CVE-2026-72262 - Vulnerability Details

Vendors	Products
Linux	Linux Kernel

Link	Providers
https://git.kernel.org/stable/c/121577383b5cf221e86581e0f2bcca4c66f17469
https://git.kernel.org/stable/c/1adde1941bba7b0d7104b86ed819d48d81cb0ad9
https://git.kernel.org/stable/c/eaa67e139c9217099e2a7b717aeeb46c65de3494
https://git.kernel.org/stable/c/f4933e1d11b97b6a0951648b7c3e53850e1b33a9
https://git.kernel.org/stable/c/fd46668d538993218eea19c6925c868ac0f2630c

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: ASoC: SOF: ipc3-control: Fix heap overflow in bytes_ext put/get The ipc_control_data buffer is allocated as kzalloc(max_size), where max_size covers the entire struct sof_ipc_ctrl_data including its flexible array payload. However, the bounds checks in bytes_ext_put and _bytes_ext_get compared user data lengths against max_size directly, ignoring that cdata->data sits at an offset of sizeof(struct sof_ipc_ctrl_data) bytes into the allocation. This allowed writing up to sizeof(struct sof_ipc_ctrl_data) bytes past the end of the heap buffer from unprivileged userspace via the ALSA TLV kcontrol interface, and similarly allowed over-reading adjacent heap data on the get path. Fix all bounds checks to subtract sizeof(*cdata) from max_size so they reflect the actual space available at the cdata->data offset. Also fix the error-path restore in bytes_ext_put which wrote to cdata->data instead of cdata, causing the same overflow.
Title		ASoC: SOF: ipc3-control: Fix heap overflow in bytes_ext put/get
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/121577383b5cf221e86581e0f2bcca4c66f17469 https://git.kernel.org/stable/c/1adde1941bba7b0d7104b86ed819d48d81cb0ad9 https://git.kernel.org/stable/c/eaa67e139c9217099e2a7b717aeeb46c65de3494 https://git.kernel.org/stable/c/f4933e1d11b97b6a0951648b7c3e53850e1b33a9 https://git.kernel.org/stable/c/fd46668d538993218eea19c6925c868ac0f2630c

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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": "1adde1941bba7b0d7104b86ed819d48d81cb0ad9", "status": "affected", "version": "67ec2a091630c28ea8d05db2bd7178a05b04b7e6", "versionType": "git"}, {"lessThan": "eaa67e139c9217099e2a7b717aeeb46c65de3494", "status": "affected", "version": "67ec2a091630c28ea8d05db2bd7178a05b04b7e6", "versionType": "git"}, {"lessThan": "121577383b5cf221e86581e0f2bcca4c66f17469", "status": "affected", "version": "67ec2a091630c28ea8d05db2bd7178a05b04b7e6", "versionType": "git"}, {"lessThan": "f4933e1d11b97b6a0951648b7c3e53850e1b33a9", "status": "affected", "version": "67ec2a091630c28ea8d05db2bd7178a05b04b7e6", "versionType": "git"}, {"lessThan": "fd46668d538993218eea19c6925c868ac0f2630c", "status": "affected", "version": "67ec2a091630c28ea8d05db2bd7178a05b04b7e6", "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": "6.6.*", "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-rc1", "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 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."}], "id": "CVE-2026-72262", "lastModified": "2026-08-15T06:21:54.443", "metrics": {}, "published": "2026-08-15T06:21:54.443", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/121577383b5cf221e86581e0f2bcca4c66f17469"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1adde1941bba7b0d7104b86ed819d48d81cb0ad9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/eaa67e139c9217099e2a7b717aeeb46c65de3494"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f4933e1d11b97b6a0951648b7c3e53850e1b33a9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fd46668d538993218eea19c6925c868ac0f2630c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

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