Bug 2554818 (CVE-2026-98439)

Summary:	CVE-2026-98439 kernel: smb/server: cancel async requests when closing connection
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, suppawar, vlaad, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in the Linux kernel's Server Message Block (SMB) server, ksmbd. When a connection is closed while an asynchronous request is still waiting, the server fails to cancel active requests before waiting for them to complete. A remote client could exploit this flaw to prevent the connection from closing, leading to a system hang or Denial of Service (DoS).	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:

Description OSIDB Bzimport 2026-10-18 14:51:18 UTC

In the Linux kernel, the following vulnerability has been resolved:

smb/server: cancel async requests when closing connection

An async request may still be waiting when a connection is closed.
This can stop the connection from closing.

Cancel active async requests before waiting for them to finish.