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HIGH

CVE-2023-5367

CVSS v3

7.8

HIGH

EPSS Score

0.6 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • tigervncAlmaLinux:9all versions · fixed in 1.13.1-3.el9_3.3.alma.1and 6 other packages
  • xorg-x11-server-XdmxAlmaLinux:9all versions · fixed in 1.20.11-24.el9and 7 other packages
  • xorg-x11-server-XdmxAlmaLinux:8all versions · fixed in 1.20.11-22.el8and 7 other packages
  • xorg-x11-server-XwaylandAlmaLinux:9all versions · fixed in 22.1.9-5.el9
  • xorg-x11-server-XwaylandAlmaLinux:8all versions · fixed in 21.1.3-15.el8

Vendor advisories

  • CVE-2023-5367 Red Hat Product Security742 products fixed · 9 known affected

    xorg-x11-server: Out-of-bounds write in XIChangeDeviceProperty/RRChangeOutputProperty

    xorg-x11-server-Xdmx as a component of Red Hat Enterprise Linux 6 · xorg-x11-server-Xephyr as a component of Red Hat Enterprise Linux 6 · xorg-x11-server-Xnest as a component of Red Hat Enterprise Linux 6

  • RHSA-2025:12751 Red Hat Product Security15 products fixed

    Red Hat Security Advisory: tigervnc security update

  • RHSA-2024:2996 Red Hat Product Security13 products fixed

    Red Hat Security Advisory: xorg-x11-server-Xwayland security update

  • RHSA-2024:2995 Red Hat Product Security94 products fixed

    Red Hat Security Advisory: xorg-x11-server security update

  • RHSA-2024:2169 Red Hat Product Security94 products fixed

    Red Hat Security Advisory: xorg-x11-server security update

  • RHSA-2024:2170 Red Hat Product Security13 products fixed

    Red Hat Security Advisory: xorg-x11-server-Xwayland security update

11 more advisories

Full record on NVD

Description

A out-of-bounds write flaw was found in the xorg-x11-server. This issue occurs due to an incorrect calculation of a buffer offset when copying data stored in the heap in the XIChangeDeviceProperty function in Xi/xiproperty.c and in RRChangeOutputProperty function in randr/rrproperty.c, allowing for possible escalation of privileges or denial of service.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2023-10-25
Last Modified
2026-06-23

Frequently asked questions

What is CVE-2023-5367?

A out-of-bounds write flaw was found in the xorg-x11-server. This issue occurs due to an incorrect calculation of a buffer offset when copying data stored in the heap in the XIChangeDeviceProperty function in Xi/xiproperty.c and in RRChangeOutputProperty function in randr/rrproperty.c, allowing for possible escalation of privileges or denial of service.

Is CVE-2023-5367 actively exploited?

Active exploitation of CVE-2023-5367 has not been confirmed. Its EPSS score was 0.6% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-5367?

CVE-2023-5367 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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