{"id":"CVE-2026-64348","summary":"usb: free iso schedules on failed submit","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: free iso schedules on failed submit\n\nEHCI and FOTG210 isochronous submits build an ehci_iso_sched before\nlinking the URB to the endpoint queue, and keep the staged schedule in\nurb-\u003ehcpriv until iso_stream_schedule() and the link helpers consume it.\nIf the controller is no longer accessible, or usb_hcd_link_urb_to_ep()\nfails, submit jumps to done_not_linked before that handoff happens and\nleaks the staged schedule still attached to urb-\u003ehcpriv.\n\nFree the staged schedule from done_not_linked when submit fails before\nthe URB is linked and clear urb-\u003ehcpriv after the free.\n\nThe bug was first flagged by an experimental analysis tool we are\ndeveloping for kernel memory-management bugs while analyzing\nv6.13-rc1. The tool is still under development and is not yet publicly\navailable. Manual inspection confirms that the bug is still\npresent in v7.1.1.\n\nAn x86_64 allyesconfig build showed no new warnings. As we do not have an\nEHCI host controller with a USB isochronous device to test with, no\nruntime testing was able to be performed.","modified":"2026-07-27T04:03:21.816956650Z","published":"2026-07-25T08:50:08.983Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64348.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/4bb88aee6b868cbf73bf453f62497802f5fe4769"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6bc17a78a05671d303820224fb37ca339c1dc2cb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8890699eea19027ef6e4f9cbcf27cba5e789793f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b0d00d077f9738d215af9b50c74dffab7a1de19f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b9399d25fbb34a05bbe76eeedd730f62ff2670e9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/be5004395dfd0b6ec310db359f887fa396fd0dd2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64348.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64348"},{"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":"8de98402652c01839ae321be6cb3054cf5735d83"},{"fixed":"b0d00d077f9738d215af9b50c74dffab7a1de19f"},{"fixed":"be5004395dfd0b6ec310db359f887fa396fd0dd2"},{"fixed":"8890699eea19027ef6e4f9cbcf27cba5e789793f"},{"fixed":"6bc17a78a05671d303820224fb37ca339c1dc2cb"},{"fixed":"4bb88aee6b868cbf73bf453f62497802f5fe4769"},{"fixed":"b9399d25fbb34a05bbe76eeedd730f62ff2670e9"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64348.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.15"},{"fixed":"5.10.261"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"6.6.145"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.96"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.39"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64348.json"}}],"schema_version":"1.7.5"}