{ "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-2026-68189-els_os-debian10els.json" } ], "tracking": { "current_release_date": "2026-08-25T12:52:32Z", "generator": { "date": "2026-08-25T12:52:32Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2026-68189-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": "2026-08-25T12:52:32Z", "number": "2", "summary": "Official Publication" } ], "status": "final", "version": "2" }, "title": "Security update on CVE-2026-68189" }, "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": "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-2026-68189", "notes": [ { "category": "description", "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: Protect UUID list traversal\n\nThe hci_sync conversion moved class-of-device and EIR generation from an\nHCI request built under hdev->lock to asynchronous command sync work.\nThe worker holds hdev->req_lock, but that lock does not serialize access\nto hdev->uuids against add_uuid() and remove_uuid(), which update the\nlist under hdev->lock.\n\nThe following interleaving can therefore occur:\n\n CPU0 (command sync work) CPU1 (management socket)\n fetch uuid from the list\n list_del(&uuid->list)\n kfree(uuid)\n read uuid->size\n\nKASAN reports the resulting use-after-free:\n\n BUG: KASAN: slab-use-after-free in eir_create+0xb8f/0xee0\n Read of size 1 at addr ffff88810dbd8620 by task kworker/u17:0/87\n Workqueue: hci0 hci_cmd_sync_work\n Call Trace:\n eir_create+0xb8f/0xee0\n hci_update_eir_sync+0x1c0/0x330\n hci_cmd_sync_work+0x13c/0x290\n process_one_work+0x63a/0x1070\n worker_thread+0x45b/0xd10\n\n Allocated by task 86:\n __kasan_kmalloc+0x8f/0xa0\n add_uuid+0x18a/0x4b0\n hci_sock_sendmsg+0x1033/0x1ea0\n\n Freed by task 92:\n __kasan_slab_free+0x43/0x70\n kfree+0x131/0x3c0\n remove_uuid+0x25e/0x560\n hci_sock_sendmsg+0x1033/0x1ea0\n\nHold hdev->lock while generating and committing the class-of-device and\nEIR snapshots. Release it before sending an HCI command, so controller\nwaits do not happen under the device lock. This protects all UUID list\nwalks in these paths and restores the serialization lost in the command\nsync conversion.", "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-2026-68189" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/30bc6248f035a792d1b1f4cc761b32fd5827b55f", "url": "https://git.kernel.org/stable/c/30bc6248f035a792d1b1f4cc761b32fd5827b55f" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/a351f68fb24828b23a971e00b8238ee0e8a40380", "url": "https://git.kernel.org/stable/c/a351f68fb24828b23a971e00b8238ee0e8a40380" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/a42f5536ea9c00e13f0c0fbb330feed95e2365ca", "url": "https://git.kernel.org/stable/c/a42f5536ea9c00e13f0c0fbb330feed95e2365ca" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/e4fa2c5c261d736b8e58759fdef3a968d510630c", "url": "https://git.kernel.org/stable/c/e4fa2c5c261d736b8e58759fdef3a968d510630c" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/e9027ffbf5a0f3c12ca8900822e884eae9f0821b", "url": "https://git.kernel.org/stable/c/e9027ffbf5a0f3c12ca8900822e884eae9f0821b" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/fe13adc258df88d95789e5673c7ba5178b5f8b28", "url": "https://git.kernel.org/stable/c/fe13adc258df88d95789e5673c7ba5178b5f8b28" } ], "release_date": "2026-08-10T13:20:00Z", "threats": [ { "category": "impact", "details": "Moderate" }, { "category": "impact", "date": "2026-08-23T16:47:06.824433Z", "details": "This kernel is not affected. The vulnerable code was never introduced: the asynchronous hci_sync EIR/class-of-device generation path that carries the use-after-free does not exist in this kernel.", "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" ] } ] } ] }