CVE-2023-6478 Xorg-x11-server: out-of-bounds memory read in rrchangeoutputproperty and rrchangeproviderproperty

What is CVE-2023-6478?

CVE-2023-6478 is a high-severity vulnerability in Debian Debian Linux, published on 13 Dec 2023. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A flaw was found in xorg-server. A specially crafted request to RRChangeProviderProperty or RRChangeOutputProperty can trigger an integer overflow which may lead to a disclosure of sensitive information.

Weakness: CWE-190

Which versions are affected by CVE-2023-6478?

It affects 5 products.

Products include Debian Debian Linux, Redhat Enterprise Linux Eus, Tigervnc Tigervnc, X.org X Server, X.org Xwayland.

How do I fix CVE-2023-6478?

Apply the vendor's patch.

Is CVE-2023-6478 being exploited?

There is no known exploitation of CVE-2023-6478 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

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• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

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

Also known as AZL-32180, AZL-45192, BELL-CVE-2023-6478, DEBIAN-CVE-2023-6478, GHSA-fwrj-5c8f-f8h2, UBUNTU-CVE-2023-6478.