CVE-2026-93808

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.

EPSS

0.2% chance of exploitation in the next 30 days; higher than 6% of CVEs (scores of 2026-10-25)

Published

2026-09-24

Modified

2026-10-03

Record from

the NVD, synced 2026-10-19

References

• https://git.kernel.org/stable/c/319393151367e6626affedcdd4f7b7b0286f4246
• https://git.kernel.org/stable/c/74f3c639f64fa5da4e1613149798b5089bce2807
• https://git.kernel.org/stable/c/7cc6b3745a0cea697c8d0684b3094f220281a08d
• https://git.kernel.org/stable/c/91acd231f219452fa58285239f83945accad9513
• https://git.kernel.org/stable/c/aba30af07d4fe499b50209801eba9da8a815522f

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