Bug 2527874 (CVE-2026-80743)

Summary: CVE-2026-80743 kernel: ASoC: xilinx: formatter_pcm: pass aud_drv_data to irq handlers
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: 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   
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A flaw was found in the Linux kernel's Advanced Linux Sound Architecture System on Chip (ASoC) xilinx formatter_pcm component. This vulnerability arises when interrupt request (IRQ) handlers attempt to access driver data before it has been fully initialized during device setup. An interrupt occurring at a precise moment can cause the handler to receive an invalid reference (a null pointer), leading to a system crash and a Denial of Service (DoS).
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Description OSIDB Bzimport 2026-09-03 08:43:30 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ASoC: xilinx: formatter_pcm: pass aud_drv_data to irq handlers

The irq handlers take a struct device pointer and call
dev_get_drvdata() to obtain the driver data.  However, the driver
data is only set at the end of probe, after devm_request_irq(),
so an interrupt taken in between causes the handlers to pass a
NULL pointer to readl() and crash.

Pass the private data directly as the devm_request_irq() argument
instead of the device pointer, matching what the handlers expect.
Comment 1 Mauro Matteo Cascella 2026-09-04 09:31:14 UTC 
Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80743.mbox