CVE-2023-1393 Use after free in xorg-server

What is CVE-2023-1393?

CVE-2023-1393 is a high-severity use after free vulnerability in Fedoraproject Fedora, published on 30 Mar 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Weakness: CWE-416

Which versions are affected by CVE-2023-1393?

It affects 2 products.

Products include Fedoraproject Fedora, X.org X Server.

How do I fix CVE-2023-1393?

Apply the vendor's patch.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2023-1393 being exploited?

There is no known exploitation of CVE-2023-1393 in the wild and no public exploit code.

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• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALSA-2023:1551, ALSA-2023:1592, ALSA-2023:6340, ALSA-2023:6341, ALSA-2023:6916, ALSA-2023:6917 and 33 more.