{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-93808",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-18T17:59:28.790Z",
        "datePublished": "2026-09-24T16:02:43.621Z",
        "dateUpdated": "2026-10-03T10:57:41.411Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-03T10:57:41.411Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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->actual_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."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "sound/usb/caiaq/device.c",
                        "sound/usb/caiaq/input.c"
                    ],
                    "versions": [
                        {
                            "version": "523f1dce37434a9a6623bf46e7893e2b4b10ac3c",
                            "lessThan": "91acd231f219452fa58285239f83945accad9513",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "523f1dce37434a9a6623bf46e7893e2b4b10ac3c",
                            "lessThan": "7cc6b3745a0cea697c8d0684b3094f220281a08d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "523f1dce37434a9a6623bf46e7893e2b4b10ac3c",
                            "lessThan": "add9328c91c195c494cd68a21b19e5e47a20d784",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "523f1dce37434a9a6623bf46e7893e2b4b10ac3c",
                            "lessThan": "319393151367e6626affedcdd4f7b7b0286f4246",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "523f1dce37434a9a6623bf46e7893e2b4b10ac3c",
                            "lessThan": "af8a172c4f71ac30d625f2966d2389a7fa872819",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "523f1dce37434a9a6623bf46e7893e2b4b10ac3c",
                            "lessThan": "74f3c639f64fa5da4e1613149798b5089bce2807",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "523f1dce37434a9a6623bf46e7893e2b4b10ac3c",
                            "lessThan": "aba30af07d4fe499b50209801eba9da8a815522f",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "sound/usb/caiaq/device.c",
                        "sound/usb/caiaq/input.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.22",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.22",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.271",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.222",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.189",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.158",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.111",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.53",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.22",
                                    "versionEndExcluding": "5.10.271"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.22",
                                    "versionEndExcluding": "5.15.222"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.22",
                                    "versionEndExcluding": "6.1.189"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.22",
                                    "versionEndExcluding": "6.6.158"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.22",
                                    "versionEndExcluding": "6.12.111"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.22",
                                    "versionEndExcluding": "6.18.53"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.22",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/91acd231f219452fa58285239f83945accad9513"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7cc6b3745a0cea697c8d0684b3094f220281a08d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/add9328c91c195c494cd68a21b19e5e47a20d784"
                },
                {
                    "url": "https://git.kernel.org/stable/c/319393151367e6626affedcdd4f7b7b0286f4246"
                },
                {
                    "url": "https://git.kernel.org/stable/c/af8a172c4f71ac30d625f2966d2389a7fa872819"
                },
                {
                    "url": "https://git.kernel.org/stable/c/74f3c639f64fa5da4e1613149798b5089bce2807"
                },
                {
                    "url": "https://git.kernel.org/stable/c/aba30af07d4fe499b50209801eba9da8a815522f"
                }
            ],
            "title": "ALSA: usb-audio: caiaq: validate EP1 reply lengths",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}