Bug 2528786 (CVE-2026-80900)

Summary:	CVE-2026-80900 kernel: ASoC: SDCA: Make UMP message size check more robust
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:	akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, suppawar, vlaad, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
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Doc Text:	A flaw was found in the Linux kernel, specifically within the Advanced Linux Sound Architecture (ALSA) System on Chip (ASoC) SoundWire Digital Control Adapter (SDCA) component. This vulnerability arises from an improper validation of User Mode Protocol (UMP) message sizes. If a message offset exceeds the buffer's length, the size check fails to correctly identify the invalid size. This could potentially allow an attacker to cause system instability or a denial of service.	Story Points:	---
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-09-04 17:33:23 UTC

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

ASoC: SDCA: Make UMP message size check more robust

If message offset was larger than the buffer length the size
check will pass incorrectly. Refactor the check such that it is
more robust to invalid sizes.

Comment 1 Mauro Matteo Cascella 2026-09-07 09:40:16 UTC

Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80900.mbox