FKIE_CVE-2024-43819

Vulnerability from fkie_nvd - Published: 2024-08-17 10:15 - Updated: 2026-10-21 13:17
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: kvm: s390: Reject memory region operations for ucontrol VMs This change rejects the KVM_SET_USER_MEMORY_REGION and KVM_SET_USER_MEMORY_REGION2 ioctls when called on a ucontrol VM. This is necessary since ucontrol VMs have kvm->arch.gmap set to 0 and would thus result in a null pointer dereference further in. Memory management needs to be performed in userspace and using the ioctls KVM_S390_UCAS_MAP and KVM_S390_UCAS_UNMAP. Also improve s390 specific documentation for KVM_SET_USER_MEMORY_REGION and KVM_SET_USER_MEMORY_REGION2. [frankja@linux.ibm.com: commit message spelling fix, subject prefix fix]
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/49c9945c054df4c22008e2bf87ca74d3e2507aa6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/705a8b8cc5a44b206096abb1bfdc8bc43b3c75c7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7816e58967d0e6cadce05c8540b47ed027dc2499Patch
Impacted products
Vendor Product Version
linux linux_kernel *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "Documentation/virt/kvm/api.rst",
            "arch/s390/kvm/kvm-s390.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "705a8b8cc5a44b206096abb1bfdc8bc43b3c75c7",
              "status": "affected",
              "version": "27e0393f15fc8bc855c6a888387ff5ffd2181089",
              "versionType": "git"
            },
            {
              "lessThan": "49c9945c054df4c22008e2bf87ca74d3e2507aa6",
              "status": "affected",
              "version": "27e0393f15fc8bc855c6a888387ff5ffd2181089",
              "versionType": "git"
            },
            {
              "lessThan": "7816e58967d0e6cadce05c8540b47ed027dc2499",
              "status": "affected",
              "version": "27e0393f15fc8bc855c6a888387ff5ffd2181089",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "Documentation/virt/kvm/api.rst",
            "arch/s390/kvm/kvm-s390.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.4"
            },
            {
              "lessThan": "3.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.10.*",
              "status": "unaffected",
              "version": "6.10.3",
              "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": "A3F509B5-4B2B-4A2A-9B3A-C27FEED3AFAE",
              "versionEndExcluding": "6.10.3",
              "versionStartIncluding": "3.4",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nkvm: s390: Reject memory region operations for ucontrol VMs\n\nThis change rejects the KVM_SET_USER_MEMORY_REGION and\nKVM_SET_USER_MEMORY_REGION2 ioctls when called on a ucontrol VM.\nThis is necessary since ucontrol VMs have kvm-\u003earch.gmap set to 0 and\nwould thus result in a null pointer dereference further in.\nMemory management needs to be performed in userspace and using the\nioctls KVM_S390_UCAS_MAP and KVM_S390_UCAS_UNMAP.\n\nAlso improve s390 specific documentation for KVM_SET_USER_MEMORY_REGION\nand KVM_SET_USER_MEMORY_REGION2.\n\n[frankja@linux.ibm.com: commit message spelling fix, subject prefix fix]"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: kvm: s390: Rechazar operaciones de regi\u00f3n de memoria para VM de ucontrol Este cambio rechaza los ioctls KVM_SET_USER_MEMORY_REGION y KVM_SET_USER_MEMORY_REGION2 cuando se llama en una VM de ucontrol. Esto es necesario ya que las m\u00e1quinas virtuales ucontrol tienen kvm-\u0026gt;arch.gmap establecido en 0 y, por lo tanto, dar\u00eda como resultado una desreferencia de puntero nulo m\u00e1s adelante. La administraci\u00f3n de la memoria debe realizarse en el espacio de usuario y utilizando los ioctls KVM_S390_UCAS_MAP y KVM_S390_UCAS_UNMAP. Mejore tambi\u00e9n la documentaci\u00f3n espec\u00edfica de s390 para KVM_SET_USER_MEMORY_REGION y KVM_SET_USER_MEMORY_REGION2. [frankja@linux.ibm.com: confirmaci\u00f3n de correcci\u00f3n ortogr\u00e1fica del mensaje, correcci\u00f3n del prefijo del asunto]"
    }
  ],
  "id": "CVE-2024-43819",
  "lastModified": "2026-10-21T13:17:46.910",
  "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-2024-43819",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-09-10T16:09:06.730085Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-08-17T10:15:08.147",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/49c9945c054df4c22008e2bf87ca74d3e2507aa6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/705a8b8cc5a44b206096abb1bfdc8bc43b3c75c7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/7816e58967d0e6cadce05c8540b47ed027dc2499"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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