{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-64485",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-07-19T15:36:31.791Z",
        "datePublished": "2026-07-25T08:51:45.301Z",
        "dateUpdated": "2026-08-17T04:56:32.502Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-17T04:56:32.502Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: compress: Fix task creation error unwind\n\nsnd_compr_task_new() allocates the driver task before validating the\nreturned DMA buffers and reserving file descriptors. When either of\nthose later steps fails, the core frees its task wrapper and DMA-buffer\nreferences without calling the driver's task_free() callback. Any\ndriver resources allocated by task_create() are therefore leaked.\n\nThe dual-fd allocation path also jumps to cleanup without storing the\nnegative get_unused_fd_flags() result in retval. Since retval still\ncontains the successful task_create() return value, TASK_CREATE can\nincorrectly report success although the task was discarded.\n\nPreserve the fd allocation errors and call task_free() when failure\noccurs after a successful task_create() callback."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 7.8,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:L - The vulnerable path requires opening the local ALSA compress accelerator device and issuing SET_PARAMS and TASK_CREATE ioctls; no network or physical-input path reaches it.\nAC:L - The attacker can deterministically exhaust its own file-descriptor table so descriptor allocation fails after task_create succeeds. No race or condition outside the attacker’s control is required.\nPR:L - There are no capable(), ns_capable(), or authentication checks in this path, so an unprivileged user with ordinary access to the ASRC device node can trigger it.\nUI:N - The attacker alone can configure the stream, exhaust descriptors, issue TASK_CREATE, and close the stream. No separate victim action is required.\nS:U - The vulnerable ALSA driver and the affected kernel resources share the same security authority; kernel compromise is a conventional local privilege escalation.\nC:H - Skipping task_free leaves asrc->pair[] referencing a driver object that stream close subsequently frees, producing an attacker-reclaimable UAF in interrupt and power-management paths. Reclaimed DMA-channel pointers can influence kernel control flow and expose arbitrary kernel data.\nI:H - The stale pair is used for writes through completion handling and for an indirect device_terminate_all call through its DMA-channel pointer. Heap reclamation can therefore provide memory-corruption and control-flow-hijacking primitives.\nA:H - The leak exhausts the finite ASRC contexts and exclusive DMA channels, persistently disabling the device. Dereferencing the stale pair during interrupt or suspend/resume handling can also cause a kernel oops, panic, or hang."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "sound/core/compress_offload.c"
                    ],
                    "versions": [
                        {
                            "version": "04177158cf98a79744937893b100020d77e6f9ac",
                            "lessThan": "b27a75d42044d9d4709095617730b91b1c4af423",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "04177158cf98a79744937893b100020d77e6f9ac",
                            "lessThan": "426a9947a38d272d0e19c031658da68e31128667",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "04177158cf98a79744937893b100020d77e6f9ac",
                            "lessThan": "4a60127debb9e370d6c0e22a307326b624a141f3",
                            "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/core/compress_offload.c"
                    ],
                    "versions": [
                        {
                            "version": "6.13",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.13",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.39",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.4",
                            "lessThanOrEqual": "7.1.*",
                            "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": "6.13",
                                    "versionEndExcluding": "6.18.39"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.13",
                                    "versionEndExcluding": "7.1.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.13",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/b27a75d42044d9d4709095617730b91b1c4af423"
                },
                {
                    "url": "https://git.kernel.org/stable/c/426a9947a38d272d0e19c031658da68e31128667"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4a60127debb9e370d6c0e22a307326b624a141f3"
                }
            ],
            "title": "ALSA: compress: Fix task creation error unwind",
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}