CVE-2021-47624 (GCVE-0-2021-47624)

Vulnerability from cvelistv5 – Published: 2024-07-16 11:29 – Updated: 2026-05-11 13:58
VLAI
Title
net/sunrpc: fix reference count leaks in rpc_sysfs_xprt_state_change
Summary
In the Linux kernel, the following vulnerability has been resolved: net/sunrpc: fix reference count leaks in rpc_sysfs_xprt_state_change The refcount leak issues take place in an error handling path. When the 3rd argument buf doesn't match with "offline", "online" or "remove", the function simply returns -EINVAL and forgets to decrease the reference count of a rpc_xprt object and a rpc_xprt_switch object increased by rpc_sysfs_xprt_kobj_get_xprt() and rpc_sysfs_xprt_kobj_get_xprt_switch(), causing reference count leaks of both unused objects. Fix this issue by jumping to the error handling path labelled with out_put when buf matches none of "offline", "online" or "remove".
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 16:59 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 5b7eb78486cd9ac58bfbd6d84ea0fe2d9fead03b , < 4b22aa42bd4d2d630ef1854c139275c3532937cb (git)
Affected: 5b7eb78486cd9ac58bfbd6d84ea0fe2d9fead03b , < 5f6024c05a2c0fdd180b29395aaf686d25af3a0f (git)
Affected: 5b7eb78486cd9ac58bfbd6d84ea0fe2d9fead03b , < 776d794f28c95051bc70405a7b1fa40115658a18 (git)
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Linux Linux Affected: 5.14
Unaffected: 0 , < 5.14 (semver)
Unaffected: 5.15.24 , ≤ 5.15.* (semver)
Unaffected: 5.16.10 , ≤ 5.16.* (semver)
Unaffected: 5.17 , ≤ * (original_commit_for_fix)
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              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sunrpc: fix reference count leaks in rpc_sysfs_xprt_state_change\n\nThe refcount leak issues take place in an error handling path. When the\n3rd argument buf doesn\u0027t match with \"offline\", \"online\" or \"remove\", the\nfunction simply returns -EINVAL and forgets to decrease the reference\ncount of a rpc_xprt object and a rpc_xprt_switch object increased by\nrpc_sysfs_xprt_kobj_get_xprt() and\nrpc_sysfs_xprt_kobj_get_xprt_switch(), causing reference count leaks of\nboth unused objects.\n\nFix this issue by jumping to the error handling path labelled with\nout_put when buf matches none of \"offline\", \"online\" or \"remove\"."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-05-21T08:31:53.173Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/4b22aa42bd4d2d630ef1854c139275c3532937cb"
            },
            {
              "url": "https://git.kernel.org/stable/c/5f6024c05a2c0fdd180b29395aaf686d25af3a0f"
            },
            {
              "url": "https://git.kernel.org/stable/c/776d794f28c95051bc70405a7b1fa40115658a18"
            }
          ],
          "title": "net/sunrpc: fix reference count leaks in rpc_sysfs_xprt_state_change",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2021-47624",
        "datePublished": "2024-07-16T11:29:39.903Z",
        "dateReserved": "2024-07-16T11:26:52.956Z",
        "dateUpdated": "2025-05-21T08:31:53.173Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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