{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-72301", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.918Z", "datePublished": "2026-08-15T05:55:20.430Z", "dateUpdated": "2026-08-17T05:42:33.552Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:42:33.552Z" }, "descriptions": [ { "lang": "en", "value": "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." } ], "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 - 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." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "sound/soc/sof/ipc3-control.c" ], "versions": [ { "version": "544ac8858f249950b4d99c68e538cdc07300528f", "lessThan": "8bd715a9d882fe1993bb2aec5eff89fffa946592", "status": "affected", "versionType": "git" }, { "version": "544ac8858f249950b4d99c68e538cdc07300528f", "lessThan": "0dce240145f47545d2e4b18c6d58033b83e1fd0e", "status": "affected", "versionType": "git" }, { "version": "544ac8858f249950b4d99c68e538cdc07300528f", "lessThan": "ed4f758f34be4c32e02933ac4fa044589d9c1c16", "status": "affected", "versionType": "git" }, { "version": "544ac8858f249950b4d99c68e538cdc07300528f", "lessThan": "0c4fbdaca225b97122b61b68c5353caa33a253c3", "status": "affected", "versionType": "git" }, { "version": "544ac8858f249950b4d99c68e538cdc07300528f", "lessThan": "92f90917413bdd6078fefff6f6c83a07bf870b04", "status": "affected", "versionType": "git" }, { "version": "544ac8858f249950b4d99c68e538cdc07300528f", "lessThan": "1f97760417b5faa60e9642fd0ed61eb17d0b1b39", "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/soc/sof/ipc3-control.c" ], "versions": [ { "version": "5.18", "status": "affected" }, { "version": "0", "lessThan": "5.18", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.5", "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": "5.18", "versionEndExcluding": "6.1.178" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.6.145" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.12.97" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.18.40" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "7.1.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "7.2" } ] } ] } ], "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" } } } }