CVE-2026-93808
ALSA: usb-audio: caiaq: validate EP1 reply lengths
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 24, 2026 |
| Last Updated | Oct 3, 2026 |
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Affected Versions
Linux / Linux
523f1dce37434a9a6623bf46e7893e2b4b10ac3c < 91acd231f219452fa58285239f83945accad9513 523f1dce37434a9a6623bf46e7893e2b4b10ac3c < 7cc6b3745a0cea697c8d0684b3094f220281a08d 523f1dce37434a9a6623bf46e7893e2b4b10ac3c < add9328c91c195c494cd68a21b19e5e47a20d784 523f1dce37434a9a6623bf46e7893e2b4b10ac3c < 319393151367e6626affedcdd4f7b7b0286f4246 523f1dce37434a9a6623bf46e7893e2b4b10ac3c < af8a172c4f71ac30d625f2966d2389a7fa872819 523f1dce37434a9a6623bf46e7893e2b4b10ac3c < 74f3c639f64fa5da4e1613149798b5089bce2807 523f1dce37434a9a6623bf46e7893e2b4b10ac3c < aba30af07d4fe499b50209801eba9da8a815522f
Linux / Linux
2.6.22
References
git.kernel.org: https://git.kernel.org/stable/c/91acd231f219452fa58285239f83945accad9513 git.kernel.org: https://git.kernel.org/stable/c/7cc6b3745a0cea697c8d0684b3094f220281a08d git.kernel.org: https://git.kernel.org/stable/c/add9328c91c195c494cd68a21b19e5e47a20d784 git.kernel.org: https://git.kernel.org/stable/c/319393151367e6626affedcdd4f7b7b0286f4246 git.kernel.org: https://git.kernel.org/stable/c/af8a172c4f71ac30d625f2966d2389a7fa872819 git.kernel.org: https://git.kernel.org/stable/c/74f3c639f64fa5da4e1613149798b5089bce2807 git.kernel.org: https://git.kernel.org/stable/c/aba30af07d4fe499b50209801eba9da8a815522f