CVE-2023-1393
HIGHCVSS 7.8/10EPSS 0.44%
Last modified
CVE-2023-1393 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A flaw was found in X.Org Server Overlay Window. A Use-After-Free may lead to local privilege escalation. EPSS estimates a 0.44% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| X.Org | X Server | < 21.1.8 |
| Fedoraproject | Fedora | 36 |
| Fedoraproject | Fedora | 37 |
| Fedoraproject | Fedora | 38 |
References
- https://security.gentoo.org/glsa/202305-30Third Party Advisory
- https://www.openwall.com/lists/oss-security/2023/03/29/1Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202305-30Third Party Advisory
- https://www.openwall.com/lists/oss-security/2023/03/29/1Mailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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.
How severe is CVE-2023-1393?
CVE-2023-1393 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.44% probability of exploitation in the next 30 days.
How do I fix CVE-2023-1393?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2023-1393?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST