Bug 2464388 (CVE-2026-31777)

Summary:	CVE-2026-31777 kernel: ALSA: ctxfi: Check the error for index mapping
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
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 ALSA ctxfi driver. The driver failed to properly validate the return value from the daio_device_index() function. This oversight could lead to the driver making incorrect assumptions, potentially causing system instability.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
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Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-05-01 15:03:55 UTC

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

ALSA: ctxfi: Check the error for index mapping

The ctxfi driver blindly assumed a proper value returned from
daio_device_index(), but it's not always true.  Add a proper error
check to deal with the error from the function.

Comment 1 Keith Grant 2026-05-01 23:26:38 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050150-CVE-2026-31777-20f9@gregkh/T