Vulnerability-Lookup

FKIE_CVE-2026-64167

Vulnerability from fkie_nvd - Published: 2026-07-19 16:17 - Updated: 2026-08-13 15:31

Severity

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a6715d7ec472a476db17787697a4abda62962284	Patch
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a6ac6721326a75ff2d14c68db05f93b576d8762f	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/liveupdate/kexec_handover.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a6ac6721326a75ff2d14c68db05f93b576d8762f",
              "status": "affected",
              "version": "d7255959b69a4e727c61eb04231d11390d4f391e",
              "versionType": "git"
            },
            {
              "lessThan": "a6715d7ec472a476db17787697a4abda62962284",
              "status": "affected",
              "version": "d7255959b69a4e727c61eb04231d11390d4f391e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "kernel/liveupdate/kexec_handover.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.19"
            },
            {
              "lessThan": "6.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
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          "cpeMatch": [
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              "versionEndExcluding": "7.0.11",
              "versionStartIncluding": "6.19",
              "vulnerable": true
            },
            {
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        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nkho: skip KHO for crash kernel\n\nkho_fill_kimage() unconditionally populates the kimage with KHO\nmetadata for every kexec image type. When the image is a crash kernel,\nthis can be problematic as the crash kernel can run in a small reserved\nregion and the KHO scratch areas can sit outside it.\nThe crash kernel then faults during kho_memory_init() when it\ntries phys_to_virt() on the KHO FDT address:\n\n  Unable to handle kernel paging request at virtual address xxxxxxxx\n  ...\n    fdt_offset_ptr+...\n    fdt_check_node_offset_+...\n    fdt_first_property_offset+...\n    fdt_get_property_namelen_+...\n    fdt_getprop+...\n    kho_memory_init+...\n    mm_core_init+...\n    start_kernel+...\n\nkho_locate_mem_hole() already skips KHO logic for KEXEC_TYPE_CRASH\nimages, but kho_fill_kimage() was missing the same guard. As\nkho_fill_kimage() is the single point that populates image-\u003ekho.fdt\nand image-\u003ekho.scratch, fixing it here is sufficient for both arm64\nand x86 as the FDT and boot_params path are bailing out when these\nfields are unset."
    }
  ],
  "id": "CVE-2026-64167",
  "lastModified": "2026-08-13T15:31:37.510",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-07-19T16:17:58.833",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/a6715d7ec472a476db17787697a4abda62962284"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/a6ac6721326a75ff2d14c68db05f93b576d8762f"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-64167 (GCVE-0-2026-64167)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:40 – Updated: 2026-07-19 15:40

Title

kho: skip KHO for crash kernel

Summary

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6843 records in the last 180 days details

References

2 references

URL	Tags
https://git.kernel.org/stable/c/a6ac6721326a75ff2…
https://git.kernel.org/stable/c/a6715d7ec472a476d…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: d7255959b69a4e727c61eb04231d11390d4f391e , < a6ac6721326a75ff2d14c68db05f93b576d8762f (git) Affected: d7255959b69a4e727c61eb04231d11390d4f391e , < a6715d7ec472a476db17787697a4abda62962284 (git)
Linux	Linux	Affected: 6.19 Unaffected: 0 , < 6.19 (semver) Unaffected: 7.0.11 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/liveupdate/kexec_handover.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a6ac6721326a75ff2d14c68db05f93b576d8762f",
              "status": "affected",
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              "versionType": "git"
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              "lessThan": "a6715d7ec472a476db17787697a4abda62962284",
              "status": "affected",
              "version": "d7255959b69a4e727c61eb04231d11390d4f391e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.19"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
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                }
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nkho: skip KHO for crash kernel\n\nkho_fill_kimage() unconditionally populates the kimage with KHO\nmetadata for every kexec image type. When the image is a crash kernel,\nthis can be problematic as the crash kernel can run in a small reserved\nregion and the KHO scratch areas can sit outside it.\nThe crash kernel then faults during kho_memory_init() when it\ntries phys_to_virt() on the KHO FDT address:\n\n  Unable to handle kernel paging request at virtual address xxxxxxxx\n  ...\n    fdt_offset_ptr+...\n    fdt_check_node_offset_+...\n    fdt_first_property_offset+...\n    fdt_get_property_namelen_+...\n    fdt_getprop+...\n    kho_memory_init+...\n    mm_core_init+...\n    start_kernel+...\n\nkho_locate_mem_hole() already skips KHO logic for KEXEC_TYPE_CRASH\nimages, but kho_fill_kimage() was missing the same guard. As\nkho_fill_kimage() is the single point that populates image-\u003ekho.fdt\nand image-\u003ekho.scratch, fixing it here is sufficient for both arm64\nand x86 as the FDT and boot_params path are bailing out when these\nfields are unset."
        }
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    "dateReserved": "2026-07-19T07:54:57.038Z",
    "dateUpdated": "2026-07-19T15:40:52.023Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

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