{ "document": { "aggregate_severity": { "text": "Critical" }, "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/amazonlinux2els/vex/2026/cve-2026-99246-els_os-amazonlinux2els.json" } ], "tracking": { "current_release_date": "2026-11-12T06:55:18Z", "generator": { "date": "2026-11-12T06:55:18Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2026-99246-ELS_OS-AMAZONLINUX2ELS", "initial_release_date": "2026-11-03T12:17:00Z", "revision_history": [ { "date": "2026-11-03T12:17:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-11-12T06:55:18Z", "number": "2", "summary": "Official Publication" } ], "status": "final", "version": "2" }, "title": "Security 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"vulnerabilities": [ { "cve": "CVE-2026-99246", "notes": [ { "category": "description", "text": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: protect node reset trace dump with node lock\n\nThe tipc_node_reset_links trace event asks tipc_node_dump() to walk the\nnode's link entries. Unlike the other node events that request link data,\nthis event runs without the node lock.\n\nThis permits bearer teardown to free a link while the trace callback is\ndumping it:\n\n CPU 0 CPU 1\n trace_tipc_node_reset_links()\n tipc_node_dump()\n l = n->links[0].link\n tipc_node_write_lock()\n kfree(l)\n n->links[0].link = NULL\n tipc_node_write_unlock()\n tipc_link_dump(l)\n\ntipc_link_dump() then dereferences the stale pointer. KASAN reported:\n\n BUG: KASAN: slab-use-after-free in tipc_link_dump\n Read of size 4 by task poc/115\n Call Trace:\n tipc_link_dump+0x10cb/0x16b0\n tipc_node_dump+0x4bb/0x740\n trace_event_raw_event_tipc_node_class+0x258/0x360\n tipc_node_reset_links+0x14d/0x1a0\n tipc_rcv+0x13f5/0x3030\n tipc_udp_recv+0x4e3/0x670\n Allocated by task 0:\n tipc_link_create+0x1e1/0x1020\n tipc_node_check_dest+0x7d2/0x11a0\n tipc_disc_rcv+0xdbf/0x1430\n Freed by task 89:\n kfree+0x131/0x3c0\n tipc_node_link_down+0x267/0x4b0\n tipc_node_delete_links+0xec/0x160\n bearer_disable+0x107/0x260\n\nTake the node write lock around the trace event. This serializes the\ndump against tipc_node_link_down(delete=true), which frees the link\nunder the same write lock.", "title": "Vulnerability description" } ], "product_status": { "fixed": [ "Amazon-Linux-2:bpftool-0:5.10.273-274.1999.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:kernel-0:5.10.273-274.1999.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:kernel-devel-0:5.10.273-274.1999.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:kernel-headers-0:5.10.273-274.1999.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:kernel-tools-0:5.10.273-274.1999.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:kernel-tools-devel-0:5.10.273-274.1999.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:perf-0:5.10.273-274.1999.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:python-perf-0:5.10.273-274.1999.amzn2.tuxcare.els1.x86_64" ], "known_affected": [ "Amazon-Linux-2:bpftool-0:5.10.259-258.1046.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:bpftool-0:5.10.259-258.1046.amzn2.tuxcare.els2.x86_64", 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"external", "summary": "https://git.kernel.org/stable/c/6abd93d01b0f495f29201925a5ee8e6a583c4044", "url": "https://git.kernel.org/stable/c/6abd93d01b0f495f29201925a5ee8e6a583c4044" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/6e492cb98ca69cc1145175e23e22e3b84da7f26d", "url": "https://git.kernel.org/stable/c/6e492cb98ca69cc1145175e23e22e3b84da7f26d" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/7bb6a35bd6d69019539d8782fb590fd2aa8a3236", "url": "https://git.kernel.org/stable/c/7bb6a35bd6d69019539d8782fb590fd2aa8a3236" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/a6101d62ccfa153db8c218ce59362b8e0316fd4f", "url": "https://git.kernel.org/stable/c/a6101d62ccfa153db8c218ce59362b8e0316fd4f" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/b8b7d28dc2b7472ffd1eff3954c38f1976b21a7b", "url": "https://git.kernel.org/stable/c/b8b7d28dc2b7472ffd1eff3954c38f1976b21a7b" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/c8b72ca0918e95f708f67c8b3e69b05290f2b6d2", "url": "https://git.kernel.org/stable/c/c8b72ca0918e95f708f67c8b3e69b05290f2b6d2" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/dddf197f29ba5e47a476dde82bf542ca2e0d5e5e", "url": "https://git.kernel.org/stable/c/dddf197f29ba5e47a476dde82bf542ca2e0d5e5e" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/fa8c78c0e49aa11fae116fd841e41aa8f2d68751", "url": "https://git.kernel.org/stable/c/fa8c78c0e49aa11fae116fd841e41aa8f2d68751" } ], "release_date": "2026-11-03T12:17:00Z", "remediations": [ { "category": "vendor_fix", "date": "2026-11-05T12:53:42.499096Z", "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2026:1793883221", "product_ids": [ "Amazon-Linux-2:bpftool-0:5.10.273-274.1999.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:kernel-0:5.10.273-274.1999.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:kernel-devel-0:5.10.273-274.1999.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:kernel-headers-0:5.10.273-274.1999.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:kernel-tools-0:5.10.273-274.1999.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:kernel-tools-devel-0:5.10.273-274.1999.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:perf-0:5.10.273-274.1999.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:python-perf-0:5.10.273-274.1999.amzn2.tuxcare.els1.x86_64" ], "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1793883221" }, { "category": "none_available", "date": "2026-11-03T12:17:00Z", "details": "Affected", "product_ids": [ "Amazon-Linux-2:bpftool-0:5.10.259-258.1046.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:bpftool-0:5.10.259-258.1046.amzn2.tuxcare.els2.x86_64", "Amazon-Linux-2:bpftool-0:5.10.272-271.1109.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:bpftool-0:5.10.272-271.1109.amzn2.tuxcare.els2.x86_64", "Amazon-Linux-2:bpftool-0:5.10.273-274.1999.amzn2.x86_64", 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