FKIE_CVE-2022-48821

Vulnerability from fkie_nvd - Published: 2024-07-16 12:15 - Updated: 2026-08-04 10:17
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: misc: fastrpc: avoid double fput() on failed usercopy If the copy back to userland fails for the FASTRPC_IOCTL_ALLOC_DMA_BUFF ioctl(), we shouldn't assume that 'buf->dmabuf' is still valid. In fact, dma_buf_fd() called fd_install() before, i.e. "consumed" one reference, leaving us with none. Calling dma_buf_put() will therefore put a reference we no longer own, leading to a valid file descritor table entry for an already released 'file' object which is a straight use-after-free. Simply avoid calling dma_buf_put() and rely on the process exit code to do the necessary cleanup, if needed, i.e. if the file descriptor is still valid.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/46963e2e0629cb31c96b1d47ddd89dc3d8990b34Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4e6fd2b5fcf8e7119305a6042bd92e7f2b9ed215Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/76f85c307ef9f10aa2cef1b1d5ee654c1f3345fcPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a5ce7ee5fcc07583159f54ab4af5164de00148f5Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e4382d0a39f9a1e260d62fdc079ddae5293c037dPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/46963e2e0629cb31c96b1d47ddd89dc3d8990b34Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/4e6fd2b5fcf8e7119305a6042bd92e7f2b9ed215Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/76f85c307ef9f10aa2cef1b1d5ee654c1f3345fcPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/a5ce7ee5fcc07583159f54ab4af5164de00148f5Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/e4382d0a39f9a1e260d62fdc079ddae5293c037dPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 5.17
linux linux_kernel 5.17
linux linux_kernel 5.17
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/misc/fastrpc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4e6fd2b5fcf8e7119305a6042bd92e7f2b9ed215",
              "status": "affected",
              "version": "6cffd79504ce040f460831030d3069fa1c99bb71",
              "versionType": "git"
            },
            {
              "lessThan": "a5ce7ee5fcc07583159f54ab4af5164de00148f5",
              "status": "affected",
              "version": "6cffd79504ce040f460831030d3069fa1c99bb71",
              "versionType": "git"
            },
            {
              "lessThan": "e4382d0a39f9a1e260d62fdc079ddae5293c037d",
              "status": "affected",
              "version": "6cffd79504ce040f460831030d3069fa1c99bb71",
              "versionType": "git"
            },
            {
              "lessThan": "76f85c307ef9f10aa2cef1b1d5ee654c1f3345fc",
              "status": "affected",
              "version": "6cffd79504ce040f460831030d3069fa1c99bb71",
              "versionType": "git"
            },
            {
              "lessThan": "46963e2e0629cb31c96b1d47ddd89dc3d8990b34",
              "status": "affected",
              "version": "6cffd79504ce040f460831030d3069fa1c99bb71",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/misc/fastrpc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.1"
            },
            {
              "lessThan": "5.1",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.180",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.24",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.16.*",
              "status": "unaffected",
              "version": "5.16.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.17",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "CDDF7C0A-34BC-4EE5-972C-04626CA8CFF2",
              "versionEndExcluding": "5.4.180",
              "versionStartIncluding": "5.1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "A154171E-A3B9-42BE-9E97-C9B0EA43FC54",
              "versionEndExcluding": "5.10.101",
              "versionStartIncluding": "5.5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "866451F0-299E-416C-B0B8-AE6B33E62CCA",
              "versionEndExcluding": "5.15.24",
              "versionStartIncluding": "5.11",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "679523BA-1392-404B-AB85-F5A5408B1ECC",
              "versionEndExcluding": "5.16.10",
              "versionStartIncluding": "5.16",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.17:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "7BD5F8D9-54FA-4CB0-B4F0-CB0471FDDB2D",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.17:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "E6E34B23-78B4-4516-9BD8-61B33F4AC49A",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.17:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "C030FA3D-03F4-4FB9-9DBF-D08E5CAC51AA",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: fastrpc: avoid double fput() on failed usercopy\n\nIf the copy back to userland fails for the FASTRPC_IOCTL_ALLOC_DMA_BUFF\nioctl(), we shouldn\u0027t assume that \u0027buf-\u003edmabuf\u0027 is still valid. In fact,\ndma_buf_fd() called fd_install() before, i.e. \"consumed\" one reference,\nleaving us with none.\n\nCalling dma_buf_put() will therefore put a reference we no longer own,\nleading to a valid file descritor table entry for an already released\n\u0027file\u0027 object which is a straight use-after-free.\n\nSimply avoid calling dma_buf_put() and rely on the process exit code to\ndo the necessary cleanup, if needed, i.e. if the file descriptor is\nstill valid."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: misc: fastrpc: evitar doble fput() en copia de usuario fallida. Si la copia al \u00e1rea de usuario falla para FASTRPC_IOCTL_ALLOC_DMA_BUFF ioctl(), no debemos asumir que \u0027buf-\u0026gt;dmabuf\u0027 aun es v\u00e1lido. De hecho, dma_buf_fd() llam\u00f3 a fd_install() antes, es decir, \"consumi\u00f3\" una referencia, dej\u00e1ndonos sin ninguna. Por lo tanto, llamar a dma_buf_put() colocar\u00e1 una referencia que ya no poseemos, lo que conducir\u00e1 a una entrada v\u00e1lida en la tabla de descripci\u00f3n de archivos para un objeto \u0027archivo\u0027 ya publicado que es un use-after-free directo. Simplemente evite llamar a dma_buf_put() y conf\u00ede en el c\u00f3digo de salida del proceso para realizar la limpieza necesaria, si es necesario, es decir, si el descriptor del archivo a\u00fan es v\u00e1lido."
    }
  ],
  "id": "CVE-2022-48821",
  "lastModified": "2026-08-04T10:17:22.740",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2022-48821",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-09-10T16:57:59.542299Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-07-16T12:15:06.010",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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      "url": "https://git.kernel.org/stable/c/46963e2e0629cb31c96b1d47ddd89dc3d8990b34"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
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    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        "Patch"
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      "url": "https://git.kernel.org/stable/c/a5ce7ee5fcc07583159f54ab4af5164de00148f5"
    },
    {
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      "tags": [
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    },
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    },
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      "tags": [
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      "url": "https://git.kernel.org/stable/c/4e6fd2b5fcf8e7119305a6042bd92e7f2b9ed215"
    },
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      "tags": [
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      ],
      "url": "https://git.kernel.org/stable/c/76f85c307ef9f10aa2cef1b1d5ee654c1f3345fc"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/a5ce7ee5fcc07583159f54ab4af5164de00148f5"
    },
    {
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      "url": "https://git.kernel.org/stable/c/e4382d0a39f9a1e260d62fdc079ddae5293c037d"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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