Bug 2507052 (CVE-2026-64484)

Summary:	CVE-2026-64484 kernel: ALSA: es1938: 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:	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 ALSA (Advanced Linux Sound Architecture) es1938 sound driver. This vulnerability arises when a memory allocation failure causes the `snd_ctl_new1()` function to return a null value. The `snd_es1938_mixer()` function then attempts to use this null value without proper validation, leading to a null pointer dereference. This can result in a system crash, causing a Denial of Service (DoS) for affected systems.	Story Points:	---
Clone Of:		Environment:
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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 2026-07-25 10:02:30 UTC

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

ALSA: es1938: check snd_ctl_new1() return value

snd_ctl_new1() can return NULL when memory allocation fails.
snd_es1938_mixer() does not check the return value before dereferencing
the pointer, which can lead to a NULL pointer dereference.

Add a NULL check after snd_ctl_new1() and return -ENOMEM if it fails.

Comment 1 Mauro Matteo Cascella 2026-07-29 18:15:00 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026072548-CVE-2026-64484-adbc@gregkh/T