Use After Free in X.org X Server
CVE-2023-1393
A flaw was found in X.Org Server Overlay Window. A Use-After-Free may lead to local privilege escalation. If a client explicitly destroys the compositor overlay window (aka COW), the Xserver would leave a dangling pointer to that window in the CompScreen structure, which will trigger a use-after-free later.
Vulnerability class: Use-After-Free
EPSS: 0.004 (36.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- X.org X_server
- Fedoraproject Fedora — versions 36, 37, 38
- N/a Xorg-server — versions xorg-server 21.1.8
Weakness classification (CWE)
References
- secalert@redhat.com (Mailing List, Third Party Advisory)
- secalert@redhat.com (vendor-advisory)
- secalert@redhat.com (vendor-advisory)
- secalert@redhat.com (vendor-advisory)
- secalert@redhat.com (vendor-advisory)
- secalert@redhat.com (vendor-advisory)
- secalert@redhat.com (vendor-advisory)
- secalert@redhat.com (vendor-advisory)
- secalert@redhat.com (vendor-advisory)
- secalert@redhat.com (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-1393?
- CVE-2023-1393 is a high-severity vulnerability in X.org X Server, classified under Use After Free. CVSS score: 7.8/10. Published 2023-03-30.
- How severe is CVE-2023-1393?
- High severity. CVSS v3 base score is 7.8 out of 10.