{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-39997",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-04-16T07:20:57.151Z",
        "datePublished": "2025-10-15T07:58:21.702Z",
        "dateUpdated": "2026-06-01T16:05:31.937Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-06-01T16:05:31.937Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: fix race condition to UAF in snd_usbmidi_free\n\nThe previous commit 0718a78f6a9f (\"ALSA: usb-audio: Kill timer properly at\nremoval\") patched a UAF issue caused by the error timer.\n\nHowever, because the error timer kill added in this patch occurs after the\nendpoint delete, a race condition to UAF still occurs, albeit rarely.\n\nAdditionally, since kill-cleanup for urb is also missing, freed memory can\nbe accessed in interrupt context related to urb, which can cause UAF.\n\nTherefore, to prevent this, error timer and urb must be killed before\nfreeing the heap memory."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "sound/usb/midi.c"
                    ],
                    "versions": [
                        {
                            "version": "06513dd6d32c37d0364db8488cfdf3e14da238a8",
                            "lessThan": "e63f049c7764b615d1d50cb486745fa63372b42d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "efaf61052b8ff9ee8968912fbaf02c2847c78ede",
                            "lessThan": "e16985513e89466a236d2a7c202783b4dd0c5a46",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "647410a7da46067953a53c0d03f8680eff570959",
                            "lessThan": "dc4874366cf6cf4a31d8fa4b7f0e2a5b2d7647ba",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c611b9e55174e439dcd85a72969b43a95f3827a4",
                            "lessThan": "647d6b8d22be12842fde6ed0c56859ebc615f21e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0718a78f6a9f04b88d0dc9616cc216b31c5f3cf1",
                            "lessThan": "af600e7f5526d16146b3ae99f6ad57bfea79ca33",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0718a78f6a9f04b88d0dc9616cc216b31c5f3cf1",
                            "lessThan": "353d8c715cc951a980728133c9dd64ca5a0a186c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0718a78f6a9f04b88d0dc9616cc216b31c5f3cf1",
                            "lessThan": "9f2c0ac1423d5f267e7f1d1940780fc764b0fee3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "62066758d2ae169278e5d6aea5995b1b6f6ddeb5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6.1.167",
                            "lessThan": "6.1.175",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.15.3",
                            "lessThan": "6.16",
                            "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/midi.c"
                    ],
                    "versions": [
                        {
                            "version": "6.16",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.16",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.175",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.16.11",
                            "lessThanOrEqual": "6.16.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.17.1",
                            "lessThanOrEqual": "6.17.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18",
                            "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": "6.1.167",
                                    "versionEndExcluding": "6.1.175"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.16",
                                    "versionEndExcluding": "6.16.11"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.16",
                                    "versionEndExcluding": "6.17.1"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.16",
                                    "versionEndExcluding": "6.18"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.15.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/e63f049c7764b615d1d50cb486745fa63372b42d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e16985513e89466a236d2a7c202783b4dd0c5a46"
                },
                {
                    "url": "https://git.kernel.org/stable/c/dc4874366cf6cf4a31d8fa4b7f0e2a5b2d7647ba"
                },
                {
                    "url": "https://git.kernel.org/stable/c/647d6b8d22be12842fde6ed0c56859ebc615f21e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/af600e7f5526d16146b3ae99f6ad57bfea79ca33"
                },
                {
                    "url": "https://git.kernel.org/stable/c/353d8c715cc951a980728133c9dd64ca5a0a186c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9f2c0ac1423d5f267e7f1d1940780fc764b0fee3"
                }
            ],
            "title": "ALSA: usb-audio: fix race condition to UAF in snd_usbmidi_free",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}