CVE-2021-47306 (GCVE-0-2021-47306)

Vulnerability from cvelistv5 – Published: 2024-05-21 14:35 – Updated: 2026-05-11 13:51
VLAI
Title
net: fddi: fix UAF in fza_probe
Summary
In the Linux kernel, the following vulnerability has been resolved: net: fddi: fix UAF in fza_probe fp is netdev private data and it cannot be used after free_netdev() call. Using fp after free_netdev() can cause UAF bug. Fix it by moving free_netdev() after error message. TURBOchannel adapter")
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-05-28 15:52 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6637 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 61414f5ec9834df8aa4f55c90de16b71a3d6ca8d , < 04b06716838bfc26742dbed3ae1d3697fe5317ee (git)
Affected: 61414f5ec9834df8aa4f55c90de16b71a3d6ca8d , < f33605908a9b6063525e9f68e62d739948c5fccf (git)
Affected: 61414f5ec9834df8aa4f55c90de16b71a3d6ca8d , < bdfbb51f7a437ae8ea91317a5c133ec13adf3c47 (git)
Affected: 61414f5ec9834df8aa4f55c90de16b71a3d6ca8d , < deb7178eb940e2c5caca1b1db084a69b2e59b4c9 (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.20
Unaffected: 0 , < 4.20 (semver)
Unaffected: 5.4.135 , ≤ 5.4.* (semver)
Unaffected: 5.10.53 , ≤ 5.10.* (semver)
Unaffected: 5.13.5 , ≤ 5.13.* (semver)
Unaffected: 5.14 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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              "programFiles": [
                "drivers/net/fddi/defza.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "4.20"
                },
                {
                  "lessThan": "4.20",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.4.*",
                  "status": "unaffected",
                  "version": "5.4.135",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.10.*",
                  "status": "unaffected",
                  "version": "5.10.53",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.13.*",
                  "status": "unaffected",
                  "version": "5.13.5",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "5.14",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fddi: fix UAF in fza_probe\n\nfp is netdev private data and it cannot be\nused after free_netdev() call. Using fp after free_netdev()\ncan cause UAF bug. Fix it by moving free_netdev() after error message.\n\nTURBOchannel adapter\")"
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2024-12-19T07:39:23.760Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/04b06716838bfc26742dbed3ae1d3697fe5317ee"
            },
            {
              "url": "https://git.kernel.org/stable/c/f33605908a9b6063525e9f68e62d739948c5fccf"
            },
            {
              "url": "https://git.kernel.org/stable/c/bdfbb51f7a437ae8ea91317a5c133ec13adf3c47"
            },
            {
              "url": "https://git.kernel.org/stable/c/deb7178eb940e2c5caca1b1db084a69b2e59b4c9"
            }
          ],
          "title": "net: fddi: fix UAF in fza_probe",
          "x_generator": {
            "engine": "bippy-5f407fcff5a0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2021-47306",
        "datePublished": "2024-05-21T14:35:26.005Z",
        "dateReserved": "2024-05-21T13:27:52.133Z",
        "dateUpdated": "2024-12-19T07:39:23.760Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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