fkie_cve-2024-53113
Vulnerability from fkie_nvd
Published
2024-12-02 14:15
Modified
2024-12-14 21:15
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: mm: fix NULL pointer dereference in alloc_pages_bulk_noprof We triggered a NULL pointer dereference for ac.preferred_zoneref->zone in alloc_pages_bulk_noprof() when the task is migrated between cpusets. When cpuset is enabled, in prepare_alloc_pages(), ac->nodemask may be &current->mems_allowed. when first_zones_zonelist() is called to find preferred_zoneref, the ac->nodemask may be modified concurrently if the task is migrated between different cpusets. Assuming we have 2 NUMA Node, when traversing Node1 in ac->zonelist, the nodemask is 2, and when traversing Node2 in ac->zonelist, the nodemask is 1. As a result, the ac->preferred_zoneref points to NULL zone. In alloc_pages_bulk_noprof(), for_each_zone_zonelist_nodemask() finds a allowable zone and calls zonelist_node_idx(ac.preferred_zoneref), leading to NULL pointer dereference. __alloc_pages_noprof() fixes this issue by checking NULL pointer in commit ea57485af8f4 ("mm, page_alloc: fix check for NULL preferred_zone") and commit df76cee6bbeb ("mm, page_alloc: remove redundant checks from alloc fastpath"). To fix it, check NULL pointer for preferred_zoneref->zone.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/31502374627ba9ec3e710dbd0bb00457cc6d2c19Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6addb2d9501ec866d7b3a3b4e665307c437e9be2Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8ce41b0f9d77cca074df25afd39b86e2ee3aa68ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/903d896448c2e50e8652aaba529a30d4d1eaa0e5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d0f16cec79774c3132df006cf771eddd89d08f58Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.12
linux linux_kernel 6.12
linux linux_kernel 6.12
linux linux_kernel 6.12
linux linux_kernel 6.12
linux linux_kernel 6.12
linux linux_kernel 6.12


To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm: fix NULL pointer dereference in alloc_pages_bulk_noprof\n\nWe triggered a NULL pointer dereference for ac.preferred_zoneref-\u003ezone in\nalloc_pages_bulk_noprof() when the task is migrated between cpusets.\n\nWhen cpuset is enabled, in prepare_alloc_pages(), ac-\u003enodemask may be\n\u0026current-\u003emems_allowed.  when first_zones_zonelist() is called to find\npreferred_zoneref, the ac-\u003enodemask may be modified concurrently if the\ntask is migrated between different cpusets.  Assuming we have 2 NUMA Node,\nwhen traversing Node1 in ac-\u003ezonelist, the nodemask is 2, and when\ntraversing Node2 in ac-\u003ezonelist, the nodemask is 1.  As a result, the\nac-\u003epreferred_zoneref points to NULL zone.\n\nIn alloc_pages_bulk_noprof(), for_each_zone_zonelist_nodemask() finds a\nallowable zone and calls zonelist_node_idx(ac.preferred_zoneref), leading\nto NULL pointer dereference.\n\n__alloc_pages_noprof() fixes this issue by checking NULL pointer in commit\nea57485af8f4 (\"mm, page_alloc: fix check for NULL preferred_zone\") and\ncommit df76cee6bbeb (\"mm, page_alloc: remove redundant checks from alloc\nfastpath\").\n\nTo fix it, check NULL pointer for preferred_zoneref-\u003ezone."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mm: corregir la desreferencia de puntero NULL en alloc_pages_bulk_noprof Activamos una desreferencia de puntero NULL para ac.preferred_zoneref-\u0026gt;zone en alloc_pages_bulk_noprof() cuando la tarea se migra entre conjuntos de CPU. Cuando se habilita el conjunto de CPU, en prepare_alloc_pages(), ac-\u0026gt;nodemask puede ser \u0026amp;current-\u0026gt;mems_allowed. Cuando se llama a first_zones_zonelist() para encontrar preference_zoneref, ac-\u0026gt;nodemask puede modificarse simult\u00e1neamente si la tarea se migra entre diferentes conjuntos de CPU. Suponiendo que tenemos 2 nodos NUMA, al recorrer el nodo 1 en ac-\u0026gt;zonelist, la m\u00e1scara de nodo es 2, y al recorrer el nodo 2 en ac-\u0026gt;zonelist, la m\u00e1scara de nodo es 1. Como resultado, ac-\u0026gt;preferred_zoneref apunta a la zona NULL. En alloc_pages_bulk_noprof(), for_each_zone_zonelist_nodemask() encuentra una zona permitida y llama a zonelist_node_idx(ac.preferred_zoneref), lo que genera una desreferencia del puntero NULL. __alloc_pages_noprof() corrige este problema al verificar el puntero NULL en el commit ea57485af8f4 (\"mm, page_alloc: corregir la verificaci\u00f3n para la zona preferida NULL\") y el commit df76cee6bbeb (\"mm, page_alloc: eliminar las verificaciones redundantes de la ruta r\u00e1pida de asignaci\u00f3n\"). Para solucionarlo, verifique el puntero NULL para la zona preferida-\u0026gt;zone."
    }
  ],
  "id": "CVE-2024-53113",
  "lastModified": "2024-12-14T21:15:35.550",
  "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": "2024-12-02T14:15:12.097",
  "references": [
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      "tags": [
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  "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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  ]
}


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