Bug 2536256 (CVE-2026-90214)

Summary:	CVE-2026-90214 kernel: ASoC: xilinx: formatter_pcm: fix stream_data leak on open error
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
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's Advanced Linux Sound Architecture (ALSA) System on Chip (ASoC) Xilinx formatter Pulse-Code Modulation (PCM) driver. During the opening of an audio stream, memory allocated for stream data is not properly released if an error occurs in a subsequent step. This can lead to a memory leak and a dangling pointer, potentially allowing a local attacker to trigger a use-after-free condition, which could result in a system crash or denial of service.	Story Points:	---
Clone Of:		Environment:
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Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-09-17 17:10:12 UTC

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

ASoC: xilinx: formatter_pcm: fix stream_data leak on open error

In xlnx_formatter_pcm_open(), stream_data is allocated and
adata->play_stream or adata->capture_stream is assigned early.  If a
later step, such as snd_pcm_hw_constraint_step() or
snd_pcm_hw_constraint_integer(), fails, the function returns the error
immediately.  ALSA does not call the close callback when open fails, so
stream_data is leaked and the stream pointer is left dangling, pointing
to a substream that ALSA frees.  A later interrupt would then call
snd_pcm_period_elapsed() on the freed substream.

Free stream_data and clear the stream pointer on the error paths.

Comment 1 Mauro Matteo Cascella 2026-09-24 12:25:08 UTC

Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90214.mbox