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Back to active CVEs
High · CVSS 7.0CVE-2023-5574

Xorg-x11-server: use-after-free bug in damagedestroyCVE-2023-5574

Answer in brief

CVE-2023-5574 records a High severity (CVSS 7.0) vulnerability in Xorg-x11-server: use-after-free bug in damagedestroy. The current sources do not mark it as known exploited. The current feed maps Red Hat/xorg-x11-server (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 25, 2023Updated Jul 11, 2026Source checked Nov 4, 2026First seen by HOL Jun 23, 2026Material review Jul 11, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.0
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 7.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Red Hat/xorg-x11-server (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Red Hat/xorg-x11-servergeneric*Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Red Hat/xorg-x11-server.
  2. 2Review the reported fix. Source-reported workaround: 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.

Evidence timeline and material changes

  1. Published upstream

    Oct 25, 2023

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Jul 11, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Jun 23, 2026

Sources and claim methodology

  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referencebugzilla.redhat.com
  • Source referencelists.x.org
  • Source referencesecurity.netapp.com
Upstream source description

A 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.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Memory Corruption
EPSS
Not reported
CWE IDs
CWE-416
Source
CVE List V5
Source checked
Nov 4, 2026
References
5 linked sources
Open source record