Skip to main content
MEDIUM

CVE-2023-5380

CVSS v3

4.7

MEDIUM

EPSS Score

0.7 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

Get an alert for each new CVE published for xorg-x11-server.

Set up CVE WatchFree account · no credit card

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 1.13.1-8.el9and 6 other packages
  • tigervncAlmaLinux:8all versions · fixed in 1.13.1-8.el8and 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

Vendor advisories

  • CVE-2023-5380 Red Hat Product Security505 products fixed · 24 known affected

    xorg-x11-server: Use-after-free bug in DestroyWindow

    tigervnc as a component of Red Hat Enterprise Linux 6 · tigervnc-server as a component of Red Hat Enterprise Linux 6 · tigervnc-server-applet as a component of Red Hat Enterprise Linux 6

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

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

  • RHSA-2024:3067 Red Hat Product Security40 products fixed

    Red Hat Security Advisory: tigervnc security update

  • RHSA-2024:2298 Red Hat Product Security40 products fixed

    Red Hat Security Advisory: tigervnc security update

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

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

  • RHSA-2023:7428 Red Hat Product Security52 products fixed

    Red Hat Security Advisory: tigervnc security update

Full record on NVD

Description

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.

Technical details

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

Frequently asked questions

What is CVE-2023-5380?

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.

Is CVE-2023-5380 actively exploited?

Active exploitation of CVE-2023-5380 has not been confirmed. Its EPSS score was 0.7% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-5380?

CVE-2023-5380 has a CVSS v3 base score of 4.7 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.

Running xorg-x11-server? Hear about its next vulnerability

CVE Watch matches each new CVE to the vendors and products you list (vendor and product, not the version) and puts it in your alerts with its KEV and EPSS status.

Get alerts for this productCISA KEV additions, October 2026Search CVEs

Already have an account? Open CVE WatchNo credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database