{"api_version":"1","generated_at":"2026-08-24T09:56:52+00:00","cve":"CVE-2026-72301","urls":{"html":"https://cve.report/CVE-2026-72301","api":"https://cve.report/api/cve/CVE-2026-72301.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-72301","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-72301"},"summary":{"title":"ASoC: SOF: ipc3-control: Fix TOCTOU in bytes_put and bytes_get","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: SOF: ipc3-control: Fix TOCTOU in bytes_put and bytes_get\n\nIn sof_ipc3_bytes_put(), the size used for the memcpy is derived from\nthe old data->size already in the buffer, not the incoming new data's\nsize field. If the new data has a different size, the copy length is\nwrong: it may truncate valid data or copy stale bytes.\n\nSimilarly, sof_ipc3_bytes_get() checks data->size against max_size\nwithout accounting for the sizeof(struct sof_ipc_ctrl_data) offset\nof the flex array within the allocation.\n\nFix bytes_put to validate and use the incoming data's sof_abi_hdr.size\nfrom ucontrol before copying. Fix bytes_get to subtract sizeof(*cdata)\nfrom the bounds check to match the actual available space.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:22:02","updated_at":"2026-08-17 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Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72301","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 544ac8858f249950b4d99c68e538cdc07300528f 8bd715a9d882fe1993bb2aec5eff89fffa946592 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 544ac8858f249950b4d99c68e538cdc07300528f 0dce240145f47545d2e4b18c6d58033b83e1fd0e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 544ac8858f249950b4d99c68e538cdc07300528f ed4f758f34be4c32e02933ac4fa044589d9c1c16 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 544ac8858f249950b4d99c68e538cdc07300528f 0c4fbdaca225b97122b61b68c5353caa33a253c3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"72301","cve":"CVE-2026-72301","epss":"0.001640000","percentile":"0.060790000","score_date":"2026-08-17","updated_at":"2026-08-18 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the Linux kernel, the following vulnerability has been resolved:\n\nASoC: SOF: ipc3-control: Fix TOCTOU in bytes_put and bytes_get\n\nIn sof_ipc3_bytes_put(), the size used for the memcpy is derived from\nthe old data->size already in the buffer, not the incoming new data's\nsize field. If the new data has a different size, the copy length is\nwrong: it may truncate valid data or copy stale bytes.\n\nSimilarly, sof_ipc3_bytes_get() checks data->size against max_size\nwithout accounting for the sizeof(struct sof_ipc_ctrl_data) offset\nof the flex array within the allocation.\n\nFix bytes_put to validate and use the incoming data's sof_abi_hdr.size\nfrom ucontrol before copying. Fix bytes_get to subtract sizeof(*cdata)\nfrom the bounds check to match the actual available space."}],"metrics":[{"cvssV3_1":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"scenarios":[{"lang":"en","value":"AV:L - Exploitation requires local ALSA access via /dev/snd/controlC* and SNDRV_CTL_IOCTL_ELEM_READ/WRITE ioctls through snd_ctl_elem_write/read to sof_ipc3_bytes_put/get; SOF audio DSP controls are not reachable over the network.\nAC:L - An attacker can deterministically trigger the bug by sequencing bytes_put calls to set a large stale data->size then issue a second put with a smaller header, or use bytes_get after inflating size; no uncontrollable race or rare layout is required.\nPR:L - Only standard local access to the ALSA control device is needed; on typical Linux desktops and laptops with Intel/AMD SOF IPC3, session users in the audio group can write SOF bytes kcontrols without real root or init-namespace capabilities.\nUI:N - No victim interaction is required; a local attacker with sound-device access can directly issue ioctl-based ALSA control read/write operations against writable SOF bytes controls.\nS:U - The flaw corrupts kernel heap memory adjacent to a SOF control allocation and can enable local privilege escalation, but it does not cross a VM, IOMMU, or sandbox security boundary into another authority.\nC:H - sof_ipc3_bytes_get can memcpy up to roughly sizeof(struct sof_ipc_ctrl_data) bytes beyond the kzalloc(max_size) allocation into userspace when data->size passes an incorrect bound, leaking adjacent kernel heap contents.\nI:H - sof_ipc3_bytes_put uses stale data->size for memcpy length instead of the incoming sof_abi_hdr.size, enabling a heap out-of-bounds write past the control buffer that can corrupt adjacent kmalloc objects and be leveraged for code execution.\nA:H - The out-of-bounds read/write corrupts kernel heap metadata or adjacent objects and can cause kernel oops, panic, or hang when exploiting SOF IPC3 bytes controls on affected hardware."}]}],"providerMetadata":{"dateUpdated":"2026-08-17T05:42:33.552Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/8bd715a9d882fe1993bb2aec5eff89fffa946592"},{"url":"https://git.kernel.org/stable/c/0dce240145f47545d2e4b18c6d58033b83e1fd0e"},{"url":"https://git.kernel.org/stable/c/ed4f758f34be4c32e02933ac4fa044589d9c1c16"},{"url":"https://git.kernel.org/stable/c/0c4fbdaca225b97122b61b68c5353caa33a253c3"},{"url":"https://git.kernel.org/stable/c/92f90917413bdd6078fefff6f6c83a07bf870b04"},{"url":"https://git.kernel.org/stable/c/1f97760417b5faa60e9642fd0ed61eb17d0b1b39"}],"title":"ASoC: SOF: ipc3-control: Fix TOCTOU in bytes_put and bytes_get","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-72301","datePublished":"2026-08-15T05:55:20.430Z","dateReserved":"2026-08-09T03:40:39.918Z","dateUpdated":"2026-08-17T05:42:33.552Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:22:02","lastModifiedDate":"2026-08-17 06:18:33","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"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","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"72301","Ordinal":"1","Title":"ASoC: SOF: ipc3-control: Fix TOCTOU in bytes_put and bytes_get","CVE":"CVE-2026-72301","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"72301","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: SOF: ipc3-control: Fix TOCTOU in bytes_put and bytes_get\n\nIn sof_ipc3_bytes_put(), the size used for the memcpy is derived from\nthe old data->size already in the buffer, not the incoming new data's\nsize field. If the new data has a different size, the copy length is\nwrong: it may truncate valid data or copy stale bytes.\n\nSimilarly, sof_ipc3_bytes_get() checks data->size against max_size\nwithout accounting for the sizeof(struct sof_ipc_ctrl_data) offset\nof the flex array within the allocation.\n\nFix bytes_put to validate and use the incoming data's sof_abi_hdr.size\nfrom ucontrol before copying. Fix bytes_get to subtract sizeof(*cdata)\nfrom the bounds check to match the actual available space.","Type":"Description","Title":"ASoC: SOF: ipc3-control: Fix TOCTOU in bytes_put and bytes_get"}]}}}