Vulnerability 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.
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
- https://git.kernel.org/stable/c/add9328c91c195c494cd68a21b19e5e47a20d784
- https://git.kernel.org/stable/c/af8a172c4f71ac30d625f2966d2389a7fa872819
FAQ
What is CVE-2026-93808?
CVE-2026-93808 is a documented vulnerability. 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 c...
How severe is CVE-2026-93808?
CVSS scoring is not yet available for CVE-2026-93808. Check NVD for updates.
Is there a patch for CVE-2026-93808?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.