{"id":"CVE-2026-72262","summary":"ASoC: SOF: ipc3-control: Fix heap overflow in bytes_ext put/get","details":"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-\u003edata 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-\u003edata offset. Also fix\nthe error-path restore in bytes_ext_put which wrote to cdata-\u003edata\ninstead of cdata, causing the same overflow.","modified":"2026-08-18T03:56:40.008745419Z","published":"2026-08-15T05:54:49.635Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72262.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/121577383b5cf221e86581e0f2bcca4c66f17469"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1adde1941bba7b0d7104b86ed819d48d81cb0ad9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/eaa67e139c9217099e2a7b717aeeb46c65de3494"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f4933e1d11b97b6a0951648b7c3e53850e1b33a9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fd46668d538993218eea19c6925c868ac0f2630c"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72262.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72262"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"67ec2a091630c28ea8d05db2bd7178a05b04b7e6"},{"fixed":"1adde1941bba7b0d7104b86ed819d48d81cb0ad9"},{"fixed":"eaa67e139c9217099e2a7b717aeeb46c65de3494"},{"fixed":"121577383b5cf221e86581e0f2bcca4c66f17469"},{"fixed":"f4933e1d11b97b6a0951648b7c3e53850e1b33a9"},{"fixed":"fd46668d538993218eea19c6925c868ac0f2630c"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72262.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.18.0"},{"fixed":"6.6.145"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.97"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72262.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}