CVE-2023-5574
highA use-after-free flaw was found in xorg-x11-server-Xvfb.
Vendor / product: X.org — x server
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.
CVSS
7.0
7.0 (CVSS v3.1)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2023-10-25 20:15
Modified: 2026-11-04 21:17
NVD status: Modified
Last synced 4 hours ago
Verified against the source API 2026-11-04 21:37 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
x.org / x_server ≥1.13.0
redhat / enterprise_linux 7.0
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://lists.x.org/archives/xorg-announce/2023-October/003430.html
Vendor advisory: https://lists.x.org/archives/xorg-announce/2023-October/003430.html
Patch / mitigation: https://lists.x.org/archives/xorg-announce/2023-October/003430.html
Patch / mitigation: https://lists.x.org/archives/xorg-announce/2023-October/003430.html
References
- https://access.redhat.com/errata/RHSA-2024:2298 secalert@redhat.com
- https://access.redhat.com/security/cve/CVE-2023-5574 secalert@redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2244735 secalert@redhat.com
- https://lists.x.org/archives/xorg-announce/2023-October/003430.html secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2024:2298 af854a3a-2127-422b-91ae-364da2661108
- https://access.redhat.com/security/cve/CVE-2023-5574 af854a3a-2127-422b-91ae-364da2661108
- https://bugzilla.redhat.com/show_bug.cgi?id=2244735 af854a3a-2127-422b-91ae-364da2661108
- https://lists.x.org/archives/xorg-announce/2023-October/003430.html af854a3a-2127-422b-91ae-364da2661108
- https://security.netapp.com/advisory/ntap-20231130-0004/ af854a3a-2127-422b-91ae-364da2661108
Data sources
NVD CVE API 2.0 — fetched 2026-11-04 21:37 UTC · record ↗