{ "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-2026-68372-els_os-debian10els.json" } ], "tracking": { "current_release_date": "2026-08-25T12:52:56Z", "generator": { "date": "2026-08-25T12:52:56Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2026-68372-ELS_OS-DEBIAN10ELS", "initial_release_date": "2026-08-10T13:20:00Z", "revision_history": [ { "date": "2026-08-10T13:20:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-08-25T12:52:56Z", "number": "2", "summary": "Official Publication" } ], "status": "final", "version": "2" }, "title": "Security update on CVE-2026-68372" }, "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": "linux-libc-dev-0:4.19.325-1+tuxcare.els1.amd64", "product": { "name": 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} } } ], "category": "architecture", "name": "all" } ], "category": "vendor", "name": "TuxCare" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "linux-headers-4.19.0-28-all-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-all-amd64-0:4.19.325-1+tuxcare.els1.amd64" }, "product_reference": "linux-headers-4.19.0-28-all-amd64-0:4.19.325-1+tuxcare.els1.amd64", "relates_to_product_reference": "Debian-10" }, { "category": "default_component_of", "full_product_name": { "name": "linux-libc-dev-0:4.19.325-1+tuxcare.els1.amd64 as a component of Debian 10", "product_id": "Debian-10:linux-libc-dev-0:4.19.325-1+tuxcare.els1.amd64" }, "product_reference": "linux-libc-dev-0:4.19.325-1+tuxcare.els1.amd64", "relates_to_product_reference": "Debian-10" }, { "category": "default_component_of", "full_product_name": { "name": "libcpupower1-0:4.19.325-1+tuxcare.els1.amd64 as a component of Debian 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"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-2026-68372", "notes": [ { "category": "description", "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: core: port: Deattach Type-C connector on component unbind\n\nconnector_unbind() is the mirror of connector_bind(), but it is missing\nthe symmetric call to typec_deattach() that connector_bind() makes via:\n\n if (port_dev->child)\n typec_attach(port_dev->connector, &port_dev->child->dev);\n\nWhen a Thunderbolt dock is unplugged, two teardown paths race:\n\n1. The component framework calls connector_unbind() first, which sets\n port_dev->connector = NULL without calling typec_deattach(). This\n leaves port->usb2_dev/port->usb3_dev in struct typec_port pointing at\n the USB device that is about to be freed.\n\n2. usb_disconnect() then calls typec_deattach(port_dev->connector, ...),\n but port_dev->connector is already NULL, so the call is a no-op and\n port->usb2_dev is never cleared.\n\n3. Concurrently, UCSI detects a PD partner-disconnect event and calls\n typec_unregister_partner(), which reads port->usb2_dev (now a dangling\n pointer to freed memory) and passes it to typec_partner_unlink_device()\n -> sysfs_remove_link() -> dev_name() on the freed device, corrupting\n the typec/UCSI partner state.\n\nThis corruption leaves the Thunderbolt tunnel in an inconsistent state on\nthe next dock hot-plug. On affected hardware the dock's I225/igc NIC fails\nto enumerate: AER fires a slot reset while the igc driver is still\ninitialising (\"PCIe link lost\"), and the subsequent igc_reset attempt hits\nigc_rd32 on an already-detached device:\n\n igc 0000:2e:00.0 eth0: PCIe link lost, device now detached\n igc: Failed to read reg 0x0!\n WARNING: CPU: 9 PID: 129 at drivers/net/ethernet/intel/igc/igc_main.c:7005\n igc_rd32+0xa4/0xc0 [igc]\n Call Trace:\n igc_disable_pcie_master+0x16/0xa0 [igc]\n igc_reset_hw_base+0x14/0x170 [igc]\n igc_reset+0x63/0x110 [igc]\n igc_io_slot_reset+0x9e/0xd0 [igc]\n report_slot_reset+0x5d/0xc0\n pcie_do_recovery+0x209/0x400\n aer_isr_one_error_type+0x235/0x430\n aer_isr+0x4e/0x80\n irq_thread+0xf4/0x1f0\n\n4. UCSI later handles the PD partner-disconnect and calls\n typec_unregister_partner(), which still sees the stale port->usb2_dev\n and tries to remove its sysfs link a second time:\n\n kernfs: can not remove 'typec', no directory\n WARNING: CPU: 6 PID: 55 at fs/kernfs/dir.c:1706 kernfs_remove_by_name_ns+0xe9/0xf0\n Workqueue: events ucsi_handle_connector_change [typec_ucsi]\n Call Trace:\n sysfs_remove_link+0x19/0x50\n typec_unregister_partner+0x6e/0x120 [typec]\n ucsi_unregister_partner+0x107/0x150 [typec_ucsi]\n ucsi_handle_connector_change+0x3ec/0x490 [typec_ucsi]\n process_one_work+0x18e/0x3e0\n worker_thread+0x2e3/0x420\n kthread+0x10a/0x230\n ret_from_fork+0x121/0x140\n ret_from_fork_asm+0x1a/0x30\n\n With worse timing the same stale pointer is dereferenced after the\n backing memory is freed, turning the warning into a use-after-free.\n\nFix the asymmetry: call typec_deattach() before clearing\nport_dev->connector, matching what connector_bind() does on the bind side.\ntypec_partner_deattach() is already protected by port->partner_link_lock,\nso it serialises safely with the concurrent typec_unregister_partner() path.", "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-2026-68372" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/7714fb896ed308cf13d32d317040adc4f200b8e4", "url": "https://git.kernel.org/stable/c/7714fb896ed308cf13d32d317040adc4f200b8e4" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/78d361e60caf1999d51bda0e1b1004f5d39fcfbc", "url": "https://git.kernel.org/stable/c/78d361e60caf1999d51bda0e1b1004f5d39fcfbc" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/e00109b5adf71635919248e9ab6300a662e6a3e8", "url": "https://git.kernel.org/stable/c/e00109b5adf71635919248e9ab6300a662e6a3e8" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/e0b291fe117964037e0ba382eff4bb365d531c3a", "url": "https://git.kernel.org/stable/c/e0b291fe117964037e0ba382eff4bb365d531c3a" } ], "release_date": "2026-08-10T13:20:00Z", "threats": [ { "category": "impact", "details": "Moderate" }, { "category": "impact", "date": "2026-08-22T12:53:54.274937Z", "details": "CVE-2026-68372 is not applicable to debian10els. It concerns a use-after-free in the USB core Type-C connector class linkage (connector_unbind not detaching the enumerated USB device). The mechanism that links enumerated USB devices to the Type-C class (connector_bind/connector_unbind and port->usb2_dev/usb3_dev) was introduced upstream well after the 4.19 base and is not present in this kernel's USB core.", "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" ] } ] } ] }