In the Linux kernel, the following vulnerability has been resolved:

ALSA: usb-audio: caiaq: validate EP1 reply lengths

usb_ep1_command_reply_dispatch() uses buf[0] as a command byte and then
reads command-specific fixed items from the same URB buffer. Several
paths use buf + 1, buf[1], buf[2], or buf + 3 without first proving that
urb->actual_length contains those bytes.

Add per-command length checks, use a payload length derived from the
bytes after the command byte for the control-state copy, and reject short
analog input payloads before the input helper reads fixed offsets from
the EP1 reply.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < af8a172c4f71ac30d625f2966d2389a7fa872819
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < 74f3c639f64fa5da4e1613149798b5089bce2807
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < aba30af07d4fe499b50209801eba9da8a815522f
0 affected < 6.12.111
0 affected < 6.18.53
Linux Linux affected
Version Status Constraints
6.12.111 unaffected ≤ 6.12.*
6.18.53 unaffected ≤ 6.18.*
7.2 unaffected ≤ *

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References
Link Providers
https://git.kernel.org/stable/c/74f3c639f64fa5da4e1613149798b5089bce2807 cve-icon
https://git.kernel.org/stable/c/aba30af07d4fe499b50209801eba9da8a815522f cve-icon
https://git.kernel.org/stable/c/af8a172c4f71ac30d625f2966d2389a7fa872819 cve-icon
History

Thu, 24 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: caiaq: validate EP1 reply lengths usb_ep1_command_reply_dispatch() uses buf[0] as a command byte and then reads command-specific fixed items from the same URB buffer. Several paths use buf + 1, buf[1], buf[2], or buf + 3 without first proving that urb->actual_length contains those bytes. Add per-command length checks, use a payload length derived from the bytes after the command byte for the control-state copy, and reject short analog input payloads before the input helper reads fixed offsets from the EP1 reply.
Title ALSA: usb-audio: caiaq: validate EP1 reply lengths
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-09-24T16:02:43.621Z

Reserved: 2026-09-18T17:59:28.790Z

Link: CVE-2026-93808

cve-icon Vulnrichment

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cve-icon NVD

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cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses

No weakness.