fkie_cve-2024-41021
Vulnerability from fkie_nvd
Published
2024-07-29 14:15
Modified
2025-09-25 20:05
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: s390/mm: Fix VM_FAULT_HWPOISON handling in do_exception() There is no support for HWPOISON, MEMORY_FAILURE, or ARCH_HAS_COPY_MC on s390. Therefore we do not expect to see VM_FAULT_HWPOISON in do_exception(). However, since commit af19487f00f3 ("mm: make PTE_MARKER_SWAPIN_ERROR more general"), it is possible to see VM_FAULT_HWPOISON in combination with PTE_MARKER_POISONED, even on architectures that do not support HWPOISON otherwise. In this case, we will end up on the BUG() in do_exception(). Fix this by treating VM_FAULT_HWPOISON the same as VM_FAULT_SIGBUS, similar to x86 when MEMORY_FAILURE is not configured. Also print unexpected fault flags, for easier debugging. Note that VM_FAULT_HWPOISON_LARGE is not expected, because s390 cannot support swap entries on other levels than PTE level.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/73a9260b7366d2906ec011e100319359fe2277d0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9e13767ccefdc4f8aa92514b592b60f6b54882ffPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a3aefb871222a9880602d1a44a558177b4143e3bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/df39038cd89525d465c2c8827eb64116873f141aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/9e13767ccefdc4f8aa92514b592b60f6b54882ffPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/a3aefb871222a9880602d1a44a558177b4143e3bPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/df39038cd89525d465c2c8827eb64116873f141aPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "747D9CE2-6239-4971-B807-38A8BC53C645",
              "versionEndExcluding": "6.6.44",
              "versionStartIncluding": "6.6",
              "vulnerable": true
            },
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              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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          "negate": false,
          "operator": "OR"
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/mm: Fix VM_FAULT_HWPOISON handling in do_exception()\n\nThere is no support for HWPOISON, MEMORY_FAILURE, or ARCH_HAS_COPY_MC on\ns390. Therefore we do not expect to see VM_FAULT_HWPOISON in\ndo_exception().\n\nHowever, since commit af19487f00f3 (\"mm: make PTE_MARKER_SWAPIN_ERROR more\ngeneral\"), it is possible to see VM_FAULT_HWPOISON in combination with\nPTE_MARKER_POISONED, even on architectures that do not support HWPOISON\notherwise. In this case, we will end up on the BUG() in do_exception().\n\nFix this by treating VM_FAULT_HWPOISON the same as VM_FAULT_SIGBUS, similar\nto x86 when MEMORY_FAILURE is not configured. Also print unexpected fault\nflags, for easier debugging.\n\nNote that VM_FAULT_HWPOISON_LARGE is not expected, because s390 cannot\nsupport swap entries on other levels than PTE level."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: s390/mm: corrija el manejo de VM_FAULT_HWPOISON en do_exception() No hay soporte para HWPOISON, MEMORY_FAILURE o ARCH_HAS_COPY_MC en s390. Por lo tanto, no esperamos ver VM_FAULT_HWPOISON en do_exception(). Sin embargo, desde la confirmaci\u00f3n af19487f00f3 (\"mm: hacer que PTE_MARKER_SWAPIN_ERROR sea m\u00e1s general\"), es posible ver VM_FAULT_HWPOISON en combinaci\u00f3n con PTE_MARKER_POISONED, incluso en arquitecturas que no admiten HWPOISON de otra manera. En este caso, terminaremos en el ERROR() en do_exception(). Solucione este problema tratando VM_FAULT_HWPOISON de la misma manera que VM_FAULT_SIGBUS, similar a x86 cuando MEMORY_FAILURE no est\u00e1 configurado. Tambi\u00e9n imprima indicadores defallos inesperadas para facilitar la depuraci\u00f3n. Tenga en cuenta que no se espera VM_FAULT_HWPOISON_LARGE, porque s390 no puede admitir entradas de intercambio en otros niveles que no sean el nivel PTE."
    }
  ],
  "id": "CVE-2024-41021",
  "lastModified": "2025-09-25T20:05:50.930",
  "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": "2024-07-29T14:15:03.870",
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    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/9e13767ccefdc4f8aa92514b592b60f6b54882ff"
    },
    {
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    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
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      "url": "https://git.kernel.org/stable/c/df39038cd89525d465c2c8827eb64116873f141a"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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