{"id":"CVE-2026-72403","summary":"ALSA: FCP: Fix NULL pointer dereference in interface lookup","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: FCP: Fix NULL pointer dereference in interface lookup\n\nA malformed USB device can provide a vendor-specific interface without\nany endpoint descriptors. fcp_find_fc_interface() currently selects the\nfirst vendor-specific interface and reads endpoint 0 from it, without\nchecking whether the interface actually has any endpoints.\n\nWhen bNumEndpoints is zero, no endpoint array is allocated for the parsed\nalternate setting, so get_endpoint(..., 0) yields an invalid endpoint\ndescriptor pointer. Dereferencing it through usb_endpoint_num() then\ntriggers a NULL pointer dereference.\n\nSkip vendor-specific interfaces that do not have any endpoints.","modified":"2026-08-16T03:48:53.760336950Z","published":"2026-08-15T05:56:27.464Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72403.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3ab06151ffcb8c3aeb8f78508658b6c0f05be932"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e1e31e0ec8a609e17fd2e86b77bc00d9cbb24d7c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f28d7b5f1578a7501ab17b10643ed1e4f729187e"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72403.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72403"},{"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":"46757a3e7d50dac923888e7fbe68377736f13c70"},{"fixed":"f28d7b5f1578a7501ab17b10643ed1e4f729187e"},{"fixed":"3ab06151ffcb8c3aeb8f78508658b6c0f05be932"},{"fixed":"e1e31e0ec8a609e17fd2e86b77bc00d9cbb24d7c"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72403.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.14.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72403.json"}}],"schema_version":"1.9.0"}