{"id":"CVE-2026-93120","summary":"usb: gadget: configfs: fix out-of-bounds read of qw_sign","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: configfs: fix out-of-bounds read of qw_sign\n\nos_desc_qw_sign_show() passes OS_STRING_QW_SIGN_LEN as the input\nlength to utf16s_to_utf8s(), but that argument counts UTF-16 code\nunits while OS_STRING_QW_SIGN_LEN (14) is the byte size of qw_sign[].\nThe array holds only OS_STRING_QW_SIGN_LEN / 2 (7) code units, so the\nconversion reads up to 7 units (14 bytes) past the end of qw_sign[]\ninto the following members of struct gadget_info when the stored\nsignature fills the array without a NUL terminator, exposing those\nbytes through the configfs attribute.\n\nThe store path halves the count for its input bound but passes the\nfull byte count as the utf8s_to_utf16s() output limit; use the\ndestination code-unit count in both directions.","modified":"2026-09-18T03:47:05.011266923Z","published":"2026-09-17T16:11:26.548Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93120.json"},"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/36315a330e067f7773196940552feacb1debbef1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7e94cb967778e074411940db4db97f22ed77560c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9b45125501aad2dff7730970461b455b0e0658ee"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a28c486434634f6d1e120711d2b09f3eddea6c98"},{"type":"WEB","url":"https://git.kernel.org/stable/c/afbf39c0f2297c6abef6d670a82a2079b0836191"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b895dbed8ac9e12a5ffa1a2165575a8469f8340d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f63edb54d8f738f9c21e2068c777ae1c097df6b7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f6da500b0f8106882598b6dec87fe37d653946cf"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93120.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93120"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"76180d716f91f035d9c8639497cf5459b44e1a51"},{"fixed":"b895dbed8ac9e12a5ffa1a2165575a8469f8340d"},{"fixed":"9b45125501aad2dff7730970461b455b0e0658ee"},{"fixed":"f6da500b0f8106882598b6dec87fe37d653946cf"},{"fixed":"a28c486434634f6d1e120711d2b09f3eddea6c98"},{"fixed":"7e94cb967778e074411940db4db97f22ed77560c"},{"fixed":"afbf39c0f2297c6abef6d670a82a2079b0836191"},{"fixed":"36315a330e067f7773196940552feacb1debbef1"},{"fixed":"f63edb54d8f738f9c21e2068c777ae1c097df6b7"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93120.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.13.0"},{"fixed":"5.10.270"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.221"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.188"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.157"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.110"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.52"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93120.json"}}],"schema_version":"1.9.0"}