{ "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-2026-99213-els_os-amazonlinux2els.json" } ], "tracking": { "current_release_date": "2026-11-07T21:43:02Z", "generator": { "date": "2026-11-07T21:43:02Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2026-99213-ELS_OS-AMAZONLINUX2ELS", "initial_release_date": "2026-10-28T11:17:00Z", "revision_history": [ { "date": "2026-10-28T11:17:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-11-07T21:43:02Z", "number": "2", "summary": "Official Publication" } ], "status": "final", "version": "2" }, "title": "Security 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"vulnerabilities": [ { "cve": "CVE-2026-99213", "notes": [ { "category": "description", "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nvsock: treat TCP_CLOSING as once-established\n\nHandle the TCP_ESTABLISHED -> TCP_CLOSING transition on OP_RST, which can\nrace with the connect loop. Immediately break and return 0 on\nESTABLISHED/CLOSING. The return value of connect() should reflect what\nhappened up to the point the connection was established or failed. Events\nthat occur afterwards must not affect it. E.g. even if OP_RW has already\nset sk_err, connect() should still return 0, not ENOBUFS because of it.\nAdapt the inaccurate comment above signal_pending().\n\nResetting a socket that is still present in connected_table can lead to\nmemory corruption. The reporter noted lost transports for in-flight skbs,\nand I have reproduced crashes caused by re-insertion into connected_table.\n\n list_add double add: new=, prev=, next=.\n kernel BUG at lib/list_debug.c:35!\n Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI\n Workqueue: vsock-loopback vsock_loopback_work\n RIP: 0010:__list_add_valid_or_report+0x11f/0x130\n Call Trace:\n vsock_insert_connected.cold+0xe/0x13\n virtio_transport_recv_pkt+0x10e9/0x1460\n vsock_loopback_work+0x305/0x480\n process_one_work+0xe4c/0x1560\n worker_thread+0x4f1/0xd60\n kthread+0x36e/0x470\n ret_from_fork+0x47b/0x6b0\n ret_from_fork_asm+0x1a/0x30\n\nThis fix is supplementary to commit 002541ef650b (\"vsock: Ignore\nsignal/timeout on connect() if already established\"). Details under Link.", "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", "Amazon-Linux-2:bpftool-0:5.10.272-271.1109.amzn2.tuxcare.els1.x86_64", 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"external", "summary": "https://git.kernel.org/stable/c/44d1ca05d6094a5d75c671a0545249186d790b8d", "url": "https://git.kernel.org/stable/c/44d1ca05d6094a5d75c671a0545249186d790b8d" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/4f6ac74fa594a918d41255c941256e1d51592d3b", "url": "https://git.kernel.org/stable/c/4f6ac74fa594a918d41255c941256e1d51592d3b" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/5f2ab77028602a22f0cc33cac063a313787cbeae", "url": "https://git.kernel.org/stable/c/5f2ab77028602a22f0cc33cac063a313787cbeae" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/baf1b5715640e434249ce7f63f94bd1a00938ef9", "url": "https://git.kernel.org/stable/c/baf1b5715640e434249ce7f63f94bd1a00938ef9" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/c2c5359ef2c33684fa3f3652fd761a483db8d1e7", "url": "https://git.kernel.org/stable/c/c2c5359ef2c33684fa3f3652fd761a483db8d1e7" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/deb972c7eea8d0bc3109c35c30a1c86d4939f811", "url": "https://git.kernel.org/stable/c/deb972c7eea8d0bc3109c35c30a1c86d4939f811" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/ea36ef3c229d54b552432d1290aee1d807f67fd5", "url": "https://git.kernel.org/stable/c/ea36ef3c229d54b552432d1290aee1d807f67fd5" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/f89770c7365748d9d6a2ae07d1c23497ca21ec07", "url": "https://git.kernel.org/stable/c/f89770c7365748d9d6a2ae07d1c23497ca21ec07" } ], "release_date": "2026-10-28T11:17:00Z", "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": "2026-10-28T11:17:00Z", "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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