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CVE-2023-6478

19
FAUCET Score

CVE-2023-6478 is an integer overflow vulnerability in xorg-server, affecting products like Debian, Red Hat, Tigervnc, and X.Org. This flaw, rated 7.5 HIGH, allows an unauthenticated attacker to trigger an integer overflow via specially crafted requests to RRChangeProviderProperty or RRChangeOutputProperty, potentially leading to sensitive information disclosure. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 21.1.10CPE matchmatch criteria
cpe:2.3:a:x.org:x_server:*:*:*:*:*:*:*:*
< 23.2.3CPE matchmatch criteria
cpe:2.3:a:x.org:xwayland:*:*:*:*:*:*:*:*
9.2CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_eus:9.2:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
11.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.6HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
2.8
Impact Score
4.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.63%
Probability of exploitation in next 30 days
EPSS Percentile
73.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0163 is in the 56th percentile among its peer group of 51,551 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (22)

microsoftpatch availablevia msrc
Product: cbl2 xorg-x11-server 1.20.10-5 on CBL Mariner 2.0Fixed in: 1.20.10-5
microsoftpatch availablevia msrc
Product: 18226-16823Fixed in: 1.20.10-5
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: tigervnc-0:1.8.0-28.el7_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: xorg-x11-server-0:1.20.4-25.el7_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: tigervnc-0:1.13.1-2.el8_9.4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: xorg-x11-server-0:1.20.11-22.el8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: xorg-x11-server-Xwayland-0:21.1.3-15.el8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Advanced Update SupportFixed in: tigervnc-0:1.9.0-15.el8_2.6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Telecommunications Update ServiceFixed in: tigervnc-0:1.9.0-15.el8_2.6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Update Services for SAP SolutionsFixed in: tigervnc-0:1.9.0-15.el8_2.6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportFixed in: tigervnc-0:1.11.0-8.el8_4.5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Update Services for SAP SolutionsFixed in: tigervnc-0:1.11.0-8.el8_4.5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Extended Update SupportFixed in: tigervnc-0:1.12.0-6.el8_6.6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.8 Extended Update SupportFixed in: tigervnc-0:1.12.0-15.el8_8.4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: tigervnc-0:1.13.1-3.el9_3.3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: xorg-x11-server-0:1.20.11-24.el9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: xorg-x11-server-Xwayland-0:22.1.9-5.el9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.0 Extended Update SupportFixed in: tigervnc-0:1.11.0-22.el9_0.5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.2 Extended Update SupportFixed in: tigervnc-0:1.12.0-14.el9_2.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Telecommunications Update ServiceFixed in: tigervnc-0:1.11.0-8.el8_4.5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSIONFixed in: tigervnc-0:1.1.0-25.el6_10.13
View patch
redhatvendor investigatingvia nvd_reference
View patch

Vendor Advisories (2)

redhatCVE-2023-6478Important

xorg-x11-server: out-of-bounds memory read in RRChangeOutputProperty and RRChangeProviderProperty

Dec 13, 2023
microsoft2023-Dec/CVE-2023-6478Important

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

Dec 12, 2023

References

lists.debian.org / debian-lts-announce/2023/12/msg00008.html
lists.fedoraproject.org / archives/list/[email protected]/message/6R63Z6GIWM3YUNZRCGFODUXLW3GY2HD6
lists.fedoraproject.org / archives/list/[email protected]/message/7PP47YXKM5ETLCYEF6473R3VFCJ6QT2S
lists.fedoraproject.org / archives/list/[email protected]/message/IFHV5KCQ2SVOD4QMCPZ5HC6YL44L7YJD
lists.fedoraproject.org / archives/list/[email protected]/message/LJDFWDB7EQVZA45XDP7L5WRSRWS6RVRR
security.gentoo.org / glsa/202401-30
security.netapp.com / advisory/ntap-20240125-0003
debian.org / security/2023/dsa-5576
openwall.com / lists/oss-security/2023/12/13/1
access.redhat.com / errata/RHSA-2023:7886
Vendor Advisory
access.redhat.com / errata/RHSA-2024:0006
access.redhat.com / errata/RHSA-2024:0009
access.redhat.com / errata/RHSA-2024:0010
access.redhat.com / errata/RHSA-2024:0014
access.redhat.com / errata/RHSA-2024:0015
access.redhat.com / errata/RHSA-2024:0016
access.redhat.com / errata/RHSA-2024:0017
access.redhat.com / errata/RHSA-2024:0018
access.redhat.com / errata/RHSA-2024:0020
access.redhat.com / errata/RHSA-2024:2169
access.redhat.com / errata/RHSA-2024:2170
access.redhat.com / errata/RHSA-2024:2995
access.redhat.com / errata/RHSA-2024:2996
access.redhat.com / errata/RHSA-2025:12751
access.redhat.com / security/cve/CVE-2023-6478
Vendor Advisory
bugzilla.redhat.com / show_bug.cgi
Issue Tracking
gitlab.freedesktop.org / xorg/xserver/-/commit/14f480010a93ff962fef66a16412fafff81ad632
Patch
lists.x.org / archives/xorg-announce/2023-December/003435.html
Vendor Advisory