{"id":"CVE-2026-93808","revision":"d703eb6034df424482c0a07e206da603","records":[{"revision":"d703eb6034df424482c0a07e206da603","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-93808","aliases":[],"title":"ALSA: usb-audio: caiaq: validate EP1 reply lengths","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: caiaq: validate EP1 reply lengths\n\nusb_ep1_command_reply_dispatch() uses buf[0] as a command byte and then\nreads command-specific fixed items from the same URB buffer. Several\npaths use buf + 1, buf[1], buf[2], or buf + 3 without first proving that\nurb->actual_length contains those bytes.\n\nAdd per-command length checks, use a payload length derived from the\nbytes after the command byte for the control-state copy, and reject short\nanalog input payloads before the input helper reads fixed offsets from\nthe EP1 reply.","state":0,"publishedAt":"2026-09-24T16:02:43.621+00:00","modifiedAt":"2026-10-03T10:57:41.411+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                        \"sound/usb/caiaq/device.c\",\n                        \"sound/usb/caiaq/input.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"523f1dce37434a9a6623bf46e7893e2b4b10ac3c\",\n                            \"lessThan\": \"91acd231f219452fa58285239f83945accad9513\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"523f1dce37434a9a6623bf46e7893e2b4b10ac3c\",\n                            \"lessThan\": \"7cc6b3745a0cea697c8d0684b3094f220281a08d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"523f1dce37434a9a6623bf46e7893e2b4b10ac3c\",\n                            \"lessThan\": \"add9328c91c195c494cd68a21b19e5e47a20d784\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"523f1dce37434a9a6623bf46e7893e2b4b10ac3c\",\n                            \"lessThan\": \"319393151367e6626affedcdd4f7b7b0286f4246\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"523f1dce37434a9a6623bf46e7893e2b4b10ac3c\",\n                            \"lessThan\": \"af8a172c4f71ac30d625f2966d2389a7fa872819\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"523f1dce37434a9a6623bf46e7893e2b4b10ac3c\",\n                            \"lessThan\": \"74f3c639f64fa5da4e1613149798b5089bce2807\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"523f1dce37434a9a6623bf46e7893e2b4b10ac3c\",\n                            \"lessThan\": \"aba30af07d4fe499b50209801eba9da8a815522f\",\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                        \"sound/usb/caiaq/device.c\",\n                        \"sound/usb/caiaq/input.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.22\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.22\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.271\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.222\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.189\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.158\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.111\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.53\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/91acd231f219452fa58285239f83945accad9513","https://git.kernel.org/stable/c/7cc6b3745a0cea697c8d0684b3094f220281a08d","https://git.kernel.org/stable/c/add9328c91c195c494cd68a21b19e5e47a20d784","https://git.kernel.org/stable/c/319393151367e6626affedcdd4f7b7b0286f4246","https://git.kernel.org/stable/c/af8a172c4f71ac30d625f2966d2389a7fa872819","https://git.kernel.org/stable/c/74f3c639f64fa5da4e1613149798b5089bce2807","https://git.kernel.org/stable/c/aba30af07d4fe499b50209801eba9da8a815522f"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-93808","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-93808","identifiers":["CVE-2026-93808"]},"retained":false,"historicalAffected":[]}],"coverage":[]}