kho: skip KHO for crash kernel

{
  "id": "3489fca5bf27f018a3ffc610ecde8480aa30dd0ecc0e5078998b9ca4863d3c49",
  "url": "https://osv.dev/vulnerability/CVE-2026-64167",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "kho: skip KHO for crash kernel",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: kho: skip KHO for crash kernel kho_fill_kimage() unconditionally populates the kimage with KHO metadata for every kexec image type. When the image is a crash kernel, this can be problematic as the crash kernel can run in a small reserved region and the KHO scratch areas can sit outside it. The crash kernel then faults during kho_memory_init() when it tries phys_to_virt() on the KHO FDT address: Unable to handle kernel paging request at virtual address xxxxxxxx ... fdt_offset_ptr+... fdt_check_node_offset_+... fdt_first_property_offset+... fdt_get_property_namelen_+... fdt_getprop+... kho_memory_init+... mm_core_init+... start_kernel+... kho_locate_mem_hole() already skips KHO logic for KEXEC_TYPE_CRASH images, but kho_fill_kimage() was missing the same guard. As kho_fill_kimage() is the single point that populates image->kho.fdt and image->kho.scratch, fixing it here is sufficient for both arm64 and x86 as the FDT and boot_params path are bailing out when these fields are unset.",
    "evidence": "osv:CVE-2026-64167",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "7.0.11",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-64167",
      "aliases": [
        "CVE-2026-64167"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "d7255959b69a4e727c61eb04231d11390d4f391e"
                },
                {
                  "fixed": "a6ac6721326a75ff2d14c68db05f93b576d8762f"
                },
                {
                  "fixed": "a6715d7ec472a476db17787697a4abda62962284"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64167.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.0.11"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64167.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:42.083096563Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/a6715d7ec472a476db17787697a4abda62962284",
        "https://git.kernel.org/stable/c/a6ac6721326a75ff2d14c68db05f93b576d8762f",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64167.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-64167",
        "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/2026/64xxx/CVE-2026-64167.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-64167",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 509774,
  "published_at": "2026-07-19T15:40:52.023+00:00"
}