{ "document": { "category": "csaf_vex", "csaf_version": "2.0", "distribution": { "text": "TuxCare License Agreement", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://tuxcare.com/contact/", "name": "TuxCare", "namespace": "https://tuxcare.com/" }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://security.tuxcare.com/csaf/v2/els_os/debian10els/vex/2026/cve-2026-64583-els_os-debian10els.json" } ], "tracking": { "current_release_date": "2026-08-26T20:36:18Z", "generator": { "date": "2026-08-26T20:36:18Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2026-64583-ELS_OS-DEBIAN10ELS", "initial_release_date": "2026-08-06T08:16:00Z", "revision_history": [ { "date": "2026-08-06T08:16:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-08-25T12:52:22Z", "number": "2", "summary": "Official Publication" }, { "date": "2026-08-26T20:36:18Z", "number": "3", "summary": "Update document" } ], "status": "final", "version": "3" }, "title": "Security update on CVE-2026-64583" }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Debian 10", "product": { "name": "Debian 10", "product_id": "Debian-10", "product_identification_helper": { "cpe": "cpe:2.3:o:debian:debian_linux:10:*:*:*:*:*:*:*" } } } ], "category": "product_family", "name": "Debian" } ], "category": "vendor", "name": "Software in the Public Interest, Inc." }, { "branches": [ { "branches": [ { "category": "product_version", "name": "linux-headers-4.19.0-28-all-amd64-0:4.19.325-1+tuxcare.els1.amd64", "product": { "name": "linux-headers-4.19.0-28-all-amd64-0:4.19.325-1+tuxcare.els1.amd64", "product_id": "linux-headers-4.19.0-28-all-amd64-0:4.19.325-1+tuxcare.els1.amd64", "product_identification_helper": { "purl": "pkg:deb/tuxcare/linux-headers-4.19.0-28-all-amd64@4.19.325-1%2Btuxcare.els1?arch=amd64" } } }, { "category": "product_version", "name": 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"product_reference": "linux-headers-4.19.0-28-common-0:4.19.325-1+tuxcare.els1.all", "relates_to_product_reference": "Debian-10" }, { "category": "default_component_of", "full_product_name": { "name": "linux-cpupower-0:4.19.325-1+tuxcare.els1.amd64 as a component of Debian 10", "product_id": "Debian-10:linux-cpupower-0:4.19.325-1+tuxcare.els1.amd64" }, "product_reference": "linux-cpupower-0:4.19.325-1+tuxcare.els1.amd64", "relates_to_product_reference": "Debian-10" }, { "category": "default_component_of", "full_product_name": { "name": "linux-headers-4.19.0-28-amd64-0:4.19.325-1+tuxcare.els1.amd64 as a component of Debian 10", "product_id": "Debian-10:linux-headers-4.19.0-28-amd64-0:4.19.325-1+tuxcare.els1.amd64" }, "product_reference": "linux-headers-4.19.0-28-amd64-0:4.19.325-1+tuxcare.els1.amd64", "relates_to_product_reference": "Debian-10" }, { "category": "default_component_of", "full_product_name": { "name": "hyperv-daemons-0:4.19.325-1+tuxcare.els1.amd64 as a component of Debian 10", "product_id": "Debian-10:hyperv-daemons-0:4.19.325-1+tuxcare.els1.amd64" }, "product_reference": "hyperv-daemons-0:4.19.325-1+tuxcare.els1.amd64", "relates_to_product_reference": "Debian-10" }, { "category": "default_component_of", "full_product_name": { "name": "linux-image-4.19.0-28-amd64-unsigned-0:4.19.325-1+tuxcare.els1.amd64 as a component of Debian 10", "product_id": "Debian-10:linux-image-4.19.0-28-amd64-unsigned-0:4.19.325-1+tuxcare.els1.amd64" }, "product_reference": "linux-image-4.19.0-28-amd64-unsigned-0:4.19.325-1+tuxcare.els1.amd64", "relates_to_product_reference": "Debian-10" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-64583", "notes": [ { "category": "description", "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: udc: bdc: free IRQ and drain func_wake_notify before teardown\n\nThe Broadcom BDC UDC driver registers its IRQ handler with\ndevm_request_irq() in bdc_udc_init(), so the IRQ is released by devm\nonly after bdc_remove() returns. devm releases resources in reverse\nLIFO order, but bdc_remove() runs bdc_udc_exit() and bdc_hw_exit() ->\nbdc_mem_free() manually before returning: bdc_udc_exit() tears down\nindividual endpoint objects via bdc_free_ep(), while bdc_hw_exit() ->\nbdc_mem_free() frees and NULLs the DMA-coherent status-report ring\n(bdc->srr.sr_bds) and kfree()s bdc->bdc_ep_array. Both happen while\nthe IRQ handler (bdc_udc_interrupt, requested with IRQF_SHARED)\nremains deliverable in the window up to the post-remove devm\nfree_irq().\n\nOn receipt of a shared interrupt in that window, bdc_udc_interrupt()\ndereferences bdc->srr.sr_bds[bdc->srr.dqp_index] (NULL or freed DMA)\nand dispatches sr_handler callbacks that index into bdc_ep_array,\ncausing a NULL-deref or use-after-free.\n\nThe same window affects the delayed_work bdc->func_wake_notify, which is\narmed from the IRQ handler via bdc_sr_uspc() -> handle_link_state_change()\n-> schedule_delayed_work() and may self-rearm from its own callback\nbdc_func_wake_timer(). No cancel exists anywhere in the driver, so a\nqueued work item that fires after bdc_remove() returns and the bdc\nstructure is devm-freed dereferences freed memory.\n\nReplace devm_request_irq() with request_irq() and add an explicit\nfree_irq(bdc->irq, bdc) in bdc_remove(). Clear BDC_GIE before\nfree_irq() to stop the device from asserting interrupts, then\nfree_irq() drains any in-flight handler, then cancel_delayed_work_sync()\ndrains the func_wake_notify delayed work. This ordering ensures the\nIRQ handler and delayed work cannot interfere with the subsequent\nendpoint and DMA teardown in bdc_udc_exit() and bdc_hw_exit(). Wire the\nmatching free_irq() into the bdc_udc_init() error path so the IRQ is\nreleased on probe failure, and route the bdc_init_ep() failure through\nerr0 instead of returning directly.\n\nThis issue was found by an in-house static analysis tool.", "title": "Vulnerability description" }, { "category": "other", "text": "TuxCare has assessed that this vulnerability does not impact any currently supported TuxCare products. This evaluation may change as new information becomes available. For additional details regarding this vulnerability and affected products, refer to the provided references.", "title": "Statement" } ], "product_status": { "known_not_affected": [ "Debian-10:hyperv-daemons-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:libbpf-dev-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:libbpf4.19-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:libcpupower-dev-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:libcpupower1-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:linux-compiler-gcc-8-x86-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:linux-config-4.19-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:linux-cpupower-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:linux-doc-4.19-0:4.19.325-1+tuxcare.els1.all", "Debian-10:linux-headers-4.19.0-28-all-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:linux-headers-4.19.0-28-all-amd64-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:linux-headers-4.19.0-28-amd64-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:linux-headers-4.19.0-28-common-0:4.19.325-1+tuxcare.els1.all", "Debian-10:linux-image-4.19.0-28-amd64-unsigned-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:linux-image-amd64-signed-template-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:linux-kbuild-4.19-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:linux-libc-dev-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:linux-perf-4.19-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:linux-source-4.19-0:4.19.325-1+tuxcare.els1.all", "Debian-10:linux-support-4.19.0-28-0:4.19.325-1+tuxcare.els1.all" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2026-64583" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/0583f2fbf8f86ae3a0ce054f96783dd83e65d9bb", "url": "https://git.kernel.org/stable/c/0583f2fbf8f86ae3a0ce054f96783dd83e65d9bb" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/0b0b76e31b3991a899ae724eb97d359de0c0f1b1", "url": "https://git.kernel.org/stable/c/0b0b76e31b3991a899ae724eb97d359de0c0f1b1" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/1a1d7158420df6b8fa1efc0cdd6ab704801a4fc8", "url": "https://git.kernel.org/stable/c/1a1d7158420df6b8fa1efc0cdd6ab704801a4fc8" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/3fe181952b8a1aeb167d4503c794c0f5050f08ed", "url": "https://git.kernel.org/stable/c/3fe181952b8a1aeb167d4503c794c0f5050f08ed" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/d4964a74717107697999f48bcb4e80a9c0679a27", "url": "https://git.kernel.org/stable/c/d4964a74717107697999f48bcb4e80a9c0679a27" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/dcf3e2f164435b5844706cb8eefef29ebee0eedb", "url": "https://git.kernel.org/stable/c/dcf3e2f164435b5844706cb8eefef29ebee0eedb" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/eac1107e54679db2df2c36d8bba3b66d3ab6cbcd", "url": "https://git.kernel.org/stable/c/eac1107e54679db2df2c36d8bba3b66d3ab6cbcd" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/f6fc21ec7ccd83726ba766d73d0b8cc03e726475", "url": "https://git.kernel.org/stable/c/f6fc21ec7ccd83726ba766d73d0b8cc03e726475" } ], "release_date": "2026-08-06T08:16:00Z", "threats": [ { "category": "impact", "details": "Moderate" }, { "category": "impact", "date": "2026-08-26T18:31:31.132981Z", "details": "The affected code is the Broadcom BDC USB device-controller driver (drivers/usb/gadget/udc/bdc/, bdc_core.c and bdc_udc.c), compiled into bdc.o only when CONFIG_USB_BDC_UDC is enabled. That option is \"# CONFIG_USB_BDC_UDC is not set\" in the shipped debian10els kernel configuration, so the driver is never built on any shipped arch (amd64, arm64, armel); kettle built-status reports both objects as skipped on all three.", "product_ids": [ "Debian-10:hyperv-daemons-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:libbpf-dev-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:libbpf4.19-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:libcpupower-dev-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:libcpupower1-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:linux-compiler-gcc-8-x86-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:linux-config-4.19-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:linux-cpupower-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:linux-doc-4.19-0:4.19.325-1+tuxcare.els1.all", "Debian-10:linux-headers-4.19.0-28-all-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:linux-headers-4.19.0-28-all-amd64-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:linux-headers-4.19.0-28-amd64-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:linux-headers-4.19.0-28-common-0:4.19.325-1+tuxcare.els1.all", "Debian-10:linux-image-4.19.0-28-amd64-unsigned-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:linux-image-amd64-signed-template-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:linux-kbuild-4.19-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:linux-libc-dev-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:linux-perf-4.19-0:4.19.325-1+tuxcare.els1.amd64", "Debian-10:linux-source-4.19-0:4.19.325-1+tuxcare.els1.all", "Debian-10:linux-support-4.19.0-28-0:4.19.325-1+tuxcare.els1.all" ] } ] } ] }