{ "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": "2026-10-19T20:48:37.025Z" }, "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", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2026-64485", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2026-10-16T15:41:21.913434Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-401", "description": "CWE-401 Missing Release of Memory after Effective Lifetime" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-19T20:48:37.025Z" } } ] } }