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        "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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      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "linux-headers-4.19.0-28-amd64-0:4.19.325-1+tuxcare.els1.amd64 as a component of Debian 10",
          "product_id": "Debian-10:linux-headers-4.19.0-28-amd64-0:4.19.325-1+tuxcare.els1.amd64"
        },
        "product_reference": "linux-headers-4.19.0-28-amd64-0:4.19.325-1+tuxcare.els1.amd64",
        "relates_to_product_reference": "Debian-10"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "hyperv-daemons-0:4.19.325-1+tuxcare.els1.amd64 as a component of Debian 10",
          "product_id": "Debian-10:hyperv-daemons-0:4.19.325-1+tuxcare.els1.amd64"
        },
        "product_reference": "hyperv-daemons-0:4.19.325-1+tuxcare.els1.amd64",
        "relates_to_product_reference": "Debian-10"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "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-2024-56558",
      "cwe": {
        "id": "CWE-416",
        "name": "Use After Free"
      },
      "notes": [
        {
          "category": "description",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: make sure exp active before svc_export_show\n\nThe function `e_show` was called with protection from RCU. This only\nensures that `exp` will not be freed. Therefore, the reference count for\n`exp` can drop to zero, which will trigger a refcount use-after-free\nwarning when `exp_get` is called. To resolve this issue, use\n`cache_get_rcu` to ensure that `exp` remains active.\n\n------------[ cut here ]------------\nrefcount_t: addition on 0; use-after-free.\nWARNING: CPU: 3 PID: 819 at lib/refcount.c:25\nrefcount_warn_saturate+0xb1/0x120\nCPU: 3 UID: 0 PID: 819 Comm: cat Not tainted 6.12.0-rc3+ #1\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS\n1.16.1-2.fc37 04/01/2014\nRIP: 0010:refcount_warn_saturate+0xb1/0x120\n...\nCall Trace:\n <TASK>\n e_show+0x20b/0x230 [nfsd]\n seq_read_iter+0x589/0x770\n seq_read+0x1e5/0x270\n vfs_read+0x125/0x530\n ksys_read+0xc1/0x160\n do_syscall_64+0x5f/0x170\n entry_SYSCALL_64_after_hwframe+0x76/0x7e",
          "title": "Vulnerability description"
        },
        {
          "category": "other",
          "text": "TuxCare has assessed that this vulnerability does not impact any currently supported TuxCare products. This evaluation may change as new information becomes available. For additional details regarding this vulnerability and affected products, refer to the provided references.",
          "title": "Statement"
        }
      ],
      "product_status": {
        "known_not_affected": [
          "Debian-10:hyperv-daemons-0:4.19.325-1+tuxcare.els1.amd64",
          "Debian-10:libbpf-dev-0:4.19.325-1+tuxcare.els1.amd64",
          "Debian-10:libbpf4.19-0:4.19.325-1+tuxcare.els1.amd64",
          "Debian-10:libcpupower-dev-0:4.19.325-1+tuxcare.els1.amd64",
          "Debian-10:libcpupower1-0:4.19.325-1+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-headers-4.19.0-28-all-amd64-0:4.19.325-1+tuxcare.els1.amd64",
          "Debian-10:linux-headers-4.19.0-28-amd64-0:4.19.325-1+tuxcare.els1.amd64",
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          "Debian-10:linux-image-amd64-signed-template-0:4.19.325-1+tuxcare.els1.amd64",
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          "Debian-10:linux-libc-dev-0:4.19.325-1+tuxcare.els1.amd64",
          "Debian-10:linux-perf-4.19-0:4.19.325-1+tuxcare.els1.amd64",
          "Debian-10:linux-source-4.19-0:4.19.325-1+tuxcare.els1.all",
          "Debian-10:linux-support-4.19.0-28-0:4.19.325-1+tuxcare.els1.all"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2024-56558"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/1cecfdbc6bfc89c516d286884c7f29267b95de2b",
          "url": "https://git.kernel.org/stable/c/1cecfdbc6bfc89c516d286884c7f29267b95de2b"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/6cefcadd34e3c71c81ea64b899a0daa86314a51a",
          "url": "https://git.kernel.org/stable/c/6cefcadd34e3c71c81ea64b899a0daa86314a51a"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/7365d1f8de63cffdbbaa2287ce0205438e1a922f",
          "url": "https://git.kernel.org/stable/c/7365d1f8de63cffdbbaa2287ce0205438e1a922f"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/7d8f7816bebcd2e7400bb4d786eccb8f33c9f9ec",
          "url": "https://git.kernel.org/stable/c/7d8f7816bebcd2e7400bb4d786eccb8f33c9f9ec"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/7fd29d284b55c2274f7a748e6c5f25b4758b8da5",
          "url": "https://git.kernel.org/stable/c/7fd29d284b55c2274f7a748e6c5f25b4758b8da5"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/be8f982c369c965faffa198b46060f8853e0f1f0",
          "url": "https://git.kernel.org/stable/c/be8f982c369c965faffa198b46060f8853e0f1f0"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/e2fa0d0e327279a8defb87b263cd0bf288fd9261",
          "url": "https://git.kernel.org/stable/c/e2fa0d0e327279a8defb87b263cd0bf288fd9261"
        },
        {
          "category": "external",
          "summary": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html",
          "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
        },
        {
          "category": "external",
          "summary": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html",
          "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
        }
      ],
      "release_date": "2024-12-27T14:23:03Z",
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        },
        {
          "category": "impact",
          "date": "2026-08-06T12:15:57.071944Z",
          "details": "Not affected: the export-cache refcount UAF requires RCU-only lockless export traversal (cache_seq_start_rcu), introduced upstream in 9ceddd9da134 (v4.20); debian10els (4.19) never received that conversion and still walks exports under the locked cache_seq_start, so exp_get() in e_show() cannot hit a zero refcount.",
          "product_ids": [
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            "Debian-10:libcpupower-dev-0:4.19.325-1+tuxcare.els1.amd64",
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      ]
    }
  ]
}