Use After Free in X.org X Server
CVE-2023-5574
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.
Vulnerability class: Use-After-Free
EPSS: 0.006 (45.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- X.org X_server
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9 — versions 0:1.13.1-8.el9
- Redhat Enterprise_linux — versions 7.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- RHSA-2024:2298 (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, Third Party Advisory, vdb-entry)
- RHBZ#2244735 (x_refsource_REDHAT, issue-tracking, Third Party Advisory, Issue Tracking)
- secalert@redhat.com (Patch, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2023-5574?
- CVE-2023-5574 is a high-severity vulnerability in X.org X Server, classified under Use After Free. CVSS score: 7.0/10. Published 2023-10-25.
- How severe is CVE-2023-5574?
- High severity. CVSS v3 base score is 7.0 out of 10.
- Is CVE-2023-5574 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.