CVE-2023-6478

What it is

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.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account. High risk of data exposure.

Exploit odds

1.6% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2023-12-13 07:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-11-04 21:17 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 1.6% in the next 30 days (EPSS).
• Severity: 7.6 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2023-12-13 07:15 UTC

Last modified

2026-11-04 21:17 UTC

Exploit probability

1.6% · EPSS, next 30 days

Weakness

CWE-190 · Integer overflow

Record status

Modified

Affected

• x.org X Server < 21.1.10
• x.org Xwayland < 23.2.3
• Redhat Enterprise Linux Eus 9.2
• Debian Linux 10.0
• Debian Linux 11.0
• Debian Linux 12.0
• Tigervnc

Attack profile CVSS 3.1 · 7.6

Attack vector

Network

Complexity

Low

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

Low

Availability

Low

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2023-6478.md and follow it. Check whether this project is affected by CVE-2023-6478. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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