arm64: acpi: Harden get_cpu_for_acpi_id() against missing CPU entry

{
  "id": "e514156f4d35c0b57fd531bd0b4b4af50b535076af37c16c0f2032b8fe671af4",
  "url": "https://osv.dev/vulnerability/CVE-2024-46822",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "arm64: acpi: Harden get_cpu_for_acpi_id() against missing CPU entry",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: arm64: acpi: Harden get_cpu_for_acpi_id() against missing CPU entry In a review discussion of the changes to support vCPU hotplug where a check was added on the GICC being enabled if was online, it was noted that there is need to map back to the cpu and use that to index into a cpumask. As such, a valid ID is needed. If an MPIDR check fails in acpi_map_gic_cpu_interface() it is possible for the entry in cpu_madt_gicc[cpu] == NULL. This function would then cause a NULL pointer dereference. Whilst a path to trigger this has not been established, harden this caller against the possibility.",
    "evidence": "osv:CVE-2024-46822",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.4.284",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.10.226",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.167",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.110",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.51",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.10.10",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2024-46822",
      "aliases": [
        "CVE-2024-46822"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                  "introduced": "0be7320a635c2e434e8b67e0e9474a85ceb421c4"
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                {
                  "fixed": "f57769ff6fa7f97f1296965f20e8a2bb3ee9fd0f"
                },
                {
                  "fixed": "4c3b21204abb4fa3ab310fbbb5cf7f0e85f3a1bc"
                },
                {
                  "fixed": "945be49f4e832a9184c313fdf8917475438a795b"
                },
                {
                  "fixed": "40cae0df42e5e7f7a1c0f32deed9c4027c1ba94e"
                },
                {
                  "fixed": "62ca6d3a905b4c40cd942f3cc645a6718f8bc7e7"
                },
                {
                  "fixed": "bc7fbb37e3d2df59336eadbd6a56be632e3c7df7"
                },
                {
                  "fixed": "2488444274c70038eb6b686cba5f1ce48ebb9cdd"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-46822.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "3.7.0"
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                {
                  "fixed": "5.4.284"
                }
              ]
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            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.5.0"
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                {
                  "fixed": "5.10.226"
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                  "introduced": "5.11.0"
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              "type": "ECOSYSTEM",
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                  "introduced": "5.16.0"
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                  "fixed": "6.1.110"
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            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.51"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.10.10"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-46822.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:31.491254975Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/2488444274c70038eb6b686cba5f1ce48ebb9cdd",
        "https://git.kernel.org/stable/c/40cae0df42e5e7f7a1c0f32deed9c4027c1ba94e",
        "https://git.kernel.org/stable/c/4c3b21204abb4fa3ab310fbbb5cf7f0e85f3a1bc",
        "https://git.kernel.org/stable/c/62ca6d3a905b4c40cd942f3cc645a6718f8bc7e7",
        "https://git.kernel.org/stable/c/945be49f4e832a9184c313fdf8917475438a795b",
        "https://git.kernel.org/stable/c/bc7fbb37e3d2df59336eadbd6a56be632e3c7df7",
        "https://git.kernel.org/stable/c/f57769ff6fa7f97f1296965f20e8a2bb3ee9fd0f",
        "https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html",
        "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/46xxx/CVE-2024-46822.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-46822",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/46xxx/CVE-2024-46822.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-46822",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 498394,
  "published_at": "2024-09-27T12:39:23.345+00:00"
}