CVE-2023-6816

Xorg-x11-server: heap buffer overflow in devicefocusevent and procxiquerypointer

State: Published
Severity: 9.8 Critical
Published: Jan 18, 2024
Updated: Mar 19, 2026
Reserved: Dec 14, 2023

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.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	redhat

Weaknesses

CWE-787 Out-of-bounds Write

Affected Products

Product	Versions
Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSIONRed Hat	0:1.1.0-25.el6_10.13 and laterNot affected
Red Hat Enterprise Linux 7Red Hat	0:1.20.4-27.el7_9 and laterNot affected
Red Hat Enterprise Linux 7Red Hat	0:1.8.0-31.el7_9 and laterNot affected
Red Hat Enterprise Linux 8Red Hat	0:1.13.1-2.el8_9.7 and laterNot affected
Red Hat Enterprise Linux 8Red Hat	0:1.20.11-22.el8 and laterNot affected
Red Hat Enterprise Linux 8Red Hat	0:21.1.3-15.el8 and laterNot affected
Red Hat Enterprise Linux 8.2 Advanced Update SupportRed Hat	0:1.9.0-15.el8_2.9 and laterNot affected
Red Hat Enterprise Linux 8.2 Telecommunications Update ServiceRed Hat	0:1.9.0-15.el8_2.9 and laterNot affected
Red Hat Enterprise Linux 8.2 Update Services for SAP SolutionsRed Hat	0:1.9.0-15.el8_2.9 and laterNot affected
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRed Hat	0:1.11.0-8.el8_4.8 and laterNot affected
Red Hat Enterprise Linux 8.4 Telecommunications Update ServiceRed Hat	0:1.11.0-8.el8_4.8 and laterNot affected
Red Hat Enterprise Linux 8.4 Update Services for SAP SolutionsRed Hat	0:1.11.0-8.el8_4.8 and laterNot affected
Red Hat Enterprise Linux 8.6 Extended Update SupportRed Hat	0:1.12.0-6.el8_6.9 and laterNot affected
Red Hat Enterprise Linux 8.8 Extended Update SupportRed Hat	0:1.12.0-15.el8_8.7 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:1.13.1-3.el9_3.6 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:1.20.11-24.el9 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:22.1.9-5.el9 and laterNot affected
Red Hat Enterprise Linux 9.0 Extended Update SupportRed Hat	0:1.11.0-22.el9_0.8 and laterNot affected
Red Hat Enterprise Linux 9.2 Extended Update SupportRed Hat	0:1.12.0-14.el9_2.5 and laterNot affected
Red Hat Enterprise Linux 6Red Hat

References

RHSA-2024:0320vendor-advisory
RHSA-2024:0557vendor-advisory
RHSA-2024:0558vendor-advisory
RHSA-2024:0597vendor-advisory
RHSA-2024:0607vendor-advisory
RHSA-2024:0614vendor-advisory
RHSA-2024:0617vendor-advisory
RHSA-2024:0621vendor-advisory
RHSA-2024:0626vendor-advisory
RHSA-2024:0629vendor-advisory
RHSA-2024:2169vendor-advisory
RHSA-2024:2170vendor-advisory
RHSA-2024:2995vendor-advisory
RHSA-2024:2996vendor-advisory
RHSA-2025:12751vendor-advisory
https://access.redhat.com/security/cve/CVE-2023-6816vdb-entry
RHBZ#2257691issue-tracking
http://www.openwall.com/lists/oss-security/2024/01/18/1
https://lists.debian.org/debian-lts-announce/2024/01/msg00016.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5J4H7CH565ALSZZYKOJFYDA5KFLG6NUK/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EJBMCWQ54R6ZL3MYU2D2JBW6JMZL7BQW/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IZ75X54CN4IFYMIV7OK3JVZ57FHQIGIC/
https://security.gentoo.org/glsa/202401-30
https://security.netapp.com/advisory/ntap-20240307-0006/

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