{ "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/2024/cve-2024-56661-els_os-ubuntu16_04els.json" } ], "title": "Security update on CVE-2024-56661", "tracking": { "current_release_date": "2025-12-23T22:15:38Z", "generator": { "date": "2025-12-23T22:15:38Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2024-56661-ELS_OS-UBUNTU16.04ELS", "initial_release_date": "2024-12-27T15:15:00Z", "revision_history": [ { "date": "2024-12-27T15:15:00Z", "number": "1", "summary": "Initial version" }, { "date": "2025-06-10T09:38:30Z", "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-tools-4.4.0-275-tuxcare.els46-0:4.4.0-275.309.amd64", "product": { "name": "linux-tools-4.4.0-275-tuxcare.els46-0:4.4.0-275.309.amd64", "product_id": "linux-tools-4.4.0-275-tuxcare.els46-0:4.4.0-275.309.amd64", "product_identification_helper": { "purl": "pkg:deb/cloudlinux/linux-tools-4.4.0-275-tuxcare.els46@4.4.0-275.309?arch=amd64" } } }, { "category": "product_version", "name": 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"linux-modules-4.4.0-275-tuxcare.els46-generic-0:4.4.0-275.309.amd64 as a component of Ubuntu 16.04", "product_id": "Ubuntu-16:linux-modules-4.4.0-275-tuxcare.els46-generic-0:4.4.0-275.309.amd64" }, "product_reference": "linux-modules-4.4.0-275-tuxcare.els46-generic-0:4.4.0-275.309.amd64", "relates_to_product_reference": "Ubuntu-16" }, { "category": "default_component_of", "full_product_name": { "name": "linux-modules-extra-4.4.0-275-tuxcare.els46-generic-0:4.4.0-275.309.amd64 as a component of Ubuntu 16.04", "product_id": "Ubuntu-16:linux-modules-extra-4.4.0-275-tuxcare.els46-generic-0:4.4.0-275.309.amd64" }, "product_reference": "linux-modules-extra-4.4.0-275-tuxcare.els46-generic-0:4.4.0-275.309.amd64", "relates_to_product_reference": "Ubuntu-16" }, { "category": "default_component_of", "full_product_name": { "name": "linux-tools-host-0:4.4.0-275.309.all as a component of Ubuntu 16.04", "product_id": "Ubuntu-16:linux-tools-host-0:4.4.0-275.309.all" }, "product_reference": "linux-tools-host-0:4.4.0-275.309.all", "relates_to_product_reference": "Ubuntu-16" }, { "category": "default_component_of", "full_product_name": { "name": "linux-source-4.4.0-0:4.4.0-275.309.all as a component of Ubuntu 16.04", "product_id": "Ubuntu-16:linux-source-4.4.0-0:4.4.0-275.309.all" }, "product_reference": "linux-source-4.4.0-0:4.4.0-275.309.all", "relates_to_product_reference": "Ubuntu-16" }, { "category": "default_component_of", "full_product_name": { "name": "linux-headers-4.4.0-275-tuxcare.els46-0:4.4.0-275.309.all as a component of Ubuntu 16.04", "product_id": "Ubuntu-16:linux-headers-4.4.0-275-tuxcare.els46-0:4.4.0-275.309.all" }, "product_reference": "linux-headers-4.4.0-275-tuxcare.els46-0:4.4.0-275.309.all", "relates_to_product_reference": "Ubuntu-16" }, { "category": "default_component_of", "full_product_name": { "name": "linux-headers-4.4.0-275-tuxcare.els46-lowlatency-0:4.4.0-275.309.amd64 as a component of Ubuntu 16.04", "product_id": "Ubuntu-16:linux-headers-4.4.0-275-tuxcare.els46-lowlatency-0:4.4.0-275.309.amd64" }, "product_reference": "linux-headers-4.4.0-275-tuxcare.els46-lowlatency-0:4.4.0-275.309.amd64", "relates_to_product_reference": "Ubuntu-16" }, { "category": "default_component_of", "full_product_name": { "name": "linux-image-unsigned-4.4.0-275-tuxcare.els46-lowlatency-0:4.4.0-275.309.amd64 as a component of Ubuntu 16.04", "product_id": "Ubuntu-16:linux-image-unsigned-4.4.0-275-tuxcare.els46-lowlatency-0:4.4.0-275.309.amd64" }, "product_reference": "linux-image-unsigned-4.4.0-275-tuxcare.els46-lowlatency-0:4.4.0-275.309.amd64", "relates_to_product_reference": "Ubuntu-16" } ] }, "vulnerabilities": [ { "cve": "CVE-2024-56661", "cwe": { "id": "CWE-476", "name": "NULL Pointer Dereference" }, "notes": [ { "category": "description", "text": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: fix NULL deref in cleanup_bearer()\n\nsyzbot found [1] that after blamed commit, ub->ubsock->sk\nwas NULL when attempting the atomic_dec() :\n\natomic_dec(&tipc_net(sock_net(ub->ubsock->sk))->wq_count);\n\nFix this by caching the tipc_net pointer.\n\n[1]\n\nOops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN PTI\nKASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]\nCPU: 0 UID: 0 PID: 5896 Comm: kworker/0:3 Not tainted 6.13.0-rc1-next-20241203-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024\nWorkqueue: events cleanup_bearer\n RIP: 0010:read_pnet include/net/net_namespace.h:387 [inline]\n RIP: 0010:sock_net include/net/sock.h:655 [inline]\n RIP: 0010:cleanup_bearer+0x1f7/0x280 net/tipc/udp_media.c:820\nCode: 18 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 3c f7 99 f6 48 8b 1b 48 83 c3 30 e8 f0 e4 60 00 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 1a f7 99 f6 49 83 c7 e8 48 8b 1b\nRSP: 0018:ffffc9000410fb70 EFLAGS: 00010206\nRAX: 0000000000000006 RBX: 0000000000000030 RCX: ffff88802fe45a00\nRDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc9000410f900\nRBP: ffff88807e1f0908 R08: ffffc9000410f907 R09: 1ffff92000821f20\nR10: dffffc0000000000 R11: fffff52000821f21 R12: ffff888031d19980\nR13: dffffc0000000000 R14: dffffc0000000000 R15: ffff88807e1f0918\nFS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000556ca050b000 CR3: 0000000031c0c000 CR4: 00000000003526f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400", "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-tools-4.4.0-275-tuxcare.els46-0:4.4.0-275.309.amd64", "Ubuntu-16:linux-libc-dev-0:4.4.0-275.309.amd64", "Ubuntu-16:linux-tools-4.4.0-275-tuxcare.els46-lowlatency-0:4.4.0-275.309.amd64", "Ubuntu-16:linux-modules-4.4.0-275-tuxcare.els46-generic-0:4.4.0-275.309.amd64", "Ubuntu-16:linux-modules-extra-4.4.0-275-tuxcare.els46-generic-0:4.4.0-275.309.amd64", "Ubuntu-16:linux-tools-host-0:4.4.0-275.309.all", "Ubuntu-16:linux-source-4.4.0-0:4.4.0-275.309.all", "Ubuntu-16:linux-headers-4.4.0-275-tuxcare.els46-0:4.4.0-275.309.all", "Ubuntu-16:linux-headers-4.4.0-275-tuxcare.els46-lowlatency-0:4.4.0-275.309.amd64", "Ubuntu-16:linux-image-unsigned-4.4.0-275-tuxcare.els46-lowlatency-0:4.4.0-275.309.amd64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2024-56661" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/07b569eda6fe6a1e83be5a587abee12d1303f95e", "url": "https://git.kernel.org/stable/c/07b569eda6fe6a1e83be5a587abee12d1303f95e" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/754ec823ee53422361da7958a8c8bf3275426912", "url": "https://git.kernel.org/stable/c/754ec823ee53422361da7958a8c8bf3275426912" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/89ecda492d0a37fd00aaffc4151f1f44c26d93ac", "url": "https://git.kernel.org/stable/c/89ecda492d0a37fd00aaffc4151f1f44c26d93ac" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/a771f349c95d3397636861a0a6462d4a7a7ecb25", "url": "https://git.kernel.org/stable/c/a771f349c95d3397636861a0a6462d4a7a7ecb25" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/a852c82eda4991e21610837aaa160965be71f5cc", "url": "https://git.kernel.org/stable/c/a852c82eda4991e21610837aaa160965be71f5cc" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/b04d86fff66b15c07505d226431f808c15b1703c", "url": "https://git.kernel.org/stable/c/b04d86fff66b15c07505d226431f808c15b1703c" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/d1d4dfb189a115734bff81c411bc58d9e348db7d", "url": "https://git.kernel.org/stable/c/d1d4dfb189a115734bff81c411bc58d9e348db7d" } ], "release_date": "2024-12-27T15:15:00", "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-tools-4.4.0-275-tuxcare.els46-0:4.4.0-275.309.amd64", "Ubuntu-16:linux-libc-dev-0:4.4.0-275.309.amd64", "Ubuntu-16:linux-tools-4.4.0-275-tuxcare.els46-lowlatency-0:4.4.0-275.309.amd64", "Ubuntu-16:linux-modules-4.4.0-275-tuxcare.els46-generic-0:4.4.0-275.309.amd64", "Ubuntu-16:linux-modules-extra-4.4.0-275-tuxcare.els46-generic-0:4.4.0-275.309.amd64", "Ubuntu-16:linux-tools-host-0:4.4.0-275.309.all", "Ubuntu-16:linux-source-4.4.0-0:4.4.0-275.309.all", "Ubuntu-16:linux-headers-4.4.0-275-tuxcare.els46-0:4.4.0-275.309.all", "Ubuntu-16:linux-headers-4.4.0-275-tuxcare.els46-lowlatency-0:4.4.0-275.309.amd64", "Ubuntu-16:linux-image-unsigned-4.4.0-275-tuxcare.els46-lowlatency-0:4.4.0-275.309.amd64" ] } ], "threats": [ { "category": "impact", "details": "Medium" } ] } ] }