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CVE-2025-49179

Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: integer overflow in x record extension

Published: Jun 17, 2025Updated: Dec 11, 2025 Sources: CVE List NVD BDUCWE-190
NVD MITRE
7.3CVSSHIGH
EPSS Score
0.3%
Top 80.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

A flaw was found in the X Record extension. The RecordSanityCheckRegisterClients function does not check for an integer overflow when computing request length, which allows a client to bypass length checks.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:HI:LA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:LIntegrity
Low
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-190

Affected Products

Red Hat Enterprise LinuxRed Hat Inc.
On-premOS
Operating Systems / linux-distro
Astra Linux Special EditionООО «РусБИТех-Астра»
On-premOS
Operating Systems / linux-distro
РОСА ХРОМАО «НТЦ ИТ РОСА»
On-prem
Operating Systems / linux-distro
Xorg-serverX.Org Foundation
On-prem
Operating Systems / unix-bsd
XWaylandСообщество свободного программного обеспечения
On-prem
Operating Systems / linux-distro
red hat inc.commercialUSOperating Systemsaka red hat
ооо «русбитех-астра»commercialRUOperating Systemsaka rusbitech-astra
ао «нтц ит роса»commercialRUOperating Systems
x.org foundationoss-projectUSOperating Systemsaka xorg-server, xlib, libx11
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
and 23 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available
Workaround Available

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://linuxsecurity.com/news/security-vulnerabilities/critical-flaws-x-org-xwayland
linuxsecurity.com
https://insinuator.net/2025/06/disclosure-multiple-vulnerabilities-xserver-xwayland/
insinuator.net
https://opennet.ru/opennews/art.shtml?num=63423
opennet.ru
and 41 more references View all →

Timeline

Published
Jun 17, 2025
Last Updated
Dec 11, 2025

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