{ "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/2022/cve-2022-49740-els_os-ubuntu16_04els.json" } ], "title": "Security update on CVE-2022-49740", "tracking": { "current_release_date": "2025-12-23T22:15:38Z", "generator": { "date": "2025-12-23T22:15:38Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2022-49740-ELS_OS-UBUNTU16.04ELS", "initial_release_date": "2022-01-01T00:00:00Z", "revision_history": [ { "date": "2022-01-01T00:00:00Z", "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-2022-49740", "cwe": { "id": "CWE-125", "name": "Out-of-bounds Read" }, "notes": [ { "category": "description", "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: brcmfmac: Check the count value of channel spec to prevent out-of-bounds reads\n\nThis patch fixes slab-out-of-bounds reads in brcmfmac that occur in\nbrcmf_construct_chaninfo() and brcmf_enable_bw40_2g() when the count\nvalue of channel specifications provided by the device is greater than\nthe length of 'list->element[]', decided by the size of the 'list'\nallocated with kzalloc(). The patch adds checks that make the functions\nfree the buffer and return -EINVAL if that is the case. Note that the\nnegative return is handled by the caller, brcmf_setup_wiphybands() or\nbrcmf_cfg80211_attach().\n\nFound by a modified version of syzkaller.\n\nCrash Report from brcmf_construct_chaninfo():\n==================================================================\nBUG: KASAN: slab-out-of-bounds in brcmf_setup_wiphybands+0x1238/0x1430\nRead of size 4 at addr ffff888115f24600 by task kworker/0:2/1896\n\nCPU: 0 PID: 1896 Comm: kworker/0:2 Tainted: G W O 5.14.0+ #132\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014\nWorkqueue: usb_hub_wq hub_event\nCall Trace:\n dump_stack_lvl+0x57/0x7d\n print_address_description.constprop.0.cold+0x93/0x334\n kasan_report.cold+0x83/0xdf\n brcmf_setup_wiphybands+0x1238/0x1430\n brcmf_cfg80211_attach+0x2118/0x3fd0\n brcmf_attach+0x389/0xd40\n brcmf_usb_probe+0x12de/0x1690\n usb_probe_interface+0x25f/0x710\n really_probe+0x1be/0xa90\n __driver_probe_device+0x2ab/0x460\n driver_probe_device+0x49/0x120\n __device_attach_driver+0x18a/0x250\n bus_for_each_drv+0x123/0x1a0\n __device_attach+0x207/0x330\n bus_probe_device+0x1a2/0x260\n device_add+0xa61/0x1ce0\n usb_set_configuration+0x984/0x1770\n usb_generic_driver_probe+0x69/0x90\n usb_probe_device+0x9c/0x220\n really_probe+0x1be/0xa90\n __driver_probe_device+0x2ab/0x460\n driver_probe_device+0x49/0x120\n __device_attach_driver+0x18a/0x250\n bus_for_each_drv+0x123/0x1a0\n __device_attach+0x207/0x330\n bus_probe_device+0x1a2/0x260\n device_add+0xa61/0x1ce0\n usb_new_device.cold+0x463/0xf66\n hub_event+0x10d5/0x3330\n process_one_work+0x873/0x13e0\n worker_thread+0x8b/0xd10\n kthread+0x379/0x450\n ret_from_fork+0x1f/0x30\n\nAllocated by task 1896:\n kasan_save_stack+0x1b/0x40\n __kasan_kmalloc+0x7c/0x90\n kmem_cache_alloc_trace+0x19e/0x330\n brcmf_setup_wiphybands+0x290/0x1430\n brcmf_cfg80211_attach+0x2118/0x3fd0\n brcmf_attach+0x389/0xd40\n brcmf_usb_probe+0x12de/0x1690\n usb_probe_interface+0x25f/0x710\n really_probe+0x1be/0xa90\n __driver_probe_device+0x2ab/0x460\n driver_probe_device+0x49/0x120\n __device_attach_driver+0x18a/0x250\n bus_for_each_drv+0x123/0x1a0\n __device_attach+0x207/0x330\n bus_probe_device+0x1a2/0x260\n device_add+0xa61/0x1ce0\n usb_set_configuration+0x984/0x1770\n usb_generic_driver_probe+0x69/0x90\n usb_probe_device+0x9c/0x220\n really_probe+0x1be/0xa90\n __driver_probe_device+0x2ab/0x460\n driver_probe_device+0x49/0x120\n __device_attach_driver+0x18a/0x250\n bus_for_each_drv+0x123/0x1a0\n __device_attach+0x207/0x330\n bus_probe_device+0x1a2/0x260\n device_add+0xa61/0x1ce0\n usb_new_device.cold+0x463/0xf66\n hub_event+0x10d5/0x3330\n process_one_work+0x873/0x13e0\n worker_thread+0x8b/0xd10\n kthread+0x379/0x450\n ret_from_fork+0x1f/0x30\n\nThe buggy address belongs to the object at ffff888115f24000\n which belongs to the cache kmalloc-2k of size 2048\nThe buggy address is located 1536 bytes inside of\n 2048-byte region [ffff888115f24000, ffff888115f24800)\n\nMemory state around the buggy address:\n ffff888115f24500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n ffff888115f24580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n>ffff888115f24600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n ^\n ffff888115f24680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n ffff888115f24700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n==================================================================\n\nCrash Report from brcmf_enable_bw40_2g():\n==========\n---truncated---", "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-2022-49740" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/4920ab131b2dbae7464b72bdcac465d070254209", "url": "https://git.kernel.org/stable/c/4920ab131b2dbae7464b72bdcac465d070254209" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/9cf5e99c1ae1a85286a76c9a970202750538394c", "url": "https://git.kernel.org/stable/c/9cf5e99c1ae1a85286a76c9a970202750538394c" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/b2e412879595821ff1b5545cbed5f108fba7f5b6", "url": "https://git.kernel.org/stable/c/b2e412879595821ff1b5545cbed5f108fba7f5b6" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/e4991910f15013db72f6ec0db7038ea67a57052e", "url": "https://git.kernel.org/stable/c/e4991910f15013db72f6ec0db7038ea67a57052e" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/f06de1bb6d61f0c18b0213bbc6298960037f9d42", "url": "https://git.kernel.org/stable/c/f06de1bb6d61f0c18b0213bbc6298960037f9d42" } ], "release_date": "2025-03-27T17:15:00", "scores": [ { "cvss_v3": { "attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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": "High" } ] } ] }