CVE-2026-93808

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux523f1dce37434a9a6623bf46e7893e2b4b10ac3c < 91acd231f219452fa58285239f83945accad9513affected
LinuxLinux523f1dce37434a9a6623bf46e7893e2b4b10ac3c < 7cc6b3745a0cea697c8d0684b3094f220281a08daffected
LinuxLinux523f1dce37434a9a6623bf46e7893e2b4b10ac3c < add9328c91c195c494cd68a21b19e5e47a20d784affected
LinuxLinux523f1dce37434a9a6623bf46e7893e2b4b10ac3c < 319393151367e6626affedcdd4f7b7b0286f4246affected
LinuxLinux523f1dce37434a9a6623bf46e7893e2b4b10ac3c < af8a172c4f71ac30d625f2966d2389a7fa872819affected
LinuxLinux523f1dce37434a9a6623bf46e7893e2b4b10ac3c < 74f3c639f64fa5da4e1613149798b5089bce2807affected
LinuxLinux523f1dce37434a9a6623bf46e7893e2b4b10ac3c < aba30af07d4fe499b50209801eba9da8a815522faffected
LinuxLinux2.6.22affected
LinuxLinux0 < 2.6.22unaffected
LinuxLinux5.10.271 <= 5.10.*unaffected
LinuxLinux5.15.222 <= 5.15.*unaffected
LinuxLinux6.1.189 <= 6.1.*unaffected
LinuxLinux6.6.158 <= 6.6.*unaffected
LinuxLinux6.12.111 <= 6.12.*unaffected
LinuxLinux6.18.53 <= 6.18.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References