CVE-2026-31776
ALSA: ctxfi SPDIF1 Index Handling Flaw
Publication date: 2026-05-01
Last updated on: 2026-05-07
Assigner: kernel.org
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| 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 6.19 (inc) to 6.19.12 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-129 | The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is in the Linux kernel's ALSA sound subsystem, specifically related to the ctxfi driver. The issue is that the SPDIF1 DAIO type was not properly handled in the function daio_device_index() for the hw20k2 hardware. Instead of returning the correct index, the function returned an error code (-EINVAL), which caused an out-of-bounds array access. The fix involved following the pattern used for hw20k1 hardware to return the proper index for SPDIF1 DAIO type as well.
How can this vulnerability impact me? :
The vulnerability can lead to an out-of-bounds array access in the ALSA ctxfi driver when handling SPDIF1 DAIO type on hw20k2 hardware. This could potentially cause system instability, crashes, or unexpected behavior in the sound subsystem of the Linux kernel.