{ "document": { "aggregate_severity": { "text": "Important" }, "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/ubuntu16.04els/vex/2025/cve-2025-21912-els_os-ubuntu16_04els.json" } ], "title": "Security update on CVE-2025-21912", "tracking": { "current_release_date": "2025-12-23T22:15:38Z", "generator": { "date": "2025-12-23T22:15:38Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2025-21912-ELS_OS-UBUNTU16.04ELS", "initial_release_date": "2025-04-01T16:15:00Z", "revision_history": [ { "date": "2025-04-01T16:15:00Z", "number": "1", "summary": "Initial version" }, { "date": "2025-05-19T15:19:48Z", "number": "2", "summary": "Official Publication" }, { "date": "2025-12-23T22:15:38Z", "number": "3", "summary": "Update document" } ], "status": "final", "version": "2" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Ubuntu 16.04", "product": { "name": "Ubuntu 16.04", "product_id": "Ubuntu-16", "product_identification_helper": { "cpe": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*" } } } ], "category": "product_family", "name": "Ubuntu" } ], "category": "vendor", "name": "Canonical Ltd." }, { "branches": [ { "branches": [ { "category": "product_version", "name": "linux-libc-dev-0:4.4.0-274.308.amd64", "product": { "name": "linux-libc-dev-0:4.4.0-274.308.amd64", "product_id": "linux-libc-dev-0:4.4.0-274.308.amd64", "product_identification_helper": { "purl": "pkg:deb/cloudlinux/linux-libc-dev@4.4.0-274.308?arch=amd64" } } }, { "category": "product_version", "name": "linux-cloud-tools-4.4.0-274-tuxcare.els45-generic-0:4.4.0-274.308.amd64", "product": { "name": "linux-cloud-tools-4.4.0-274-tuxcare.els45-generic-0:4.4.0-274.308.amd64", "product_id": "linux-cloud-tools-4.4.0-274-tuxcare.els45-generic-0:4.4.0-274.308.amd64", "product_identification_helper": { "purl": "pkg:deb/cloudlinux/linux-cloud-tools-4.4.0-274-tuxcare.els45-generic@4.4.0-274.308?arch=amd64" } } }, { "category": "product_version", "name": "linux-tools-generic-0:4.4.0.274.308.amd64", "product": { "name": "linux-tools-generic-0:4.4.0.274.308.amd64", "product_id": "linux-tools-generic-0:4.4.0.274.308.amd64", "product_identification_helper": { "purl": "pkg:deb/cloudlinux/linux-tools-generic@4.4.0.274.308?arch=amd64" } } }, { "category": "product_version", "name": "linux-image-lowlatency-0:4.4.0.274.308.amd64", "product": { "name": "linux-image-lowlatency-0:4.4.0.274.308.amd64", "product_id": "linux-image-lowlatency-0:4.4.0.274.308.amd64", "product_identification_helper": { "purl": "pkg:deb/cloudlinux/linux-image-lowlatency@4.4.0.274.308?arch=amd64" } } }, { "category": "product_version", "name": "linux-lowlatency-0:4.4.0.274.308.amd64", "product": { "name": "linux-lowlatency-0:4.4.0.274.308.amd64", "product_id": "linux-lowlatency-0:4.4.0.274.308.amd64", "product_identification_helper": { "purl": "pkg:deb/cloudlinux/linux-lowlatency@4.4.0.274.308?arch=amd64" } } }, { "category": "product_version", "name": "linux-headers-lowlatency-0:4.4.0.274.308.amd64", "product": { "name": "linux-headers-lowlatency-0:4.4.0.274.308.amd64", "product_id": "linux-headers-lowlatency-0:4.4.0.274.308.amd64", "product_identification_helper": { "purl": "pkg:deb/cloudlinux/linux-headers-lowlatency@4.4.0.274.308?arch=amd64" } } }, { "category": "product_version", "name": "linux-buildinfo-4.4.0-274-tuxcare.els45-lowlatency-0:4.4.0-274.308.amd64", "product": { "name": "linux-buildinfo-4.4.0-274-tuxcare.els45-lowlatency-0:4.4.0-274.308.amd64", "product_id": "linux-buildinfo-4.4.0-274-tuxcare.els45-lowlatency-0:4.4.0-274.308.amd64", "product_identification_helper": { "purl": "pkg:deb/cloudlinux/linux-buildinfo-4.4.0-274-tuxcare.els45-lowlatency@4.4.0-274.308?arch=amd64" } } }, { "category": "product_version", "name": "linux-tools-lowlatency-0:4.4.0.274.308.amd64", "product": { "name": "linux-tools-lowlatency-0:4.4.0.274.308.amd64", "product_id": "linux-tools-lowlatency-0:4.4.0.274.308.amd64", "product_identification_helper": { "purl": "pkg:deb/cloudlinux/linux-tools-lowlatency@4.4.0.274.308?arch=amd64" } } } ], "category": "architecture", "name": "amd64" }, { "branches": [ { "category": "product_version", "name": "linux-tools-host-0:4.4.0-274.308.all", "product": { "name": "linux-tools-host-0:4.4.0-274.308.all", "product_id": "linux-tools-host-0:4.4.0-274.308.all", "product_identification_helper": { "purl": "pkg:deb/cloudlinux/linux-tools-host@4.4.0-274.308?arch=all" } } }, { "category": "product_version", "name": "linux-source-4.4.0-0:4.4.0-274.308.all", "product": { "name": "linux-source-4.4.0-0:4.4.0-274.308.all", "product_id": "linux-source-4.4.0-0:4.4.0-274.308.all", "product_identification_helper": { "purl": "pkg:deb/cloudlinux/linux-source-4.4.0@4.4.0-274.308?arch=all" } } } ], "category": "architecture", "name": "all" } ], "category": "vendor", "name": "CloudLinux" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "linux-libc-dev-0:4.4.0-274.308.amd64 as a component of Ubuntu 16.04", "product_id": "Ubuntu-16:linux-libc-dev-0:4.4.0-274.308.amd64" }, "product_reference": "linux-libc-dev-0:4.4.0-274.308.amd64", "relates_to_product_reference": "Ubuntu-16" }, { "category": "default_component_of", "full_product_name": { "name": "linux-cloud-tools-4.4.0-274-tuxcare.els45-generic-0:4.4.0-274.308.amd64 as a component of Ubuntu 16.04", "product_id": "Ubuntu-16:linux-cloud-tools-4.4.0-274-tuxcare.els45-generic-0:4.4.0-274.308.amd64" }, "product_reference": "linux-cloud-tools-4.4.0-274-tuxcare.els45-generic-0:4.4.0-274.308.amd64", "relates_to_product_reference": "Ubuntu-16" }, { "category": "default_component_of", "full_product_name": { "name": "linux-tools-host-0:4.4.0-274.308.all as a component of Ubuntu 16.04", "product_id": "Ubuntu-16:linux-tools-host-0:4.4.0-274.308.all" }, "product_reference": "linux-tools-host-0:4.4.0-274.308.all", "relates_to_product_reference": "Ubuntu-16" }, { "category": "default_component_of", "full_product_name": { "name": "linux-tools-generic-0:4.4.0.274.308.amd64 as a component of Ubuntu 16.04", "product_id": "Ubuntu-16:linux-tools-generic-0:4.4.0.274.308.amd64" }, "product_reference": "linux-tools-generic-0:4.4.0.274.308.amd64", "relates_to_product_reference": "Ubuntu-16" }, { "category": "default_component_of", "full_product_name": { "name": "linux-source-4.4.0-0:4.4.0-274.308.all as a component of Ubuntu 16.04", "product_id": "Ubuntu-16:linux-source-4.4.0-0:4.4.0-274.308.all" }, "product_reference": "linux-source-4.4.0-0:4.4.0-274.308.all", "relates_to_product_reference": "Ubuntu-16" }, { "category": "default_component_of", "full_product_name": { "name": "linux-image-lowlatency-0:4.4.0.274.308.amd64 as a component of Ubuntu 16.04", "product_id": "Ubuntu-16:linux-image-lowlatency-0:4.4.0.274.308.amd64" }, "product_reference": "linux-image-lowlatency-0:4.4.0.274.308.amd64", "relates_to_product_reference": "Ubuntu-16" }, { "category": "default_component_of", "full_product_name": { "name": "linux-lowlatency-0:4.4.0.274.308.amd64 as a component of Ubuntu 16.04", "product_id": "Ubuntu-16:linux-lowlatency-0:4.4.0.274.308.amd64" }, "product_reference": "linux-lowlatency-0:4.4.0.274.308.amd64", "relates_to_product_reference": "Ubuntu-16" }, { "category": "default_component_of", "full_product_name": { "name": "linux-headers-lowlatency-0:4.4.0.274.308.amd64 as a component of Ubuntu 16.04", "product_id": "Ubuntu-16:linux-headers-lowlatency-0:4.4.0.274.308.amd64" }, "product_reference": "linux-headers-lowlatency-0:4.4.0.274.308.amd64", "relates_to_product_reference": "Ubuntu-16" }, { "category": "default_component_of", "full_product_name": { "name": "linux-buildinfo-4.4.0-274-tuxcare.els45-lowlatency-0:4.4.0-274.308.amd64 as a component of Ubuntu 16.04", "product_id": "Ubuntu-16:linux-buildinfo-4.4.0-274-tuxcare.els45-lowlatency-0:4.4.0-274.308.amd64" }, "product_reference": "linux-buildinfo-4.4.0-274-tuxcare.els45-lowlatency-0:4.4.0-274.308.amd64", "relates_to_product_reference": "Ubuntu-16" }, { "category": "default_component_of", "full_product_name": { "name": "linux-tools-lowlatency-0:4.4.0.274.308.amd64 as a component of Ubuntu 16.04", "product_id": "Ubuntu-16:linux-tools-lowlatency-0:4.4.0.274.308.amd64" }, "product_reference": "linux-tools-lowlatency-0:4.4.0.274.308.amd64", "relates_to_product_reference": "Ubuntu-16" } ] }, "vulnerabilities": [ { "cve": "CVE-2025-21912", "cwe": { "id": "CWE-667", "name": "Improper Locking" }, "notes": [ { "category": "description", "text": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: rcar: Use raw_spinlock to protect register access\n\nUse raw_spinlock in order to fix spurious messages about invalid context\nwhen spinlock debugging is enabled. The lock is only used to serialize\nregister access.\n\n [ 4.239592] =============================\n [ 4.239595] [ BUG: Invalid wait context ]\n [ 4.239599] 6.13.0-rc7-arm64-renesas-05496-gd088502a519f #35 Not tainted\n [ 4.239603] -----------------------------\n [ 4.239606] kworker/u8:5/76 is trying to lock:\n [ 4.239609] ffff0000091898a0 (&p->lock){....}-{3:3}, at: gpio_rcar_config_interrupt_input_mode+0x34/0x164\n [ 4.239641] other info that might help us debug this:\n [ 4.239643] context-{5:5}\n [ 4.239646] 5 locks held by kworker/u8:5/76:\n [ 4.239651] #0: ffff0000080fb148 ((wq_completion)async){+.+.}-{0:0}, at: process_one_work+0x190/0x62c\n [ 4.250180] OF: /soc/sound@ec500000/ports/port@0/endpoint: Read of boolean property 'frame-master' with a value.\n [ 4.254094] #1: ffff80008299bd80 ((work_completion)(&entry->work)){+.+.}-{0:0}, at: process_one_work+0x1b8/0x62c\n [ 4.254109] #2: ffff00000920c8f8\n [ 4.258345] OF: /soc/sound@ec500000/ports/port@1/endpoint: Read of boolean property 'bitclock-master' with a value.\n [ 4.264803] (&dev->mutex){....}-{4:4}, at: __device_attach_async_helper+0x3c/0xdc\n [ 4.264820] #3: ffff00000a50ca40 (request_class#2){+.+.}-{4:4}, at: __setup_irq+0xa0/0x690\n [ 4.264840] #4:\n [ 4.268872] OF: /soc/sound@ec500000/ports/port@1/endpoint: Read of boolean property 'frame-master' with a value.\n [ 4.273275] ffff00000a50c8c8 (lock_class){....}-{2:2}, at: __setup_irq+0xc4/0x690\n [ 4.296130] renesas_sdhi_internal_dmac ee100000.mmc: mmc1 base at 0x00000000ee100000, max clock rate 200 MHz\n [ 4.304082] stack backtrace:\n [ 4.304086] CPU: 1 UID: 0 PID: 76 Comm: kworker/u8:5 Not tainted 6.13.0-rc7-arm64-renesas-05496-gd088502a519f #35\n [ 4.304092] Hardware name: Renesas Salvator-X 2nd version board based on r8a77965 (DT)\n [ 4.304097] Workqueue: async async_run_entry_fn\n [ 4.304106] Call trace:\n [ 4.304110] show_stack+0x14/0x20 (C)\n [ 4.304122] dump_stack_lvl+0x6c/0x90\n [ 4.304131] dump_stack+0x14/0x1c\n [ 4.304138] __lock_acquire+0xdfc/0x1584\n [ 4.426274] lock_acquire+0x1c4/0x33c\n [ 4.429942] _raw_spin_lock_irqsave+0x5c/0x80\n [ 4.434307] gpio_rcar_config_interrupt_input_mode+0x34/0x164\n [ 4.440061] gpio_rcar_irq_set_type+0xd4/0xd8\n [ 4.444422] __irq_set_trigger+0x5c/0x178\n [ 4.448435] __setup_irq+0x2e4/0x690\n [ 4.452012] request_threaded_irq+0xc4/0x190\n [ 4.456285] devm_request_threaded_irq+0x7c/0xf4\n [ 4.459398] ata1: link resume succeeded after 1 retries\n [ 4.460902] mmc_gpiod_request_cd_irq+0x68/0xe0\n [ 4.470660] mmc_start_host+0x50/0xac\n [ 4.474327] mmc_add_host+0x80/0xe4\n [ 4.477817] tmio_mmc_host_probe+0x2b0/0x440\n [ 4.482094] renesas_sdhi_probe+0x488/0x6f4\n [ 4.486281] renesas_sdhi_internal_dmac_probe+0x60/0x78\n [ 4.491509] platform_probe+0x64/0xd8\n [ 4.495178] really_probe+0xb8/0x2a8\n [ 4.498756] __driver_probe_device+0x74/0x118\n [ 4.503116] driver_probe_device+0x3c/0x154\n [ 4.507303] __device_attach_driver+0xd4/0x160\n [ 4.511750] bus_for_each_drv+0x84/0xe0\n [ 4.515588] __device_attach_async_helper+0xb0/0xdc\n [ 4.520470] async_run_entry_fn+0x30/0xd8\n [ 4.524481] process_one_work+0x210/0x62c\n [ 4.528494] worker_thread+0x1ac/0x340\n [ 4.532245] kthread+0x10c/0x110\n [ 4.535476] ret_from_fork+0x10/0x20", "title": "Vulnerability description" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "fixed": [ "Ubuntu-16:linux-libc-dev-0:4.4.0-274.308.amd64", "Ubuntu-16:linux-cloud-tools-4.4.0-274-tuxcare.els45-generic-0:4.4.0-274.308.amd64", "Ubuntu-16:linux-tools-host-0:4.4.0-274.308.all", "Ubuntu-16:linux-tools-generic-0:4.4.0.274.308.amd64", "Ubuntu-16:linux-source-4.4.0-0:4.4.0-274.308.all", "Ubuntu-16:linux-image-lowlatency-0:4.4.0.274.308.amd64", "Ubuntu-16:linux-lowlatency-0:4.4.0.274.308.amd64", "Ubuntu-16:linux-headers-lowlatency-0:4.4.0.274.308.amd64", "Ubuntu-16:linux-buildinfo-4.4.0-274-tuxcare.els45-lowlatency-0:4.4.0-274.308.amd64", "Ubuntu-16:linux-tools-lowlatency-0:4.4.0.274.308.amd64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2025-21912" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/3e300913c42041e81c5b17a970c4e078086ff2d1", "url": "https://git.kernel.org/stable/c/3e300913c42041e81c5b17a970c4e078086ff2d1" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/51ef3073493e2a25dced05fdd59dfb059e7e284d", "url": "https://git.kernel.org/stable/c/51ef3073493e2a25dced05fdd59dfb059e7e284d" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/7c1f36f9c9aca507d317479a3d3388150ae40a87", "url": "https://git.kernel.org/stable/c/7c1f36f9c9aca507d317479a3d3388150ae40a87" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/b42c84f9e4ec5bc2885e7fd80c79ec0352f5d2af", "url": "https://git.kernel.org/stable/c/b42c84f9e4ec5bc2885e7fd80c79ec0352f5d2af" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/c10365031f16514a29c812cd909085a6e4ea4b61", "url": "https://git.kernel.org/stable/c/c10365031f16514a29c812cd909085a6e4ea4b61" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/f02c41f87cfe61440c18bf77d1ef0a884b9ee2b5", "url": "https://git.kernel.org/stable/c/f02c41f87cfe61440c18bf77d1ef0a884b9ee2b5" } ], "release_date": "2025-04-01T16:15:00", "scores": [ { "cvss_v3": { "attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1" }, "products": [ "Ubuntu-16:linux-libc-dev-0:4.4.0-274.308.amd64", "Ubuntu-16:linux-cloud-tools-4.4.0-274-tuxcare.els45-generic-0:4.4.0-274.308.amd64", "Ubuntu-16:linux-tools-host-0:4.4.0-274.308.all", "Ubuntu-16:linux-tools-generic-0:4.4.0.274.308.amd64", "Ubuntu-16:linux-source-4.4.0-0:4.4.0-274.308.all", "Ubuntu-16:linux-image-lowlatency-0:4.4.0.274.308.amd64", "Ubuntu-16:linux-lowlatency-0:4.4.0.274.308.amd64", "Ubuntu-16:linux-headers-lowlatency-0:4.4.0.274.308.amd64", "Ubuntu-16:linux-buildinfo-4.4.0-274-tuxcare.els45-lowlatency-0:4.4.0-274.308.amd64", "Ubuntu-16:linux-tools-lowlatency-0:4.4.0.274.308.amd64" ] } ], "threats": [ { "category": "impact", "details": "Medium" } ] } ] }