{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-23318",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-01-13T15:37:45.995Z",
        "datePublished": "2026-03-25T10:27:12.884Z",
        "dateUpdated": "2026-05-23T16:04:33.455Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-23T16:04:33.455Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: Use correct version for UAC3 header validation\n\nThe entry of the validators table for UAC3 AC header descriptor is\ndefined with the wrong protocol version UAC_VERSION_2, while it should\nhave been UAC_VERSION_3.  This results in the validator never matching\nfor actual UAC3 devices (protocol == UAC_VERSION_3), causing their\nheader descriptors to bypass validation entirely.  A malicious USB\ndevice presenting a truncated UAC3 header could exploit this to cause\nout-of-bounds reads when the driver later accesses unvalidated\ndescriptor fields.\n\nThe bug was introduced in the same commit as the recently fixed UAC3\nfeature unit sub-type typo, and appears to be from the same copy-paste\nerror when the UAC3 section was created from the UAC2 section."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "sound/usb/validate.c"
                    ],
                    "versions": [
                        {
                            "version": "57f8770620e9b51c61089751f0b5ad3dbe376ff2",
                            "lessThan": "82a7d0a1b88798de1a609130080ce0c65dd869e9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "57f8770620e9b51c61089751f0b5ad3dbe376ff2",
                            "lessThan": "8307d93e63d5f54ef10412d4db2dd551e920dee4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "57f8770620e9b51c61089751f0b5ad3dbe376ff2",
                            "lessThan": "0dcd1ed96c03459cf14706885c9dd3c1fd8bd29f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "57f8770620e9b51c61089751f0b5ad3dbe376ff2",
                            "lessThan": "a0c6ae2ea84528f198bf7fd0117f12fd0cf6d7cc",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "57f8770620e9b51c61089751f0b5ad3dbe376ff2",
                            "lessThan": "d3904ca40515272681ae61ad6f561c24f190957f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "57f8770620e9b51c61089751f0b5ad3dbe376ff2",
                            "lessThan": "1e5753ff4c2e86aa88516f97a224c90a3d0b133e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "57f8770620e9b51c61089751f0b5ad3dbe376ff2",
                            "lessThan": "499ffd15b00dc91ac95c28f76959dfb5cdcc84d5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "57f8770620e9b51c61089751f0b5ad3dbe376ff2",
                            "lessThan": "54f9d645a5453d0bfece0c465d34aaf072ea99fa",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "17821e2fb16752f5d363fb5c3f8aab4df41b9bcc",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "bf74a46aebb1b5ab5e5f25bafa4ae0a453ba813a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4.19.84",
                            "lessThan": "4.20",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.3.11",
                            "lessThan": "5.4",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "sound/usb/validate.c"
                    ],
                    "versions": [
                        {
                            "version": "5.4",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.4",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.253",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.203",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.167",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.130",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.77",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.17",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.7",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0",
                            "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": "5.4",
                                    "versionEndExcluding": "5.10.253"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.4",
                                    "versionEndExcluding": "5.15.203"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.4",
                                    "versionEndExcluding": "6.1.167"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.4",
                                    "versionEndExcluding": "6.6.130"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.4",
                                    "versionEndExcluding": "6.12.77"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.4",
                                    "versionEndExcluding": "6.18.17"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.4",
                                    "versionEndExcluding": "6.19.7"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.4",
                                    "versionEndExcluding": "7.0"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.19.84"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.3.11"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/82a7d0a1b88798de1a609130080ce0c65dd869e9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8307d93e63d5f54ef10412d4db2dd551e920dee4"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0dcd1ed96c03459cf14706885c9dd3c1fd8bd29f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a0c6ae2ea84528f198bf7fd0117f12fd0cf6d7cc"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d3904ca40515272681ae61ad6f561c24f190957f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1e5753ff4c2e86aa88516f97a224c90a3d0b133e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/499ffd15b00dc91ac95c28f76959dfb5cdcc84d5"
                },
                {
                    "url": "https://git.kernel.org/stable/c/54f9d645a5453d0bfece0c465d34aaf072ea99fa"
                }
            ],
            "title": "ALSA: usb-audio: Use correct version for UAC3 header validation",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}