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CVE-2026-93808

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

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.111, and 1 more
None on Exploit-DB, Metasploit or GitHub

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.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From 523f1dce37434a9a6623bf46e7893e2b4b10ac3c · fixed in 91acd231f219452fa58285239f83945accad9513; From 523f1dce37434a9a6623bf46e7893e2b4b10ac3c · fixed in 7cc6b3745a0cea697c8d0684b3094f220281a08d; From 523f1dce37434a9a6623bf46e7893e2b4b10ac3c · fixed in add9328c91c195c494cd68a21b19e5e47a20d784; From 523f1dce37434a9a6623bf46e7893e2b4b10ac3c · fixed in 319393151367e6626affedcdd4f7b7b0286f4246; From 523f1dce37434a9a6623bf46e7893e2b4b10ac3c · fixed in af8a172c4f71ac30d625f2966d2389a7fa872819; From 523f1dce37434a9a6623bf46e7893e2b4b10ac3c · fixed in 74f3c639f64fa5da4e1613149798b5089bce2807; From 523f1dce37434a9a6623bf46e7893e2b4b10ac3c · fixed in aba30af07d4fe499b50209801eba9da8a815522f

  • Linux Linux

    2.6.22

  • KernelLinux

    From 2.6.22 · fixed in 5.10.271; From 5.11.0 · fixed in 5.15.222; From 5.16.0 · fixed in 6.1.189; From 6.2.0 · fixed in 6.6.158; From 6.7.0 · fixed in 6.12.111; From 6.13.0 · fixed in 6.18.53

References 7

git.kernel.org