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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.006 (47.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 47.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.000
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
- Red Hat Enterprise Linux — versions 7.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- RHSA-2024:2298 (vendor-advisory)
- access.redhat.com/security/cve/CVE-2023-5574 (Third Party Advisory, vdb-entry)
- RHBZ#2244735 (issue-tracking, Third Party Advisory, Issue Tracking)
- lists.x.org/archives/xorg-announce/2023-October/003430.html (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.