fkie_cve-2021-46956
Vulnerability from fkie_nvd
Published
2024-02-27 19:04
Modified
2024-12-06 17:54
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: virtiofs: fix memory leak in virtio_fs_probe() When accidentally passing twice the same tag to qemu, kmemleak ended up reporting a memory leak in virtiofs. Also, looking at the log I saw the following error (that's when I realised the duplicated tag): virtiofs: probe of virtio5 failed with error -17 Here's the kmemleak log for reference: unreferenced object 0xffff888103d47800 (size 1024): comm "systemd-udevd", pid 118, jiffies 4294893780 (age 18.340s) hex dump (first 32 bytes): 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00 .....N.......... ff ff ff ff ff ff ff ff 80 90 02 a0 ff ff ff ff ................ backtrace: [<000000000ebb87c1>] virtio_fs_probe+0x171/0x7ae [virtiofs] [<00000000f8aca419>] virtio_dev_probe+0x15f/0x210 [<000000004d6baf3c>] really_probe+0xea/0x430 [<00000000a6ceeac8>] device_driver_attach+0xa8/0xb0 [<00000000196f47a7>] __driver_attach+0x98/0x140 [<000000000b20601d>] bus_for_each_dev+0x7b/0xc0 [<00000000399c7b7f>] bus_add_driver+0x11b/0x1f0 [<0000000032b09ba7>] driver_register+0x8f/0xe0 [<00000000cdd55998>] 0xffffffffa002c013 [<000000000ea196a2>] do_one_initcall+0x64/0x2e0 [<0000000008f727ce>] do_init_module+0x5c/0x260 [<000000003cdedab6>] __do_sys_finit_module+0xb5/0x120 [<00000000ad2f48c6>] do_syscall_64+0x33/0x40 [<00000000809526b5>] entry_SYSCALL_64_after_hwframe+0x44/0xae
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/310efc95c72c13faf855c692d19cd4d054d827c8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5116e79fc6e6725b8acdad8b7e928a83ab7b47e6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9b9d60c0eb8ada99cce2a9ab5c15dffc523b01aePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c79c5e0178922a9e092ec8fed026750f39dcaef4Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d19555ff225d0896a33246a49279e6d578095f15Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/310efc95c72c13faf855c692d19cd4d054d827c8Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/5116e79fc6e6725b8acdad8b7e928a83ab7b47e6Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/9b9d60c0eb8ada99cce2a9ab5c15dffc523b01aePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c79c5e0178922a9e092ec8fed026750f39dcaef4Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d19555ff225d0896a33246a49279e6d578095f15Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "45C90F78-15A8-452F-AA7D-00A762FDEFE7",
              "versionEndExcluding": "5.4.118",
              "versionStartIncluding": "5.4",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "003E22D0-CA29-4338-8B35-0754C740074F",
              "versionEndExcluding": "5.10.36",
              "versionStartIncluding": "5.5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "EEC03413-9760-46D4-AC1D-EB084A1D4111",
              "versionEndExcluding": "5.11.20",
              "versionStartIncluding": "5.11",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F9D6B2DE-7E4A-4B3B-9AEE-3A2C5F23DA32",
              "versionEndExcluding": "5.12.3",
              "versionStartIncluding": "5.12",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvirtiofs: fix memory leak in virtio_fs_probe()\n\nWhen accidentally passing twice the same tag to qemu, kmemleak ended up\nreporting a memory leak in virtiofs.  Also, looking at the log I saw the\nfollowing error (that\u0027s when I realised the duplicated tag):\n\n  virtiofs: probe of virtio5 failed with error -17\n\nHere\u0027s the kmemleak log for reference:\n\nunreferenced object 0xffff888103d47800 (size 1024):\n  comm \"systemd-udevd\", pid 118, jiffies 4294893780 (age 18.340s)\n  hex dump (first 32 bytes):\n    00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........\n    ff ff ff ff ff ff ff ff 80 90 02 a0 ff ff ff ff  ................\n  backtrace:\n    [\u003c000000000ebb87c1\u003e] virtio_fs_probe+0x171/0x7ae [virtiofs]\n    [\u003c00000000f8aca419\u003e] virtio_dev_probe+0x15f/0x210\n    [\u003c000000004d6baf3c\u003e] really_probe+0xea/0x430\n    [\u003c00000000a6ceeac8\u003e] device_driver_attach+0xa8/0xb0\n    [\u003c00000000196f47a7\u003e] __driver_attach+0x98/0x140\n    [\u003c000000000b20601d\u003e] bus_for_each_dev+0x7b/0xc0\n    [\u003c00000000399c7b7f\u003e] bus_add_driver+0x11b/0x1f0\n    [\u003c0000000032b09ba7\u003e] driver_register+0x8f/0xe0\n    [\u003c00000000cdd55998\u003e] 0xffffffffa002c013\n    [\u003c000000000ea196a2\u003e] do_one_initcall+0x64/0x2e0\n    [\u003c0000000008f727ce\u003e] do_init_module+0x5c/0x260\n    [\u003c000000003cdedab6\u003e] __do_sys_finit_module+0xb5/0x120\n    [\u003c00000000ad2f48c6\u003e] do_syscall_64+0x33/0x40\n    [\u003c00000000809526b5\u003e] entry_SYSCALL_64_after_hwframe+0x44/0xae"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: virtiofs: corrige p\u00e9rdida de memoria en virtio_fs_probe() Al pasar accidentalmente dos veces la misma etiqueta a qemu, kmemleak termin\u00f3 reportando una p\u00e9rdida de memoria en virtiofs. Adem\u00e1s, mirando el registro vi el siguiente error (fue entonces cuando me di cuenta de la etiqueta duplicada): virtiofs: la sonda de virtio5 fall\u00f3 con el error -17 Aqu\u00ed est\u00e1 el registro kmemleak como referencia: objeto sin referencia 0xffff888103d47800 (tama\u00f1o 1024): comm \"systemd- udevd\", pid 118, jiffies 4294893780 (edad 18.340 s) volcado hexadecimal (primeros 32 bytes): 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00 ......N....... ... ff ff ff ff ff ff ff ff 80 90 02 a0 ff ff ff ff ................ rastreo: [\u0026lt;000000000ebb87c1\u0026gt;] virtio_fs_probe+0x171/0x7ae [virtiofs] [\u0026lt;00000000f8aca419\u0026gt;] virtio_dev_probe+0x15f/0x210 [\u0026lt;000000004d6baf3c\u0026gt;] very_probe+0xea/0x430 [\u0026lt;00000000a6ceeac8\u0026gt;] device_driver_attach+0xa8/0xb0 [\u0026lt;00000000196f47a7 \u0026gt;] __driver_attach+0x98/0x140 [\u0026lt;000000000b20601d\u0026gt;] bus_for_each_dev+0x7b/0xc0 [\u0026lt;00000000399c7b7f\u0026gt;] bus_add_driver+0x11b/0x1f0 [\u0026lt;0000000032b09ba7\u0026gt;] driver_register+0x8f/0xe0 [\u0026lt;00000000cdd55998\u0026gt;] 0xffffffffa002c013 [\u0026lt;000000000ea196a2\u0026gt; ] do_one_initcall+0x64/0x2e0 [\u0026lt;0000000008f727ce\u0026gt;] do_init_module+0x5c/0x260 [\u0026lt;000000003cdedab6\u0026gt; ] __do_sys_finit_module+0xb5/0x120 [\u0026lt;00000000ad2f48c6\u0026gt;] do_syscall_64+0x33/0x40 [\u0026lt;00000000809526b5\u0026gt;] Entry_SYSCALL_64_after_hwframe+0x44/0xae "
    }
  ],
  "id": "CVE-2021-46956",
  "lastModified": "2024-12-06T17:54:34.117",
  "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": "2024-02-27T19:04:06.717",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/310efc95c72c13faf855c692d19cd4d054d827c8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/5116e79fc6e6725b8acdad8b7e928a83ab7b47e6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/9b9d60c0eb8ada99cce2a9ab5c15dffc523b01ae"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/c79c5e0178922a9e092ec8fed026750f39dcaef4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d19555ff225d0896a33246a49279e6d578095f15"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/310efc95c72c13faf855c692d19cd4d054d827c8"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/5116e79fc6e6725b8acdad8b7e928a83ab7b47e6"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/9b9d60c0eb8ada99cce2a9ab5c15dffc523b01ae"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/c79c5e0178922a9e092ec8fed026750f39dcaef4"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d19555ff225d0896a33246a49279e6d578095f15"
    }
  ],
  "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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