CVE-2026-97909
Received Received - Intake

ASoC STI IRQ Lock Initialization Flaw in Linux Kernel

Publication date: 2026-09-25

Last updated on: 2026-09-25

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: ASoC: sti: initialize IRQ lock before requesting IRQ uni_reader_init() registers the shared IRQ before initializing reader->irq_lock. A pending interrupt can invoke the handler while the lock is still uninitialized. Initialize the lock before registering the IRQ so the interrupt path always sees valid lock state.

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Meta Information

Published
2026-09-25
Last Modified
2026-09-25
Generated
2026-09-25
AI Q&A
2026-09-25
EPSS Evaluated
N/A
NVD
CVE-2026-97909
EUVD
EUVD-2026-86763

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability is in the Linux kernel's ASoC subsystem for STI devices. It involves a race condition where the IRQ lock is initialized after the shared interrupt is registered. This means an interrupt could occur before the lock is set up, potentially causing undefined behavior or crashes when the interrupt handler tries to use the uninitialized lock.

Detection Guidance

This vulnerability is specific to the Linux kernel's ASoC STI driver and requires kernel-level inspection. Detection involves checking if the system is running a vulnerable kernel version and verifying the driver initialization sequence. No direct network detection commands apply. Inspect kernel logs for ASoC-related errors or check the driver source code for the initialization order.

Impact Analysis

If exploited, this could lead to system instability, crashes, or denial of service on affected Linux systems using the STI ASoC driver. It may also allow privilege escalation if combined with other vulnerabilities, though no active exploitation is currently known.

Mitigation Strategies

Apply the latest kernel update provided by your Linux distribution to patch the ASoC STI driver. If an update is unavailable, disable the affected driver module (snd-soc-sti) if not required. Monitor kernel logs for ASoC-related errors post-update.

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