Bug 2467096 (CVE-2026-43184)

Summary:	CVE-2026-43184 kernel: rnbd-srv: Zero the rsp buffer before using it
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	unspecified	CC:	rhel-process-autobot, 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 `rnbd-srv` component. This vulnerability arises from the failure to properly clear the response buffer before sending data. A remote client could potentially receive unintended data, leading to information disclosure.	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 2026-05-06 13:04:03 UTC

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

rnbd-srv: Zero the rsp buffer before using it

Before using the data buffer to send back the response message, zero it
completely. This prevents any stray bytes to be picked up by the client
side when there the message is exchanged between different protocol
versions.

Comment 1 Keith Grant 2026-05-06 20:26:05 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050640-CVE-2026-43184-17d4@gregkh/T