{"id":"CVE-2026-72262","title":"ASoC: SOF: ipc3-control: Fix heap overflow in bytes_ext put/get","summary":"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 …","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 < af4b437a463ac0482ba705434a44da06783778e6","Linux >= 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 < 1adde1941bba7b0d7104b86ed819d48d81cb0ad9","Linux >= 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 < eaa67e139c9217099e2a7b717aeeb46c65de3494","Linux >= 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 < 121577383b5cf221e86581e0f2bcca4c66f17469","Linux >= 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 < f4933e1d11b97b6a0951648b7c3e53850e1b33a9","Linux >= 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 < fd46668d538993218eea19c6925c868ac0f2630c","Linux 5.18"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T18:45:34.306028Z"},"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T18:55:14.172Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72262","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"}],"tags":["cve.org"],"epss":0.00182,"epssPercentile":0.0729,"ingestedAt":"2026-10-16T19:46:24.414Z","slug":"CVE-2026-72262","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 < af4b437a463ac0482ba705434a44da06783778e6`\n- `Linux >= 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 < 1adde1941bba7b0d7104b86ed819d48d81cb0ad9`\n- `Linux >= 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 < eaa67e139c9217099e2a7b717aeeb46c65de3494`\n- `Linux >= 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 < 121577383b5cf221e86581e0f2bcca4c66f17469`\n- `Linux >= 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 < f4933e1d11b97b6a0951648b7c3e53850e1b33a9`\n- `Linux >= 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 < fd46668d538993218eea19c6925c868ac0f2630c`\n- `Linux 5.18`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}