Bug 2396390 (CVE-2023-53400)

Summary:	CVE-2023-53400 kernel: Linux kernel: ALSA HDA denial of service via array overflow
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	Keywords:	Security
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Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in the Linux kernel's Advanced Linux Sound Architecture (ALSA) High Definition Audio (HDA) component. A local user could exploit this vulnerability by providing specially crafted 9.1 surround channel names, leading to an array overflow in the get_line_out_pfx() function. This can cause a system crash, resulting in a denial of service.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
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Description OSIDB Bzimport 2025-09-18 14:02:19 UTC

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

ALSA: hda: Fix Oops by 9.1 surround channel names

get_line_out_pfx() may trigger an Oops by overflowing the static array
with more than 8 channels.  This was reported for MacBookPro 12,1 with
Cirrus codec.

As a workaround, extend for the 9.1 channels and also fix the
potential Oops by unifying the code paths accessing the same array
with the proper size check.

Comment 1 Keith Grant 2025-09-18 17:30:29 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025091859-CVE-2023-53400-2d47@gregkh/T