{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "523f1dce37434a9a6623bf46e7893e2b4b10ac3c"
            },
            {
              "fixed": "af8a172c4f71ac30d625f2966d2389a7fa872819"
            },
            {
              "fixed": "74f3c639f64fa5da4e1613149798b5089bce2807"
            },
            {
              "fixed": "aba30af07d4fe499b50209801eba9da8a815522f"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.22"
            },
            {
              "fixed": "6.12.111"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.53"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93808.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: caiaq: validate EP1 reply lengths\n\nusb_ep1_command_reply_dispatch() uses buf[0] as a command byte and then\nreads command-specific fixed items from the same URB buffer. Several\npaths use buf + 1, buf[1], buf[2], or buf + 3 without first proving that\nurb-\u003eactual_length contains those bytes.\n\nAdd per-command length checks, use a payload length derived from the\nbytes after the command byte for the control-state copy, and reject short\nanalog input payloads before the input helper reads fixed offsets from\nthe EP1 reply.",
  "id": "CVE-2026-93808",
  "modified": "2026-09-27T03:30:30.198992803Z",
  "published": "2026-09-24T16:02:43.621Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/74f3c639f64fa5da4e1613149798b5089bce2807"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aba30af07d4fe499b50209801eba9da8a815522f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/af8a172c4f71ac30d625f2966d2389a7fa872819"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93808.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93808"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "ALSA: usb-audio: caiaq: validate EP1 reply lengths"
}