{ "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-2026-97939-els_os-amazonlinux2els.json" } ], "tracking": { "current_release_date": "2026-11-07T21:42:43Z", "generator": { "date": "2026-11-07T21:42:43Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2026-97939-ELS_OS-AMAZONLINUX2ELS", "initial_release_date": "2026-09-25T11:17:00Z", "revision_history": [ { "date": "2026-09-25T11:17:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-11-07T21:42:43Z", "number": "2", "summary": "Official Publication" } ], "status": "final", "version": "2" }, "title": "Security 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"vulnerabilities": [ { "cve": "CVE-2026-97939", "notes": [ { "category": "description", "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nipmr: account multicast table and route memory\n\nA netadmin in a user+net namespace can create many IPv4 and IPv6\nmulticast routing tables with MRT_TABLE and MRT6_TABLE. Each unseen\nid allocates an mr_table via the shared mr_table_alloc(), links it\ninto the per-net list, and leaves it until netns teardown. Those\nobjects were not charged to memcg, so the host unreclaimable slab\ngrows with the table count.\n\nAccount mr_table allocations with GFP_KERNEL_ACCOUNT and mark the\nIPv4/IPv6 MFC caches SLAB_ACCOUNT. This matches the established\nhandling of IP addresses, routes and alternate interface names.\n\nUnresolved MFC entries are still allocated from softIRQ with\nGFP_ATOMIC and are not charged. They expire after 10 seconds and are\nbounded by the socket receive queue; see commit 0079ad8e8dc3\n(\"ipmr: remove hard code cache_resolve_queue_len limit\").", "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", 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URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2026-97939" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/0264b3ee09b118fec8a5471b4ca288f8ab84722f", "url": "https://git.kernel.org/stable/c/0264b3ee09b118fec8a5471b4ca288f8ab84722f" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/20424f267c9dbdfcade28b2b2306767a7dfb43d1", "url": "https://git.kernel.org/stable/c/20424f267c9dbdfcade28b2b2306767a7dfb43d1" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/21e0749e8ef272ac7e3eefe0fa488a5983f4b038", "url": "https://git.kernel.org/stable/c/21e0749e8ef272ac7e3eefe0fa488a5983f4b038" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/3e808d8dfebd8f114a747bd90c8f7d2a6fd7474f", "url": "https://git.kernel.org/stable/c/3e808d8dfebd8f114a747bd90c8f7d2a6fd7474f" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/57c523e95ea2608a19e6bfcd664d641ddf7bc4b4", "url": "https://git.kernel.org/stable/c/57c523e95ea2608a19e6bfcd664d641ddf7bc4b4" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/b7ee18725f2292ab554aa96a101ae42d45f008bd", "url": "https://git.kernel.org/stable/c/b7ee18725f2292ab554aa96a101ae42d45f008bd" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/d0a2e2a4ee6bfe51e398bfb6921a7d0f4c26bc1c", "url": "https://git.kernel.org/stable/c/d0a2e2a4ee6bfe51e398bfb6921a7d0f4c26bc1c" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/ec1c6140394ee87127479bc500a3158b125bf07a", "url": "https://git.kernel.org/stable/c/ec1c6140394ee87127479bc500a3158b125bf07a" } ], "release_date": "2026-09-25T11:17:00Z", "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": "2026-09-25T11:17:00Z", "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", 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