{"id":"CVE-2026-93119","revision":"316797f5f29a4acaac1a5cdd59898678","records":[{"revision":"316797f5f29a4acaac1a5cdd59898678","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-93119","aliases":[],"title":"usb: ljca: bound bank_num in ljca_enumerate_gpio()","description":"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->bank_num from the device and loops\nvalid_pin[i] = get_unaligned_le32(...) for i < 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[].","state":0,"publishedAt":"2026-09-17T16:11:25.867+00:00","modifiedAt":"2026-10-19T09:05:52.849+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/usb/misc/usb-ljca.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"acd6199f195d6de814ac4090ce0864a613b1580e\",\n                            \"lessThan\": \"0069593170a3d177de793c9a0b36989c4f069111\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"acd6199f195d6de814ac4090ce0864a613b1580e\",\n                            \"lessThan\": \"aed958c4f784a29cf42abb3e54af51a16bddde46\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"acd6199f195d6de814ac4090ce0864a613b1580e\",\n                            \"lessThan\": \"9c4bc8f7426aa001387800bf0140bfc5087a6de3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"acd6199f195d6de814ac4090ce0864a613b1580e\",\n                            \"lessThan\": \"dd9483726d0f16c1a56879c3edb65128259a4e2b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/usb/misc/usb-ljca.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.7\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.7\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.52\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/0069593170a3d177de793c9a0b36989c4f069111","https://git.kernel.org/stable/c/aed958c4f784a29cf42abb3e54af51a16bddde46","https://git.kernel.org/stable/c/9c4bc8f7426aa001387800bf0140bfc5087a6de3","https://git.kernel.org/stable/c/dd9483726d0f16c1a56879c3edb65128259a4e2b"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-93119","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-93119","identifiers":["CVE-2026-93119"]},"retained":false,"historicalAffected":[]}],"coverage":[]}