fkie_cve-2022-48714
Vulnerability from fkie_nvd
Published
2024-06-20 11:15
Modified
2025-09-17 17:12
Severity ?
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Use VM_MAP instead of VM_ALLOC for ringbuf After commit 2fd3fb0be1d1 ("kasan, vmalloc: unpoison VM_ALLOC pages after mapping"), non-VM_ALLOC mappings will be marked as accessible in __get_vm_area_node() when KASAN is enabled. But now the flag for ringbuf area is VM_ALLOC, so KASAN will complain out-of-bound access after vmap() returns. Because the ringbuf area is created by mapping allocated pages, so use VM_MAP instead. After the change, info in /proc/vmallocinfo also changes from [start]-[end] 24576 ringbuf_map_alloc+0x171/0x290 vmalloc user to [start]-[end] 24576 ringbuf_map_alloc+0x171/0x290 vmap user
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5e457aeab52a5947619e1f18047f4d2f3212b3ebPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6304a613a97d6dcd49b93fbad31e9f39d1e138d6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b293dcc473d22a62dc6d78de2b15e4f49515db56Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d578933f6226d5419af9306746efa1c693cbaf9cPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/5e457aeab52a5947619e1f18047f4d2f3212b3ebPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/6304a613a97d6dcd49b93fbad31e9f39d1e138d6Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b293dcc473d22a62dc6d78de2b15e4f49515db56Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d578933f6226d5419af9306746efa1c693cbaf9cPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 5.17
linux linux_kernel 5.17


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "539F713A-F940-4698-BC87-245228B4AB3D",
              "versionEndExcluding": "5.10.99",
              "versionStartIncluding": "5.8",
              "vulnerable": true
            },
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              "versionEndExcluding": "5.15.22",
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              "versionEndExcluding": "5.16.8",
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            {
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              "vulnerable": true
            },
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              "criteria": "cpe:2.3:o:linux:linux_kernel:5.17:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "E6E34B23-78B4-4516-9BD8-61B33F4AC49A",
              "vulnerable": true
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          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Use VM_MAP instead of VM_ALLOC for ringbuf\n\nAfter commit 2fd3fb0be1d1 (\"kasan, vmalloc: unpoison VM_ALLOC pages\nafter mapping\"), non-VM_ALLOC mappings will be marked as accessible\nin __get_vm_area_node() when KASAN is enabled. But now the flag for\nringbuf area is VM_ALLOC, so KASAN will complain out-of-bound access\nafter vmap() returns. Because the ringbuf area is created by mapping\nallocated pages, so use VM_MAP instead.\n\nAfter the change, info in /proc/vmallocinfo also changes from\n  [start]-[end]   24576 ringbuf_map_alloc+0x171/0x290 vmalloc user\nto\n  [start]-[end]   24576 ringbuf_map_alloc+0x171/0x290 vmap user"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: bpf: use VM_MAP en lugar de VM_ALLOC para ringbuf Despu\u00e9s del commit 2fd3fb0be1d1 (\"kasan, vmalloc: despoisone las p\u00e1ginas VM_ALLOC despu\u00e9s del mapeo\"), los mapeos que no sean VM_ALLOC se marcar\u00e1n como accesibles en __get_vm_area_node( ) cuando KASAN est\u00e1 habilitado. Pero ahora el indicador para el \u00e1rea ringbuf es VM_ALLOC, por lo que KASAN se quejar\u00e1 del acceso fuera de los l\u00edmites despu\u00e9s de que regrese vmap(). Debido a que el \u00e1rea ringbuf se crea asignando p\u00e1ginas asignadas, use VM_MAP en su lugar. Despu\u00e9s del cambio, la informaci\u00f3n en /proc/vmallocinfo tambi\u00e9n cambia de [inicio]-[fin] 24576 ringbuf_map_alloc+0x171/0x290 usuario vmalloc a [inicio]-[fin] 24576 ringbuf_map_alloc+0x171/0x290 usuario vmap"
    }
  ],
  "id": "CVE-2022-48714",
  "lastModified": "2025-09-17T17:12:54.117",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.2,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-06-20T11:15:55.033",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/5e457aeab52a5947619e1f18047f4d2f3212b3eb"
    },
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/b293dcc473d22a62dc6d78de2b15e4f49515db56"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/d578933f6226d5419af9306746efa1c693cbaf9c"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
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      "url": "https://git.kernel.org/stable/c/5e457aeab52a5947619e1f18047f4d2f3212b3eb"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
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      "url": "https://git.kernel.org/stable/c/6304a613a97d6dcd49b93fbad31e9f39d1e138d6"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/b293dcc473d22a62dc6d78de2b15e4f49515db56"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
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      "url": "https://git.kernel.org/stable/c/d578933f6226d5419af9306746efa1c693cbaf9c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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