Vulnerability-Lookup

FKIE_CVE-2024-46864

Vulnerability from fkie_nvd - Published: 2024-09-27 13:15 - Updated: 2026-06-17 07:56

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: x86/hyperv: fix kexec crash due to VP assist page corruption commit 9636be85cc5b ("x86/hyperv: Fix hyperv_pcpu_input_arg handling when CPUs go online/offline") introduces a new cpuhp state for hyperv initialization. cpuhp_setup_state() returns the state number if state is CPUHP_AP_ONLINE_DYN or CPUHP_BP_PREPARE_DYN and 0 for all other states. For the hyperv case, since a new cpuhp state was introduced it would return 0. However, in hv_machine_shutdown(), the cpuhp_remove_state() call is conditioned upon "hyperv_init_cpuhp > 0". This will never be true and so hv_cpu_die() won't be called on all CPUs. This means the VP assist page won't be reset. When the kexec kernel tries to setup the VP assist page again, the hypervisor corrupts the memory region of the old VP assist page causing a panic in case the kexec kernel is using that memory elsewhere. This was originally fixed in commit dfe94d4086e4 ("x86/hyperv: Fix kexec panic/hang issues"). Get rid of hyperv_init_cpuhp entirely since we are no longer using a dynamic cpuhp state and use CPUHP_AP_HYPERV_ONLINE directly with cpuhp_remove_state().

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2ae1beb3ab4f28868cc5d1541d05e1fbee3ad825	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b9af6418279c4cf73ca073f8ea024992b38be8ab	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d6f018a3b49d0a94ddbd0e479c2af6b19724e434	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.11
linux	linux_kernel	6.11
linux	linux_kernel	6.11
linux	linux_kernel	6.11
linux	linux_kernel	6.11
linux	linux_kernel	6.11
linux	linux_kernel	6.11

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/hyperv/hv_init.c",
            "arch/x86/include/asm/mshyperv.h",
            "arch/x86/kernel/cpu/mshyperv.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2ae1beb3ab4f28868cc5d1541d05e1fbee3ad825",
              "status": "affected",
              "version": "9636be85cc5bdd8b7a7f6a53405cbcc52161c93c",
              "versionType": "git"
            },
            {
              "lessThan": "d6f018a3b49d0a94ddbd0e479c2af6b19724e434",
              "status": "affected",
              "version": "9636be85cc5bdd8b7a7f6a53405cbcc52161c93c",
              "versionType": "git"
            },
            {
              "lessThan": "b9af6418279c4cf73ca073f8ea024992b38be8ab",
              "status": "affected",
              "version": "9636be85cc5bdd8b7a7f6a53405cbcc52161c93c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/hyperv/hv_init.c",
            "arch/x86/include/asm/mshyperv.h",
            "arch/x86/kernel/cpu/mshyperv.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.4"
            },
            {
              "lessThan": "6.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.10.*",
              "status": "unaffected",
              "version": "6.10.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.11",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "4B069D1F-CDB1-421E-A7FE-281C7312550A",
              "versionEndExcluding": "6.6.52",
              "versionStartIncluding": "6.4",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "FCF7772B-1996-473C-B3BE-95A8ECD6556C",
              "versionEndIncluding": "6.10.11",
              "versionStartIncluding": "6.7",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "8B3CE743-2126-47A3-8B7C-822B502CF119",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "4DEB27E7-30AA-45CC-8934-B89263EF3551",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "E0005AEF-856E-47EB-BFE4-90C46899394D",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc4:*:*:*:*:*:*",
              "matchCriteriaId": "39889A68-6D34-47A6-82FC-CD0BF23D6754",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc5:*:*:*:*:*:*",
              "matchCriteriaId": "B8383ABF-1457-401F-9B61-EE50F4C61F4F",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc6:*:*:*:*:*:*",
              "matchCriteriaId": "B77A9280-37E6-49AD-B559-5B23A3B1DC3D",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc7:*:*:*:*:*:*",
              "matchCriteriaId": "DE5298B3-04B4-4F3E-B186-01A58B5C75A6",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/hyperv: fix kexec crash due to VP assist page corruption\n\ncommit 9636be85cc5b (\"x86/hyperv: Fix hyperv_pcpu_input_arg handling when\nCPUs go online/offline\") introduces a new cpuhp state for hyperv\ninitialization.\n\ncpuhp_setup_state() returns the state number if state is\nCPUHP_AP_ONLINE_DYN or CPUHP_BP_PREPARE_DYN and 0 for all other states.\nFor the hyperv case, since a new cpuhp state was introduced it would\nreturn 0. However, in hv_machine_shutdown(), the cpuhp_remove_state() call\nis conditioned upon \"hyperv_init_cpuhp \u003e 0\". This will never be true and\nso hv_cpu_die() won\u0027t be called on all CPUs. This means the VP assist page\nwon\u0027t be reset. When the kexec kernel tries to setup the VP assist page\nagain, the hypervisor corrupts the memory region of the old VP assist page\ncausing a panic in case the kexec kernel is using that memory elsewhere.\nThis was originally fixed in commit dfe94d4086e4 (\"x86/hyperv: Fix kexec\npanic/hang issues\").\n\nGet rid of hyperv_init_cpuhp entirely since we are no longer using a\ndynamic cpuhp state and use CPUHP_AP_HYPERV_ONLINE directly with\ncpuhp_remove_state()."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: x86/hyperv: fix kexec crash due to VP assist page corrupt commit 9636be85cc5b (\"x86/hyperv: Fix hyperv_pcpu_input_arg management when CPUs go online/offline\") introduce un nuevo estado de cpuhp para la inicializaci\u00f3n de hyperv. cpuhp_setup_state() devuelve el n\u00famero de estado si el estado es CPUHP_AP_ONLINE_DYN o CPUHP_BP_PREPARE_DYN y 0 para todos los dem\u00e1s estados. Para el caso de hyperv, dado que se introdujo un nuevo estado de cpuhp, devolver\u00eda 0. Sin embargo, en hv_machine_shutdown(), la llamada a cpuhp_remove_state() est\u00e1 condicionada a \"hyperv_init_cpuhp \u0026gt; 0\". Esto nunca ser\u00e1 cierto y, por lo tanto, hv_cpu_die() no se llamar\u00e1 en todas las CPU. Esto significa que la p\u00e1gina de asistencia de VP no se restablecer\u00e1. Cuando el kernel de kexec intenta configurar la p\u00e1gina de asistencia de VP nuevamente, el hipervisor corrompe la regi\u00f3n de memoria de la p\u00e1gina de asistencia de VP anterior, lo que provoca un p\u00e1nico en caso de que el kernel de kexec est\u00e9 usando esa memoria en otro lugar. Esto se solucion\u00f3 originalmente en el commit dfe94d4086e4 (\"x86/hyperv: Fix kexec panic/hang issues\"). Desh\u00e1gase de hyperv_init_cpuhp por completo, ya que ya no estamos usando un estado de cpuhp din\u00e1mico y use CPUHP_AP_HYPERV_ONLINE directamente con cpuhp_remove_state()."
    }
  ],
  "id": "CVE-2024-46864",
  "lastModified": "2026-06-17T07:56:06.493",
  "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"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-46864",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-09-29T13:43:47.814007Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-09-27T13:15:17.747",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/2ae1beb3ab4f28868cc5d1541d05e1fbee3ad825"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/b9af6418279c4cf73ca073f8ea024992b38be8ab"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d6f018a3b49d0a94ddbd0e479c2af6b19724e434"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2024-46864 (GCVE-0-2024-46864)

Vulnerability from cvelistv5 – Published: 2024-09-27 12:42 – Updated: 2026-05-11 20:38

Title

x86/hyperv: fix kexec crash due to VP assist page corruption

Summary

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-29 13:43 UTC

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/2ae1beb3ab4f28868…
https://git.kernel.org/stable/c/d6f018a3b49d0a94d…
https://git.kernel.org/stable/c/b9af6418279c4cf73…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 9636be85cc5bdd8b7a7f6a53405cbcc52161c93c , < 2ae1beb3ab4f28868cc5d1541d05e1fbee3ad825 (git) Affected: 9636be85cc5bdd8b7a7f6a53405cbcc52161c93c , < d6f018a3b49d0a94ddbd0e479c2af6b19724e434 (git) Affected: 9636be85cc5bdd8b7a7f6a53405cbcc52161c93c , < b9af6418279c4cf73ca073f8ea024992b38be8ab (git)
Linux	Linux	Affected: 6.4 Unaffected: 0 , < 6.4 (semver) Unaffected: 6.6.52 , ≤ 6.6.* (semver) Unaffected: 6.10.11 , ≤ 6.10.* (semver) Unaffected: 6.11 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-46864",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-29T13:43:47.814007Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-29T13:45:38.100Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/hyperv/hv_init.c",
            "arch/x86/include/asm/mshyperv.h",
            "arch/x86/kernel/cpu/mshyperv.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2ae1beb3ab4f28868cc5d1541d05e1fbee3ad825",
              "status": "affected",
              "version": "9636be85cc5bdd8b7a7f6a53405cbcc52161c93c",
              "versionType": "git"
            },
            {
              "lessThan": "d6f018a3b49d0a94ddbd0e479c2af6b19724e434",
              "status": "affected",
              "version": "9636be85cc5bdd8b7a7f6a53405cbcc52161c93c",
              "versionType": "git"
            },
            {
              "lessThan": "b9af6418279c4cf73ca073f8ea024992b38be8ab",
              "status": "affected",
              "version": "9636be85cc5bdd8b7a7f6a53405cbcc52161c93c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/hyperv/hv_init.c",
            "arch/x86/include/asm/mshyperv.h",
            "arch/x86/kernel/cpu/mshyperv.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.4"
            },
            {
              "lessThan": "6.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.10.*",
              "status": "unaffected",
              "version": "6.10.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.11",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.52",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.10.11",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.11",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/hyperv: fix kexec crash due to VP assist page corruption\n\ncommit 9636be85cc5b (\"x86/hyperv: Fix hyperv_pcpu_input_arg handling when\nCPUs go online/offline\") introduces a new cpuhp state for hyperv\ninitialization.\n\ncpuhp_setup_state() returns the state number if state is\nCPUHP_AP_ONLINE_DYN or CPUHP_BP_PREPARE_DYN and 0 for all other states.\nFor the hyperv case, since a new cpuhp state was introduced it would\nreturn 0. However, in hv_machine_shutdown(), the cpuhp_remove_state() call\nis conditioned upon \"hyperv_init_cpuhp \u003e 0\". This will never be true and\nso hv_cpu_die() won\u0027t be called on all CPUs. This means the VP assist page\nwon\u0027t be reset. When the kexec kernel tries to setup the VP assist page\nagain, the hypervisor corrupts the memory region of the old VP assist page\ncausing a panic in case the kexec kernel is using that memory elsewhere.\nThis was originally fixed in commit dfe94d4086e4 (\"x86/hyperv: Fix kexec\npanic/hang issues\").\n\nGet rid of hyperv_init_cpuhp entirely since we are no longer using a\ndynamic cpuhp state and use CPUHP_AP_HYPERV_ONLINE directly with\ncpuhp_remove_state()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T20:38:01.854Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2ae1beb3ab4f28868cc5d1541d05e1fbee3ad825"
        },
        {
          "url": "https://git.kernel.org/stable/c/d6f018a3b49d0a94ddbd0e479c2af6b19724e434"
        },
        {
          "url": "https://git.kernel.org/stable/c/b9af6418279c4cf73ca073f8ea024992b38be8ab"
        }
      ],
      "title": "x86/hyperv: fix kexec crash due to VP assist page corruption",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-46864",
    "datePublished": "2024-09-27T12:42:52.994Z",
    "dateReserved": "2024-09-11T15:12:18.294Z",
    "dateUpdated": "2026-05-11T20:38:01.854Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.