{"id":"CVE-2026-93119","summary":"usb: ljca: bound bank_num in ljca_enumerate_gpio()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: ljca: bound bank_num in ljca_enumerate_gpio()\n\nljca_enumerate_gpio() reads desc-\u003ebank_num from the device and loops\nvalid_pin[i] = get_unaligned_le32(...) for i \u003c bank_num. valid_pin[]\nholds only LJCA_MAX_GPIO_NUM / 32 = 2 entries.\n\nTwo checks run before the loop. The reply length must match\nstruct_size(desc, bank_desc, bank_num). The product\npins_per_bank * bank_num must not exceed LJCA_MAX_GPIO_NUM. Neither one\nbounds bank_num against the size of valid_pin[]. The reply is capped at\nLJCA_MAX_PAYLOAD_SIZE (60) bytes, so the struct_size check limits\nbank_num to 9. A device that reports bank_num 9 with pins_per_bank 7\nstill passes both checks. gpio_num is 63 and the reply is 56 bytes. The\nloop then writes nine u32 into the two entry array and overruns\nvalid_pin[] on the stack.\n\nA broken or malicious LJCA device can therefore overflow the stack.\nReject a bank_num that does not fit valid_pin[].","modified":"2026-09-19T03:47:31.507493511Z","published":"2026-09-17T16:11:25.867Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93119.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0069593170a3d177de793c9a0b36989c4f069111"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9c4bc8f7426aa001387800bf0140bfc5087a6de3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/aed958c4f784a29cf42abb3e54af51a16bddde46"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dd9483726d0f16c1a56879c3edb65128259a4e2b"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93119.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93119"},{"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":"acd6199f195d6de814ac4090ce0864a613b1580e"},{"fixed":"0069593170a3d177de793c9a0b36989c4f069111"},{"fixed":"aed958c4f784a29cf42abb3e54af51a16bddde46"},{"fixed":"9c4bc8f7426aa001387800bf0140bfc5087a6de3"},{"fixed":"dd9483726d0f16c1a56879c3edb65128259a4e2b"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93119.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"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-2026-93119.json"}}],"schema_version":"1.9.0"}