{"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": "2026-10-16T18:55:16.018Z"}, "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": 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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["sound/soc/sof/ipc3-control.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "8bd715a9d882fe1993bb2aec5eff89fffa946592", "status": "affected", "version": "544ac8858f249950b4d99c68e538cdc07300528f", "versionType": "git"}, {"lessThan": "0dce240145f47545d2e4b18c6d58033b83e1fd0e", "status": "affected", "version": "544ac8858f249950b4d99c68e538cdc07300528f", "versionType": "git"}, {"lessThan": "ed4f758f34be4c32e02933ac4fa044589d9c1c16", "status": "affected", "version": "544ac8858f249950b4d99c68e538cdc07300528f", "versionType": "git"}, {"lessThan": "0c4fbdaca225b97122b61b68c5353caa33a253c3", "status": "affected", "version": "544ac8858f249950b4d99c68e538cdc07300528f", "versionType": "git"}, {"lessThan": "92f90917413bdd6078fefff6f6c83a07bf870b04", "status": "affected", "version": "544ac8858f249950b4d99c68e538cdc07300528f", "versionType": "git"}, {"lessThan": "1f97760417b5faa60e9642fd0ed61eb17d0b1b39", "status": "affected", "version": "544ac8858f249950b4d99c68e538cdc07300528f", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["sound/soc/sof/ipc3-control.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.18"}, {"lessThan": "5.18", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.178", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.145", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.97", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-72301", "lastModified": "2026-10-16T19:17:20.357", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-72301", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T18:46:11.606714Z", "version": "2.0.3"}}]}, "published": "2026-08-15T06:22:02.807", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0c4fbdaca225b97122b61b68c5353caa33a253c3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0dce240145f47545d2e4b18c6d58033b83e1fd0e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1f97760417b5faa60e9642fd0ed61eb17d0b1b39"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8bd715a9d882fe1993bb2aec5eff89fffa946592"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/92f90917413bdd6078fefff6f6c83a07bf870b04"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ed4f758f34be4c32e02933ac4fa044589d9c1c16"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: ASoC: SOF: ipc3-control: Fix TOCTOU in bytes_put and bytes_get", "id": "2516471", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516471"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["A flaw was found in the Linux kernel's Sound Open Firmware (SOF) IPC3 control module. This vulnerability, a Time-of-check to Time-of-use (TOCTOU) issue, arises from incorrect size handling during memory copy operations in the `bytes_put` and `bytes_get` functions. A local attacker could exploit this to cause data corruption, where valid data might be truncated or stale data copied, potentially resulting in information disclosure or denial of service."], "name": "CVE-2026-72301", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72301\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72301\nhttps://lore.kernel.org/linux-cve-announce/2026081502-CVE-2026-72301-c96e@gregkh/T"], "threat_severity": "Moderate"}

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