{ "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-2026-68090-els_os-debian10els.json" } ], "tracking": { "current_release_date": "2026-08-25T12:53:30Z", "generator": { "date": "2026-08-25T12:53:30Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2026-68090-ELS_OS-DEBIAN10ELS", "initial_release_date": "2026-08-10T12:17:00Z", "revision_history": [ { "date": "2026-08-10T12:17:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-08-25T12:53:30Z", "number": "2", "summary": "Official Publication" } ], "status": "final", "version": "2" }, "title": "Security update on 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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-2026-68090", "notes": [ { "category": "description", "text": "In the Linux kernel, the following vulnerability has been resolved:\n\ndebugobjects: Plug race against a concurrent OOM disable\n\nsyzbot reported a puzzling splat:\n\n WARNING: kernel/time/hrtimer.c:443 at stub_timer+0xa/0x20\n\nstub_timer() is installed as timer callback function in\nhrtimer_fixup_assert_init(), which is invoked when\ndebug_object_assert_init() can't find a shadow object. In that case debug\nobjects emits a warning about it before invoking the fixup.\n\nThough the provided console log lacks this warning and instead has the\nfollowing a few seconds before the splat:\n\n ODEBUG: Out of memory. ODEBUG disabled\n\nSo the object was looked up in debug_object_assert_init() and the lookup\nfailed due a concurrent out of memory situation which disabled debug\nobjects and freed the shadow objects:\n\ndebug_object_assert_init()\n if (!debug_objects_enabled)\n \treturn; obj = alloc();\n \t\t\t\tif (!obj) {\n\t\t\t\t\t\t\t// Out of memory\n \tdebug_objects_enabled = false;\n free_objects();\n obj = lookup_or_alloc();\n\n // The lookup failed because the other side\n // removed the objects, so this returns\n // an error code as the object in question\n // is not statically initialized\n\n\tif (!IS_ERR_OR_NULL(obj))\n \treturn;\n if (!obj) {\n \tdebug_oom();\n return;\n }\n\n print(...)\n if (!debug_objects_enabled)\n return;\n\n fixup(...)\n\nThe debug object splat is skipped because debug_objects_enabled is false,\nbut the fixup callback is invoked unconditionally, which makes the timer\ndisfunctional.\n\nThis is only a problem in debug_object_assert_init() and\ndebug_object_activate() as both have to handle statically initialized\nobjects and therefore must handle the error pointer return case\ngracefully. All other places only handle the found/not found case and the\nNULL pointer return is a signal for OOM. Otherwise they get a valid shadow\nobject.\n\nPlug the hole by checking whether debug objects are still enabled before\ninvoking the print and fixup function in those two places.", "title": "Vulnerability description" } ], "product_status": { "under_investigation": [ "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-2026-68090" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/1f4f02b336c3be125c8fcf87df73db2e0e028b8b", "url": "https://git.kernel.org/stable/c/1f4f02b336c3be125c8fcf87df73db2e0e028b8b" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/203a965bf2ab43130778d8214fb0c3c8c2d19cdf", "url": "https://git.kernel.org/stable/c/203a965bf2ab43130778d8214fb0c3c8c2d19cdf" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/23da32e88627e63e0864f59f4c63a2dc0ab851a3", "url": "https://git.kernel.org/stable/c/23da32e88627e63e0864f59f4c63a2dc0ab851a3" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/2d5e320b7ab9b25229ac4331541964a58b5e1d29", "url": "https://git.kernel.org/stable/c/2d5e320b7ab9b25229ac4331541964a58b5e1d29" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/b81dde13cc163450dcb402dcc915ef13ba241e01", "url": "https://git.kernel.org/stable/c/b81dde13cc163450dcb402dcc915ef13ba241e01" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/c00164c9e7fa6145886ad666806cb5347895de5c", "url": "https://git.kernel.org/stable/c/c00164c9e7fa6145886ad666806cb5347895de5c" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/d663fbf28b2eebe665bb9cf828d7d528e5a8707e", "url": "https://git.kernel.org/stable/c/d663fbf28b2eebe665bb9cf828d7d528e5a8707e" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/e2e255d07723c330dded8e576ce28a8d23a692ce", "url": "https://git.kernel.org/stable/c/e2e255d07723c330dded8e576ce28a8d23a692ce" } ], "release_date": "2026-08-10T12:17:00Z", "remediations": [ { "category": "none_available", "date": "2026-08-18T12:19:06.430909Z", "details": "Affected", "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" ] } ] } ] }