{"api_version":"1","generated_at":"2026-08-23T21:53:22+00:00","cve":"CVE-2026-72262","urls":{"html":"https://cve.report/CVE-2026-72262","api":"https://cve.report/api/cve/CVE-2026-72262.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-72262","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-72262"},"summary":{"title":"ASoC: SOF: ipc3-control: Fix heap overflow in bytes_ext put/get","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: SOF: ipc3-control: Fix heap overflow in bytes_ext put/get\n\nThe ipc_control_data buffer is allocated as kzalloc(max_size), where\nmax_size covers the entire struct sof_ipc_ctrl_data including its\nflexible array payload. However, the bounds checks in bytes_ext_put\nand _bytes_ext_get compared user data lengths against max_size\ndirectly, ignoring that cdata->data sits at an offset of\nsizeof(struct sof_ipc_ctrl_data) bytes into the allocation.\n\nThis allowed writing up to sizeof(struct sof_ipc_ctrl_data) bytes past\nthe end of the heap buffer from unprivileged userspace via the ALSA TLV\nkcontrol interface, and similarly allowed over-reading adjacent heap\ndata on the get path.\n\nFix all bounds checks to subtract sizeof(*cdata) from max_size so they\nreflect the actual space available at the cdata->data offset. Also fix\nthe error-path restore in bytes_ext_put which wrote to cdata->data\ninstead of cdata, causing the same overflow.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:21:54","updated_at":"2026-08-23 13:16:42"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"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"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"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"}}],"references":[{"url":"https://git.kernel.org/stable/c/121577383b5cf221e86581e0f2bcca4c66f17469","name":"https://git.kernel.org/stable/c/121577383b5cf221e86581e0f2bcca4c66f17469","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fd46668d538993218eea19c6925c868ac0f2630c","name":"https://git.kernel.org/stable/c/fd46668d538993218eea19c6925c868ac0f2630c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1adde1941bba7b0d7104b86ed819d48d81cb0ad9","name":"https://git.kernel.org/stable/c/1adde1941bba7b0d7104b86ed819d48d81cb0ad9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/af4b437a463ac0482ba705434a44da06783778e6","name":"https://git.kernel.org/stable/c/af4b437a463ac0482ba705434a44da06783778e6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/eaa67e139c9217099e2a7b717aeeb46c65de3494","name":"https://git.kernel.org/stable/c/eaa67e139c9217099e2a7b717aeeb46c65de3494","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f4933e1d11b97b6a0951648b7c3e53850e1b33a9","name":"https://git.kernel.org/stable/c/f4933e1d11b97b6a0951648b7c3e53850e1b33a9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-72262","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72262","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 af4b437a463ac0482ba705434a44da06783778e6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 1adde1941bba7b0d7104b86ed819d48d81cb0ad9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 eaa67e139c9217099e2a7b717aeeb46c65de3494 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 121577383b5cf221e86581e0f2bcca4c66f17469 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 f4933e1d11b97b6a0951648b7c3e53850e1b33a9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 fd46668d538993218eea19c6925c868ac0f2630c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.18","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.18 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.184 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.145 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.97 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 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":"72262","cve":"CVE-2026-72262","epss":"0.001770000","percentile":"0.075050000","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 heap overflow in bytes_ext put/get\n\nThe ipc_control_data buffer is allocated as kzalloc(max_size), where\nmax_size covers the entire struct sof_ipc_ctrl_data including its\nflexible array payload. However, the bounds checks in bytes_ext_put\nand _bytes_ext_get compared user data lengths against max_size\ndirectly, ignoring that cdata->data sits at an offset of\nsizeof(struct sof_ipc_ctrl_data) bytes into the allocation.\n\nThis allowed writing up to sizeof(struct sof_ipc_ctrl_data) bytes past\nthe end of the heap buffer from unprivileged userspace via the ALSA TLV\nkcontrol interface, and similarly allowed over-reading adjacent heap\ndata on the get path.\n\nFix all bounds checks to subtract sizeof(*cdata) from max_size so they\nreflect the actual space available at the cdata->data offset. Also fix\nthe error-path restore in bytes_ext_put which wrote to cdata->data\ninstead of cdata, causing the same overflow."}],"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 a local ioctl on /dev/snd/controlC* (SNDRV_CTL_IOCTL_TLV_WRITE/READ) through the ALSA control device; there is no network, adjacent-radio, or physical-bus attack surface for this SOF IPC3 kcontrol path.\nAC:L - On affected SOF IPC3 systems with topology bytes_ext controls, an attacker can deterministically trigger the bug by issuing TLV writes with header.length equal to max_size, causing copy_from_user/memcpy to overrun the kzalloc(max_size) buffer by sizeof(struct sof_ipc_ctrl_data).\nPR:L - The fix commit states the overflow is reachable from unprivileged userspace via ALSA TLV kcontrols; any local user who can open the sound control device (typically membership in the audio group on Linux, or an app with audio access on Android/ChromeOS) can reach the vulnerable code without real root.\nUI:N - Exploitation is performed entirely by the attacker issuing ALSA TLV ioctls against an existing bytes_ext kcontrol; no victim click, mount, or other interactive action beyond the attacker's own access to the sound control interface is required.\nS:U - The vulnerability corrupts kernel heap memory from a local userspace context and enables standard kernel privilege escalation or denial of service; it does not cross a VM, container, or IOMMU security boundary into a separate authority.\nC:H - The get path can copy_to_user up to sizeof(struct sof_ipc_ctrl_data) bytes beyond the allocated ipc_control_data buffer, leaking adjacent kernel heap contents; combined with the controllable overflow, this is an out-of-bounds read/memory corruption primitive consistent with arbitrary disclosure potential.\nI:H - The put path performs an out-of-bounds heap write of up to sizeof(struct sof_ipc_ctrl_data) bytes past the kzalloc(max_size) allocation (including via the err_restore memcpy), enabling heap metadata/object corruption that can be developed into arbitrary kernel write or code execution.\nA:H - Heap out-of-bounds writes of roughly 96 bytes into adjacent slab objects can corrupt kernel structures and trigger oops/panic or wedged audio/subsystem state; repeated TLV operations make denial of service reliably achievable even without full exploitation."}]}],"providerMetadata":{"dateUpdated":"2026-08-23T12:47:11.302Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/af4b437a463ac0482ba705434a44da06783778e6"},{"url":"https://git.kernel.org/stable/c/1adde1941bba7b0d7104b86ed819d48d81cb0ad9"},{"url":"https://git.kernel.org/stable/c/eaa67e139c9217099e2a7b717aeeb46c65de3494"},{"url":"https://git.kernel.org/stable/c/121577383b5cf221e86581e0f2bcca4c66f17469"},{"url":"https://git.kernel.org/stable/c/f4933e1d11b97b6a0951648b7c3e53850e1b33a9"},{"url":"https://git.kernel.org/stable/c/fd46668d538993218eea19c6925c868ac0f2630c"}],"title":"ASoC: SOF: ipc3-control: Fix heap overflow in bytes_ext put/get","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-72262","datePublished":"2026-08-15T05:54:49.635Z","dateReserved":"2026-08-09T03:40:39.915Z","dateUpdated":"2026-08-23T12:47:11.302Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:21:54","lastModifiedDate":"2026-08-23 13:16:42","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":"72262","Ordinal":"1","Title":"ASoC: SOF: ipc3-control: Fix heap overflow in bytes_ext put/get","CVE":"CVE-2026-72262","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"72262","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: SOF: ipc3-control: Fix heap overflow in bytes_ext put/get\n\nThe ipc_control_data buffer is allocated as kzalloc(max_size), where\nmax_size covers the entire struct sof_ipc_ctrl_data including its\nflexible array payload. However, the bounds checks in bytes_ext_put\nand _bytes_ext_get compared user data lengths against max_size\ndirectly, ignoring that cdata->data sits at an offset of\nsizeof(struct sof_ipc_ctrl_data) bytes into the allocation.\n\nThis allowed writing up to sizeof(struct sof_ipc_ctrl_data) bytes past\nthe end of the heap buffer from unprivileged userspace via the ALSA TLV\nkcontrol interface, and similarly allowed over-reading adjacent heap\ndata on the get path.\n\nFix all bounds checks to subtract sizeof(*cdata) from max_size so they\nreflect the actual space available at the cdata->data offset. Also fix\nthe error-path restore in bytes_ext_put which wrote to cdata->data\ninstead of cdata, causing the same overflow.","Type":"Description","Title":"ASoC: SOF: ipc3-control: Fix heap overflow in bytes_ext put/get"}]}}}