CVE-2026-46146
Linux Kernel Endless Loop in USB Audio Driver
Publication date: 2026-05-28
Last updated on: 2026-05-28
Assigner: kernel.org
Description
Description
CVSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in the Linux kernel's ALSA usb-audio component, specifically in the function convert_chmap_v3().
The function contains a loop that increments by the size value cs_desc->wLength, but there is no validation of this size value itself.
If a malformed descriptor provides an invalid cs_desc->wLength, it can cause the loop to run endlessly, leading to a potential endless loop condition.
The fix involved adding a proper size check to abort the loop when an invalid size is detected, preventing the endless loop.
How can this vulnerability impact me? :
The vulnerability can cause the affected function in the Linux kernel to enter an endless loop when processing a malformed USB audio descriptor.
This may lead to resource exhaustion such as CPU usage spikes or system instability, potentially affecting system performance or availability.
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, update the Linux kernel to a version where the ALSA usb-audio convert_chmap_v3() function includes the proper size check to prevent the potential endless loop caused by malformed descriptors.