{"id":"CVE-2026-64348","state":"PUBLISHED","title":"usb: free iso schedules on failed submit","description":"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->hcpriv 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->hcpriv.\n\nFree the staged schedule from done_not_linked when submit fails before\nthe URB is linked and clear urb->hcpriv 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.","publishedAt":"2026-07-25T08:50:08.983Z","updatedAt":"2026-10-30T12:27:48.179Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8de98402652c01839ae321be6cb3054cf5735d83","status":"affected","lessThan":"b0d00d077f9738d215af9b50c74dffab7a1de19f","versionType":"git"},{"version":"8de98402652c01839ae321be6cb3054cf5735d83","status":"affected","lessThan":"ab12316c4639237cc9d50c80a0c6240f11fbba3f","versionType":"git"},{"version":"8de98402652c01839ae321be6cb3054cf5735d83","status":"affected","lessThan":"be5004395dfd0b6ec310db359f887fa396fd0dd2","versionType":"git"},{"version":"8de98402652c01839ae321be6cb3054cf5735d83","status":"affected","lessThan":"8890699eea19027ef6e4f9cbcf27cba5e789793f","versionType":"git"},{"version":"8de98402652c01839ae321be6cb3054cf5735d83","status":"affected","lessThan":"6bc17a78a05671d303820224fb37ca339c1dc2cb","versionType":"git"},{"version":"8de98402652c01839ae321be6cb3054cf5735d83","status":"affected","lessThan":"4bb88aee6b868cbf73bf453f62497802f5fe4769","versionType":"git"},{"version":"8de98402652c01839ae321be6cb3054cf5735d83","status":"affected","lessThan":"b9399d25fbb34a05bbe76eeedd730f62ff2670e9","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/fotg210/fotg210-hcd.c","drivers/usb/host/ehci-sched.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.15","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.96","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/fotg210/fotg210-hcd.c","drivers/usb/host/ehci-sched.c"]}],"references":["https://git.kernel.org/stable/c/b0d00d077f9738d215af9b50c74dffab7a1de19f","https://git.kernel.org/stable/c/ab12316c4639237cc9d50c80a0c6240f11fbba3f","https://git.kernel.org/stable/c/be5004395dfd0b6ec310db359f887fa396fd0dd2","https://git.kernel.org/stable/c/8890699eea19027ef6e4f9cbcf27cba5e789793f","https://git.kernel.org/stable/c/6bc17a78a05671d303820224fb37ca339c1dc2cb","https://git.kernel.org/stable/c/4bb88aee6b868cbf73bf453f62497802f5fe4769","https://git.kernel.org/stable/c/b9399d25fbb34a05bbe76eeedd730f62ff2670e9"],"weaknesses":[],"ingestedAt":"2026-10-30T12:46:06.359Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64348.json","commit":"1f312381e38164a43607eebab851b151dd16861e","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64348","state":"PUBLISHED","datePublished":"2026-07-25T08:50:08.983Z","dateUpdated":"2026-10-30T12:27:48.179Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T15:36:31.782Z"},"containers":{"cna":{"title":"usb: free iso schedules on failed submit","descriptions":[{"lang":"en","value":"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->hcpriv 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->hcpriv.\n\nFree the staged schedule from done_not_linked when submit fails before\nthe URB is linked and clear urb->hcpriv 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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8de98402652c01839ae321be6cb3054cf5735d83","status":"affected","lessThan":"b0d00d077f9738d215af9b50c74dffab7a1de19f","versionType":"git"},{"version":"8de98402652c01839ae321be6cb3054cf5735d83","status":"affected","lessThan":"ab12316c4639237cc9d50c80a0c6240f11fbba3f","versionType":"git"},{"version":"8de98402652c01839ae321be6cb3054cf5735d83","status":"affected","lessThan":"be5004395dfd0b6ec310db359f887fa396fd0dd2","versionType":"git"},{"version":"8de98402652c01839ae321be6cb3054cf5735d83","status":"affected","lessThan":"8890699eea19027ef6e4f9cbcf27cba5e789793f","versionType":"git"},{"version":"8de98402652c01839ae321be6cb3054cf5735d83","status":"affected","lessThan":"6bc17a78a05671d303820224fb37ca339c1dc2cb","versionType":"git"},{"version":"8de98402652c01839ae321be6cb3054cf5735d83","status":"affected","lessThan":"4bb88aee6b868cbf73bf453f62497802f5fe4769","versionType":"git"},{"version":"8de98402652c01839ae321be6cb3054cf5735d83","status":"affected","lessThan":"b9399d25fbb34a05bbe76eeedd730f62ff2670e9","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/fotg210/fotg210-hcd.c","drivers/usb/host/ehci-sched.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.15","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.96","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/fotg210/fotg210-hcd.c","drivers/usb/host/ehci-sched.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/b0d00d077f9738d215af9b50c74dffab7a1de19f"},{"url":"https://git.kernel.org/stable/c/ab12316c4639237cc9d50c80a0c6240f11fbba3f"},{"url":"https://git.kernel.org/stable/c/be5004395dfd0b6ec310db359f887fa396fd0dd2"},{"url":"https://git.kernel.org/stable/c/8890699eea19027ef6e4f9cbcf27cba5e789793f"},{"url":"https://git.kernel.org/stable/c/6bc17a78a05671d303820224fb37ca339c1dc2cb"},{"url":"https://git.kernel.org/stable/c/4bb88aee6b868cbf73bf453f62497802f5fe4769"},{"url":"https://git.kernel.org/stable/c/b9399d25fbb34a05bbe76eeedd730f62ff2670e9"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:27:48.179Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.15","versionEndExcluding":"5.10.261"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.15","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.15","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.15","versionEndExcluding":"6.12.96"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.15","versionEndExcluding":"6.18.39"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.15","versionEndExcluding":"7.1.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.15","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}