-infra/bionic*
Xorg-server-lts-utopicUbuntutrusty*
Xorg-server-lts-vividUbuntutrusty*
Xorg-server-lts-wilyUbuntutrusty*
Xorg-server-lts-xenialUbuntutrusty*
XwaylandUbuntudevel*
XwaylandUbuntujammy*
XwaylandUbuntukinetic*
XwaylandUbuntulunar*

Potential Mitigations

References

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