Xorg-x11-server: use-after-free bug in damagedestroy

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Summary

CVECVE-2023-5574
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-10-25 20:15:18 UTC
Updated2026-06-23 18:17:37 UTC
DescriptionA use-after-free flaw was found in xorg-x11-server-Xvfb. This issue occurs in Xvfb with 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 a screen 1 to a screen 0, a use-after-free issue may be triggered during shutdown or reset of the Xvfb server, allowing for possible escalation of privileges or denial of service.

Risk And Classification

Primary CVSS: v3.1 7 HIGH from [email protected]

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.005360000 probability, percentile 0.411340000 (date 2026-06-28)

Problem Types: CWE-416 | CWE-416 Use After Free

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1[email protected]Secondary7HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNACVSS7HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Redhat Enterprise Linux 7.0 All All All
Application X.org X Server All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Red Hat Red Hat Enterprise Linux 9 unaffected 0:1.13.1-8.el9 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 6 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 6 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 7 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 7 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 8 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 8 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 8 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 9 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 9 Not specified Not specified

References

ReferenceSourceLinkTags
X.Org Security Advisory: Issues in X.Org X server prior to 21.1.9 and Xwayland prior to 23.2.2 af854a3a-2127-422b-91ae-364da2661108 lists.x.org Patch, Vendor Advisory
security.netapp.com/advisory/ntap-20231130-0004 af854a3a-2127-422b-91ae-364da2661108 security.netapp.com
2244735 – (CVE-2023-5574) CVE-2023-5574 xorg-x11-server: Use-after-free bug in DamageDestroy af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com Issue Tracking, Third Party Advisory
access.redhat.com/errata/RHSA-2024:2298 af854a3a-2127-422b-91ae-364da2661108 access.redhat.com
cve-details af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

SourceTimeEvent
CNA2023-10-17T00:00:00.000ZReported to Red Hat.
CNA2023-10-25T00:00:00.000ZMade public.

Workarounds

CNA: Starting Xvfb with the -noreset command line option limits the use-after-free from being triggered only at the Xvfb server shutdown. Also, do not start Xvfb as root.

Legacy QID Mappings

  • 296108 Oracle Solaris 11.4 Support Repository Update (SRU) 66.164.1 Missing (CPUJAN2024)
  • 356766 Amazon Linux Security Advisory for xorg-x11-server : ALAS2-2023-2352
  • 356784 Amazon Linux Security Advisory for xorg-x11-server : ALAS-2023-1892
  • 356904 Amazon Linux Security Advisory for xorg-x11-server : ALAS2023-2023-444
  • 356994 Amazon Linux Security Advisory for xorg-x11-server : AL2012-2023-478
  • 503445 Alpine Linux Security Update for xorg-server
  • 506278 Alpine Linux Security Update for xorg-server
  • 755188 SUSE Enterprise Linux Security Update for xorg-x11-server (SUSE-SU-2023:4272-1)
  • 755191 SUSE Enterprise Linux Security Update for xorg-x11-server (SUSE-SU-2023:4269-1)
  • 755198 SUSE Enterprise Linux Security Update for xwayland (SUSE-SU-2023:4306-1)
  • 755203 SUSE Enterprise Linux Security Update for xwayland (SUSE-SU-2023:4293-1)
  • 755204 SUSE Enterprise Linux Security Update for xorg-x11-server (SUSE-SU-2023:4292-1)
  • 755217 SUSE Enterprise Linux Security Update for xorg-x11-server (SUSE-SU-2023:4338-1)

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