FKIE_CVE-2021-47538

Vulnerability from fkie_nvd - Published: 2024-05-24 15:15 - Updated: 2026-06-17 04:17
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: rxrpc: Fix rxrpc_local leak in rxrpc_lookup_peer() Need to call rxrpc_put_local() for peer candidate before kfree() as it holds a ref to rxrpc_local. [DH: v2: Changed to abstract the peer freeing code out into a function]
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3e70e3a72d80b16094faccbe438cd53761c3503aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/60f0b9c42cb80833a03ca57c1c8b078d716e71d1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/913c24af2d13a3fd304462916ee98e298d56bdcePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9469273e616ca8f1b6e3773c5019f21b4c8d828cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/beacff50edbd6c9659a6f15fc7f6126909fade29Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/3e70e3a72d80b16094faccbe438cd53761c3503aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/60f0b9c42cb80833a03ca57c1c8b078d716e71d1Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/913c24af2d13a3fd304462916ee98e298d56bdcePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/9469273e616ca8f1b6e3773c5019f21b4c8d828cPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/beacff50edbd6c9659a6f15fc7f6126909fade29Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 5.4
linux linux_kernel 5.4
linux linux_kernel 5.4
linux linux_kernel 5.4
linux linux_kernel 5.4
linux linux_kernel 5.4
linux linux_kernel 5.16
linux linux_kernel 5.16
linux linux_kernel 5.16
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/rxrpc/peer_object.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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            },
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            },
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              "version": "5.3.9",
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          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "5.4"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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            },
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              "status": "unaffected",
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            },
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              "status": "unaffected",
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            },
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              "version": "5.15.7",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "5.16",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
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          "negate": false,
          "operator": "OR"
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      ]
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Fix rxrpc_local leak in rxrpc_lookup_peer()\n\nNeed to call rxrpc_put_local() for peer candidate before kfree() as it\nholds a ref to rxrpc_local.\n\n[DH: v2: Changed to abstract the peer freeing code out into a function]"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: rxrpc: corrigi\u00f3 la fuga de rxrpc_local en rxrpc_lookup_peer() Es necesario llamar a rxrpc_put_local() para el candidato par antes de kfree(), ya que contiene una referencia a rxrpc_local. [DH: v2: modificado para abstraer el c\u00f3digo de liberaci\u00f3n del par en una funci\u00f3n]"
    }
  ],
  "id": "CVE-2021-47538",
  "lastModified": "2026-06-17T04:17:43.160",
  "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"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-47538",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-05-24T19:15:07.366329Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-05-24T15:15:17.750",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/3e70e3a72d80b16094faccbe438cd53761c3503a"
    },
    {
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      "tags": [
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      "url": "https://git.kernel.org/stable/c/60f0b9c42cb80833a03ca57c1c8b078d716e71d1"
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    {
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      "tags": [
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      "url": "https://git.kernel.org/stable/c/beacff50edbd6c9659a6f15fc7f6126909fade29"
    },
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      "url": "https://git.kernel.org/stable/c/3e70e3a72d80b16094faccbe438cd53761c3503a"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
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    },
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      "url": "https://git.kernel.org/stable/c/913c24af2d13a3fd304462916ee98e298d56bdce"
    },
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    },
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      "url": "https://git.kernel.org/stable/c/beacff50edbd6c9659a6f15fc7f6126909fade29"
    }
  ],
  "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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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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