Bug 2507155 (CVE-2026-64486)

Summary:	CVE-2026-64486 kernel: ALSA: cmipci: check snd_ctl_new1() return value
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
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 Advanced Linux Sound Architecture (ALSA) cmipci component. This vulnerability occurs because the `snd_cmipci_spdif_controls()` function fails to check the return value of `snd_ctl_new1()`, which can return a null pointer if memory allocation fails. A local attacker could exploit this to trigger a null pointer dereference, leading to a system crash and a 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 2026-07-25 10:07:57 UTC

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

ALSA: cmipci: check snd_ctl_new1() return value

snd_ctl_new1() can return NULL when memory allocation fails.
snd_cmipci_spdif_controls() does not check the return value before
dereferencing kctl->id.device, which can lead to a NULL pointer
dereference.

Add NULL checks after snd_ctl_new1() calls and return -ENOMEM if any
fails.

Comment 1 TEJ RATHI 2026-07-29 14:48:49 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026072549-CVE-2026-64486-a656@gregkh/T