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        "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.",
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          "date": "2026-07-25T10:17:00Z",
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          "name": "linux-image-4.19.0-28-amd64-unsigned-0:4.19.325-1+tuxcare.els1.amd64 as a component of Debian 10",
          "product_id": "Debian-10:linux-image-4.19.0-28-amd64-unsigned-0:4.19.325-1+tuxcare.els1.amd64"
        },
        "product_reference": "linux-image-4.19.0-28-amd64-unsigned-0:4.19.325-1+tuxcare.els1.amd64",
        "relates_to_product_reference": "Debian-10"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-64423",
      "cwe": {
        "id": "CWE-416",
        "name": "Use After Free"
      },
      "notes": [
        {
          "category": "description",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: igmp: remove multicast group from hash table on device destruction\n\nWhen a device is destroyed under RTNL, ip_mc_destroy_dev() iterates through\nthe multicast list and calls ip_ma_put() on each membership, scheduling\nthem for RCU reclamation. However, they are not unlinked from the device's\nmulticast hash table (mc_hash).\n\nSince the device remains published in dev->ip_ptr until after\nip_mc_destroy_dev() completes, concurrent RCU readers traversing mc_hash\ncan still locate and access the multicast group after its refcount is\ndecremented. If the RCU callback runs and frees the group while a reader is\naccessing it, a use-after-free occurs.\n\nFix this by unlinking the multicast group from mc_hash using\nip_mc_hash_remove() before scheduling it for reclamation.\n\nBUG: KASAN: slab-use-after-free in ip_check_mc_rcu+0x149/0x3f0\nRead of size 4 at addr ffff888009bf1408 by task mausezahn/2276\n\nCall Trace:\n <IRQ>\n dump_stack_lvl+0x67/0x90\n print_report+0x175/0x7c0\n kasan_report+0x147/0x180\n ip_check_mc_rcu+0x149/0x3f0\n udp_v4_early_demux+0x36d/0x12d0\n ip_rcv_finish_core+0xb8b/0x1390\n ip_rcv_finish+0x54/0x120\n NF_HOOK+0x213/0x2b0\n __netif_receive_skb+0x126/0x340\n process_backlog+0x4f2/0xf00\n __napi_poll+0x92/0x2c0\n net_rx_action+0x583/0xc60\n handle_softirqs+0x236/0x7f0\n do_softirq+0x57/0x80\n </IRQ>\n\nAllocated by task 2239:\n kasan_save_track+0x3e/0x80\n __kasan_kmalloc+0x72/0x90\n ____ip_mc_inc_group+0x31a/0xa40\n __ip_mc_join_group+0x334/0x3f0\n do_ip_setsockopt+0x16fa/0x2010\n ip_setsockopt+0x3f/0x90\n do_sock_setsockopt+0x1ad/0x300\n\nFreed by task 0:\n kasan_save_track+0x3e/0x80\n kasan_save_free_info+0x40/0x50\n __kasan_slab_free+0x3a/0x60\n __rcu_free_sheaf_prepare+0xd4/0x220\n rcu_free_sheaf+0x36/0x190\n rcu_core+0x8d9/0x12f0\n handle_softirqs+0x236/0x7f0",
          "title": "Vulnerability description"
        }
      ],
      "product_status": {
        "under_investigation": [
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          "Debian-10:hyperv-daemons-0:4.19.325-2+tuxcare.els1.amd64",
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          "Debian-10:libbpf4.19-0:4.19.325-1+tuxcare.els1.amd64",
          "Debian-10:libbpf4.19-0:4.19.325-2+tuxcare.els1.amd64",
          "Debian-10:libcpupower-dev-0:4.19.325-1+tuxcare.els1.amd64",
          "Debian-10:libcpupower-dev-0:4.19.325-2+tuxcare.els1.amd64",
          "Debian-10:libcpupower1-0:4.19.325-1+tuxcare.els1.amd64",
          "Debian-10:libcpupower1-0:4.19.325-2+tuxcare.els1.amd64",
          "Debian-10:linux-compiler-gcc-8-x86-0:4.19.325-1+tuxcare.els1.amd64",
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          "Debian-10:linux-source-4.19-0:4.19.325-2+tuxcare.els1.all",
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          "Debian-10:linux-support-4.19.0-29-0:4.19.325-2+tuxcare.els1.all"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2026-64423"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/2ca18df1c2611f70eb3eb487e02ae85eb703b284",
          "url": "https://git.kernel.org/stable/c/2ca18df1c2611f70eb3eb487e02ae85eb703b284"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/412ba7def06ffe974ba9a1d862b022362c54ffa5",
          "url": "https://git.kernel.org/stable/c/412ba7def06ffe974ba9a1d862b022362c54ffa5"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/5f42729d74bd6c61306d864423290d92962de4e1",
          "url": "https://git.kernel.org/stable/c/5f42729d74bd6c61306d864423290d92962de4e1"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/76d030ac95e17f91d69a595f17ebc5979700cf9a",
          "url": "https://git.kernel.org/stable/c/76d030ac95e17f91d69a595f17ebc5979700cf9a"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/7993211bde166471dffac074dc965489f86531f8",
          "url": "https://git.kernel.org/stable/c/7993211bde166471dffac074dc965489f86531f8"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/8820b530cb2388503d7418228d03ba074bf7a03e",
          "url": "https://git.kernel.org/stable/c/8820b530cb2388503d7418228d03ba074bf7a03e"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/c6cb5f8ebe1c1a78710c19f102db9fe48b9e6ba9",
          "url": "https://git.kernel.org/stable/c/c6cb5f8ebe1c1a78710c19f102db9fe48b9e6ba9"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/f91883031e5a62877a29ce139442973cbea769f1",
          "url": "https://git.kernel.org/stable/c/f91883031e5a62877a29ce139442973cbea769f1"
        },
        {
          "category": "external",
          "summary": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html",
          "url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
        }
      ],
      "release_date": "2026-07-25T10:17:00Z",
      "remediations": [
        {
          "category": "none_available",
          "date": "2026-09-05T13:30:19.531070Z",
          "details": "Affected",
          "product_ids": [
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    }
  ]
}