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CRITICAL · 9.8

CVE-2023-6816

A flaw was found in X.Org server. Both DeviceFocusEvent and the XIQueryPointer reply contain a bit for each logical button currently down. Buttons can be arbitrarily mapped to any value up to 255, but...

Vulnerability Description

A flaw was found in X.Org server. Both DeviceFocusEvent and the XIQueryPointer reply contain a bit for each logical button currently down. Buttons can be arbitrarily mapped to any value up to 255, but the X.Org Server was only allocating space for the device's particular number of buttons, leading to a heap overflow if a bigger value was used.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
X.OrgX Server< 21.1.11
X.OrgXwayland< 23.2.4
FedoraprojectFedora39
RedhatEnterprise Linux Desktop7.0
RedhatEnterprise Linux Server7.0
RedhatEnterprise Linux Workstation7.0
DebianDebian Linux10.0

Related Weaknesses (CWE)

CWE-787

References

FAQ

What is CVE-2023-6816?

CVE-2023-6816 is a vulnerability with a CVSS score of 9.8 (CRITICAL). A flaw was found in X.Org server. Both DeviceFocusEvent and the XIQueryPointer reply contain a bit for each logical button currently down. Buttons can be arbitrarily mapped to any value up to 255, but...

How severe is CVE-2023-6816?

CVE-2023-6816 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2023-6816?

Check the references section above for vendor advisories and patch information. Affected products include: X.Org X Server, X.Org Xwayland, Fedoraproject Fedora, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server.