{"id":"CVE-2026-72262","aliases":[],"url":"https://o3.security/vulnerability/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->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.","published":"2026-08-15T05:54:49.635Z","modified":"2026-08-16T03:48:37.395247044Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.6.145"}],"fix":null,"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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-16T03:48:37.395247044Z"}}