{"id":"CVE-2026-90022","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-90022","summary":"usb: gadget: f_midi2: fix use-after-free in string attribute show path","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_midi2: fix use-after-free in string attribute show path\n\nf_midi2_opts_str_show() takes the string lock internally, but its\ncallers dereference the opts->info.<field> pointer before calling it,\noutside the lock. This races with f_midi2_opts_str_store(), which\nfrees the old string under opts->lock when the attribute is written\nconcurrently, the show path can read a pointer that gets freed\nbefore the lock inside str_show() is even taken.\n\nChange f_midi2_opts_str_show() to take a pointer to the string field,\nmatching the existing pattern in f_midi2_opts_str_store(), and\ndereference it only after the lock is held. Update all three callers\n(iface_name, block name, and the EP string option macro) accordingly.","published":"2026-09-16T10:33:26.238Z","modified":"2026-09-17T03:47:20.542403234Z","cvss":{"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"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.6.157"}],"fix":null,"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/49fab5e1bdb205c36c965d0e9677bc40d282d3a2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d11f3300b39e2daad2f0d9d66ddcc39a156cb594"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e89e30f0b5d3004fe5955250bd8b04f3733e32ce"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f9bdf4c4f6410a1dfafafa383a0e21069372657f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fed0aa7c6eaedc6c0d4e362fc91724aa47be4a7b"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90022.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90022"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-17T03:47:20.542403234Z"}}