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CVE-2025-49178

Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: unprocessed client request due to bytes to ignore

Published: Jun 17, 2025Updated: Dec 11, 2025 Sources: CVE List NVD BDUCWE-667
NVD MITRE
5.5CVSSMEDIUM
EPSS Score
0.2%
Top 90.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

A flaw was found in the X server's request handling. Non-zero 'bytes to ignore' in a client's request can cause the server to skip processing another client's request, potentially leading to a denial of service.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:NI:NA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-667

Affected Products

xwaylandX.Org
On-prem
Operating Systems / linux-distro
Red Hat Enterprise Linux 10Red Hat
On-premOS
Operating Systems / linux-distro
Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSIONRed Hat
On-premOS
Operating Systems / linux-distro
Red Hat Enterprise Linux 7.7 Advanced Update SupportRed Hat
On-prem
Operating Systems / linux-distro
Red Hat Enterprise Linux 7 Extended Lifecycle SupportRed Hat
On-premOS
Operating Systems / linux-distro
x.orgoss-projectUSOperating Systems
red hatcommercialUSOperating Systemsaka red hat
and 22 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
Privilege Escalation
View detailed technique mapping

References

https://access.redhat.com/errata/RHSA-2025:10258
access.redhat.com
https://access.redhat.com/errata/RHSA-2025:10342
access.redhat.com
https://access.redhat.com/errata/RHSA-2025:10343
access.redhat.com
and 44 more references View all →

Timeline

Published
Jun 17, 2025
Last Updated
Dec 11, 2025

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