Bug 2369955 (CVE-2025-49177)

Summary:	CVE-2025-49177 xorg-x11-server-Xwayland: xorg-x11-server: tigervnc: Data Leak in XFIXES Extension's XFixesSetClientDisconnectMode
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in the XFIXES extension. The XFixesSetClientDisconnectMode handler does not validate the request length, allowing a client to read unintended memory from previous requests.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2375561, 2375562, 2375563
Bug Blocks:
Deadline:	2025-06-17

Description OSIDB Bzimport 2025-06-03 07:29:04 UTC

Information Disclosure vulnerability in the XFIXES extension. Lack of request length validation in XFixesSetClientDisconnectMode allows clients to read residual data from previous requests.

Comment 4 errata-xmlrpc 2025-06-23 01:27:34 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2025:9304 https://access.redhat.com/errata/RHSA-2025:9304

Comment 5 errata-xmlrpc 2025-07-02 16:28:15 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Extended Update Support

Via RHSA-2025:10258 https://access.redhat.com/errata/RHSA-2025:10258