{"id":"CVE-2026-64465","state":"PUBLISHED","title":"usb: xhci: Fix sleep in atomic context in xhci_free_streams()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: xhci: Fix sleep in atomic context in xhci_free_streams()\n\nWhen a USB device with active stream endpoints is disconnected,\nxhci_free_streams() is called from the hub_event workqueue to\nfree the stream resources.  It calls xhci_free_stream_info()\nwhile holding xhci->lock with irqs disabled.\n\nxhci_free_stream_info() invokes xhci_free_stream_ctx(), which\ncalls dma_free_coherent() for large stream context arrays.\n\ndma_free_coherent() can sleep (e.g. via vunmap), triggering\na BUG when called from atomic context.\n\nCall trace:\n dma_free_attrs+0x174/0x220\n xhci_free_stream_info+0xd0/0x11c\n xhci_free_streams+0x278/0x37c\n usb_free_streams+0x98/0xc0\n usb_unbind_interface+0x1b8/0x2f8\n device_release_driver_internal+0x1d4/0x2cc\n device_release_driver+0x18/0x28\n bus_remove_device+0x160/0x1a4\n device_del+0x1ec/0x350\n usb_disable_device+0x98/0x214\n usb_disconnect+0xf0/0x35c\n hub_event+0xab4/0x19ec\n process_one_work+0x278/0x63c\n\nFix this by saving the stream_info pointers and clearing the\nep references under the lock, then calling xhci_free_stream_info()\noutside the lock where sleeping is allowed.","publishedAt":"2026-07-25T08:51:31.160Z","updatedAt":"2026-08-17T04:56:10.537Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8df75f42f8e67e2851cdcf6da91640fb881defd1","status":"affected","lessThan":"e623e4a203f56d5c57519a9a3cb29600551534ad","versionType":"git"},{"version":"8df75f42f8e67e2851cdcf6da91640fb881defd1","status":"affected","lessThan":"d107eb316144c5fb958486e7fe604cd7f1b35cda","versionType":"git"},{"version":"8df75f42f8e67e2851cdcf6da91640fb881defd1","status":"affected","lessThan":"1e45aa722c4ce5663e987102aac18c8ad6a83fdd","versionType":"git"},{"version":"8df75f42f8e67e2851cdcf6da91640fb881defd1","status":"affected","lessThan":"10666ac9c552990204e791af653abf8e9d9ff619","versionType":"git"},{"version":"8df75f42f8e67e2851cdcf6da91640fb881defd1","status":"affected","lessThan":"f7b022ae07685e7526fc39f387ce65b5d309dd3b","versionType":"git"},{"version":"8df75f42f8e67e2851cdcf6da91640fb881defd1","status":"affected","lessThan":"f90586129cf9e1fbdb718ef602eea3f15dc1c31c","versionType":"git"},{"version":"8df75f42f8e67e2851cdcf6da91640fb881defd1","status":"affected","lessThan":"93cd037da94fcb93183bfb2457e3a56d3eb4c8f4","versionType":"git"},{"version":"8df75f42f8e67e2851cdcf6da91640fb881defd1","status":"affected","lessThan":"42c37c4b75d38b51d84f31a8e29427f5e06a7c2a","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/host/xhci.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.35","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.35","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","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/host/xhci.c"]}],"references":["https://git.kernel.org/stable/c/e623e4a203f56d5c57519a9a3cb29600551534ad","https://git.kernel.org/stable/c/d107eb316144c5fb958486e7fe604cd7f1b35cda","https://git.kernel.org/stable/c/1e45aa722c4ce5663e987102aac18c8ad6a83fdd","https://git.kernel.org/stable/c/10666ac9c552990204e791af653abf8e9d9ff619","https://git.kernel.org/stable/c/f7b022ae07685e7526fc39f387ce65b5d309dd3b","https://git.kernel.org/stable/c/f90586129cf9e1fbdb718ef602eea3f15dc1c31c","https://git.kernel.org/stable/c/93cd037da94fcb93183bfb2457e3a56d3eb4c8f4","https://git.kernel.org/stable/c/42c37c4b75d38b51d84f31a8e29427f5e06a7c2a"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64465.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64465","state":"PUBLISHED","datePublished":"2026-07-25T08:51:31.160Z","dateUpdated":"2026-08-17T04:56:10.537Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T15:36:31.790Z"},"containers":{"cna":{"title":"usb: xhci: Fix sleep in atomic context in xhci_free_streams()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: xhci: Fix sleep in atomic context in xhci_free_streams()\n\nWhen a USB device with active stream endpoints is disconnected,\nxhci_free_streams() is called from the hub_event workqueue to\nfree the stream resources.  It calls xhci_free_stream_info()\nwhile holding xhci->lock with irqs disabled.\n\nxhci_free_stream_info() invokes xhci_free_stream_ctx(), which\ncalls dma_free_coherent() for large stream context arrays.\n\ndma_free_coherent() can sleep (e.g. via vunmap), triggering\na BUG when called from atomic context.\n\nCall trace:\n dma_free_attrs+0x174/0x220\n xhci_free_stream_info+0xd0/0x11c\n xhci_free_streams+0x278/0x37c\n usb_free_streams+0x98/0xc0\n usb_unbind_interface+0x1b8/0x2f8\n device_release_driver_internal+0x1d4/0x2cc\n device_release_driver+0x18/0x28\n bus_remove_device+0x160/0x1a4\n device_del+0x1ec/0x350\n usb_disable_device+0x98/0x214\n usb_disconnect+0xf0/0x35c\n hub_event+0xab4/0x19ec\n process_one_work+0x278/0x63c\n\nFix this by saving the stream_info pointers and clearing the\nep references under the lock, then calling xhci_free_stream_info()\noutside the lock where sleeping is allowed."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8df75f42f8e67e2851cdcf6da91640fb881defd1","status":"affected","lessThan":"e623e4a203f56d5c57519a9a3cb29600551534ad","versionType":"git"},{"version":"8df75f42f8e67e2851cdcf6da91640fb881defd1","status":"affected","lessThan":"d107eb316144c5fb958486e7fe604cd7f1b35cda","versionType":"git"},{"version":"8df75f42f8e67e2851cdcf6da91640fb881defd1","status":"affected","lessThan":"1e45aa722c4ce5663e987102aac18c8ad6a83fdd","versionType":"git"},{"version":"8df75f42f8e67e2851cdcf6da91640fb881defd1","status":"affected","lessThan":"10666ac9c552990204e791af653abf8e9d9ff619","versionType":"git"},{"version":"8df75f42f8e67e2851cdcf6da91640fb881defd1","status":"affected","lessThan":"f7b022ae07685e7526fc39f387ce65b5d309dd3b","versionType":"git"},{"version":"8df75f42f8e67e2851cdcf6da91640fb881defd1","status":"affected","lessThan":"f90586129cf9e1fbdb718ef602eea3f15dc1c31c","versionType":"git"},{"version":"8df75f42f8e67e2851cdcf6da91640fb881defd1","status":"affected","lessThan":"93cd037da94fcb93183bfb2457e3a56d3eb4c8f4","versionType":"git"},{"version":"8df75f42f8e67e2851cdcf6da91640fb881defd1","status":"affected","lessThan":"42c37c4b75d38b51d84f31a8e29427f5e06a7c2a","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/host/xhci.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.35","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.35","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","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/host/xhci.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/e623e4a203f56d5c57519a9a3cb29600551534ad"},{"url":"https://git.kernel.org/stable/c/d107eb316144c5fb958486e7fe604cd7f1b35cda"},{"url":"https://git.kernel.org/stable/c/1e45aa722c4ce5663e987102aac18c8ad6a83fdd"},{"url":"https://git.kernel.org/stable/c/10666ac9c552990204e791af653abf8e9d9ff619"},{"url":"https://git.kernel.org/stable/c/f7b022ae07685e7526fc39f387ce65b5d309dd3b"},{"url":"https://git.kernel.org/stable/c/f90586129cf9e1fbdb718ef602eea3f15dc1c31c"},{"url":"https://git.kernel.org/stable/c/93cd037da94fcb93183bfb2457e3a56d3eb4c8f4"},{"url":"https://git.kernel.org/stable/c/42c37c4b75d38b51d84f31a8e29427f5e06a7c2a"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T04:56:10.537Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.35","versionEndExcluding":"5.10.261"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.35","versionEndExcluding":"5.15.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.35","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.35","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.35","versionEndExcluding":"6.12.96"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.35","versionEndExcluding":"6.18.39"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.35","versionEndExcluding":"7.1.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.35","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}