{ "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-2022-49738-els_os-ubuntu16_04els.json" } ], "title": "Security update on CVE-2022-49738", "tracking": { "current_release_date": "2025-12-23T22:15:38Z", "generator": { "date": "2025-12-23T22:15:38Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2022-49738-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-2022-49738", "cwe": { "id": "CWE-125", "name": "Out-of-bounds Read" }, "notes": [ { "category": "description", "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to do sanity check on i_extra_isize in is_alive()\n\nsyzbot found a f2fs bug:\n\nBUG: KASAN: slab-out-of-bounds in data_blkaddr fs/f2fs/f2fs.h:2891 [inline]\nBUG: KASAN: slab-out-of-bounds in is_alive fs/f2fs/gc.c:1117 [inline]\nBUG: KASAN: slab-out-of-bounds in gc_data_segment fs/f2fs/gc.c:1520 [inline]\nBUG: KASAN: slab-out-of-bounds in do_garbage_collect+0x386a/0x3df0 fs/f2fs/gc.c:1734\nRead of size 4 at addr ffff888076557568 by task kworker/u4:3/52\n\nCPU: 1 PID: 52 Comm: kworker/u4:3 Not tainted 6.1.0-rc4-syzkaller-00362-gfef7fd48922d #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022\nWorkqueue: writeback wb_workfn (flush-7:0)\nCall Trace:\n\n__dump_stack lib/dump_stack.c:88 [inline]\ndump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106\nprint_address_description mm/kasan/report.c:284 [inline]\nprint_report+0x15e/0x45d mm/kasan/report.c:395\nkasan_report+0xbb/0x1f0 mm/kasan/report.c:495\ndata_blkaddr fs/f2fs/f2fs.h:2891 [inline]\nis_alive fs/f2fs/gc.c:1117 [inline]\ngc_data_segment fs/f2fs/gc.c:1520 [inline]\ndo_garbage_collect+0x386a/0x3df0 fs/f2fs/gc.c:1734\nf2fs_gc+0x88c/0x20a0 fs/f2fs/gc.c:1831\nf2fs_balance_fs+0x544/0x6b0 fs/f2fs/segment.c:410\nf2fs_write_inode+0x57e/0xe20 fs/f2fs/inode.c:753\nwrite_inode fs/fs-writeback.c:1440 [inline]\n__writeback_single_inode+0xcfc/0x1440 fs/fs-writeback.c:1652\nwriteback_sb_inodes+0x54d/0xf90 fs/fs-writeback.c:1870\nwb_writeback+0x2c5/0xd70 fs/fs-writeback.c:2044\nwb_do_writeback fs/fs-writeback.c:2187 [inline]\nwb_workfn+0x2dc/0x12f0 fs/fs-writeback.c:2227\nprocess_one_work+0x9bf/0x1710 kernel/workqueue.c:2289\nworker_thread+0x665/0x1080 kernel/workqueue.c:2436\nkthread+0x2e4/0x3a0 kernel/kthread.c:376\nret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306\n\nThe root cause is that we forgot to do sanity check on .i_extra_isize\nin below path, result in accessing invalid address later, fix it.\n- gc_data_segment\n - is_alive\n - data_blkaddr\n - offset_in_addr", "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-2022-49738" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/5b25035fb888cb2f78bf0b9c9f95b1dc54480d36", "url": "https://git.kernel.org/stable/c/5b25035fb888cb2f78bf0b9c9f95b1dc54480d36" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/914e38f02a490dafd980ff0f39cccedc074deb29", "url": "https://git.kernel.org/stable/c/914e38f02a490dafd980ff0f39cccedc074deb29" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/97ccfffcc061e54ce87e4a51a40e2e9cb0b7076a", "url": "https://git.kernel.org/stable/c/97ccfffcc061e54ce87e4a51a40e2e9cb0b7076a" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/d3b7b4afd6b2c344eabf9cc26b8bfa903c164c7c", "url": "https://git.kernel.org/stable/c/d3b7b4afd6b2c344eabf9cc26b8bfa903c164c7c" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/e5142a4935c1f15841d06047b8130078fc4d7b8f", "url": "https://git.kernel.org/stable/c/e5142a4935c1f15841d06047b8130078fc4d7b8f" } ], "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" } ] } ] }