What’s Vulnerable › Vulnerabilities

CVE-2026-46146: ALSA: usb-audio: Avoid potential endless loop in convert_chmap_v3()

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-28 · updated 2026-10-15
• Weakness: CWE-835

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Avoid potential endless loop in convert_chmap_v3() The convert_chmap_v3() has a loop with its increment size of cs_desc->wLength, but we forgot to validate cs_desc->wLength itself, which may lead to potential endless loop by a malformed descriptor. Add a proper size check to abort the loop for plugging the hole.

Affected products

• Linux kernel: from 5.4.297 before 5.5; from 5.10.241 before 5.10.258; from 5.15.190 before 5.15.209; from 6.1.149 before 6.1.175; from 6.6.103 before 6.6.140; from 6.12.43 before 6.12.88 — fixed in 5.10.258, 5.15.209, 5.5, 6.1.175, 6.12.88, 6.16

How to fix

Upgrade to a fixed version: Linux kernel 5.10.258, 5.15.209, 5.5, 6.1.175. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/076d5d13eb9c1ad259a7f246149f6676c62285f9
• https://git.kernel.org/stable/c/24a40df79307ca7ca0eec0889361cf6ac146d72a
• https://git.kernel.org/stable/c/316aa0b1e3c5600eae5ab876394c1ac70e6db581
• https://git.kernel.org/stable/c/4e0ee232ebe3df04874125d7c7f3e6c25ea5483d
• https://git.kernel.org/stable/c/6e7247d8f5fefeceb0bb9cc80a5388a636b219cd
• https://git.kernel.org/stable/c/be09b47ed8677d76962e3240c145502e2ad9f3c8
• https://git.kernel.org/stable/c/e0e3dcf48189603f3865f1a0b799b3b42baae96d
• https://git.kernel.org/stable/c/fa5b19ce69067874b1413f3c2027563bae8c2cb3
• https://cert-portal.siemens.com/productcert/html/ssa-784472.html

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