CVE-2026-31777
Analyzed Analyzed - Analysis Complete
ALSA: ctxfi Driver Index Mapping Error Handling Fix

Publication date: 2026-05-01

Last updated on: 2026-05-07

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: ctxfi: Check the error for index mapping The ctxfi driver blindly assumed a proper value returned from daio_device_index(), but it's not always true. Add a proper error check to deal with the error from the function.
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Meta Information
Published
2026-05-01
Last Modified
2026-05-07
Generated
2026-06-16
AI Q&A
2026-05-01
EPSS Evaluated
2026-06-15
NVD
CVE-2026-31777
EUVD
EUVD-2026-26590
Affected Vendors & Products
Showing 7 associated CPEs
Vendor Product Version / Range
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel From 2.6.31 (inc) to 6.19.12 (exc)
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability exists in the Linux kernel's ALSA ctxfi driver. The driver assumed that the function daio_device_index() would always return a valid value, but this assumption was incorrect. The vulnerability arises because the driver did not properly check for errors returned by daio_device_index(), potentially leading to improper behavior.

Impact Analysis

Because the ctxfi driver did not check for errors from daio_device_index(), it could lead to unexpected or incorrect behavior in the ALSA sound subsystem. This might cause system instability or malfunction related to audio device handling.

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