CVE-2021-47203 (GCVE-0-2021-47203)

Vulnerability from cvelistv5 – Published: 2024-04-10 18:56 – Updated: 2026-08-05 08:46
VLAI
Title
scsi: lpfc: Fix list_add() corruption in lpfc_drain_txq()
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: lpfc: Fix list_add() corruption in lpfc_drain_txq() When parsing the txq list in lpfc_drain_txq(), the driver attempts to pass the requests to the adapter. If such an attempt fails, a local "fail_msg" string is set and a log message output. The job is then added to a completions list for cancellation. Processing of any further jobs from the txq list continues, but since "fail_msg" remains set, jobs are added to the completions list regardless of whether a wqe was passed to the adapter. If successfully added to txcmplq, jobs are added to both lists resulting in list corruption. Fix by clearing the fail_msg string after adding a job to the completions list. This stops the subsequent jobs from being added to the completions list unless they had an appropriate failure.
Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-04-10 19:44 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 2a9bf3d011303d8da64cd5e0e7fdd95f0c143984 , < ad4776b5eb2e58af1226847fcd3b4f6d051674dd (git)
Affected: 2a9bf3d011303d8da64cd5e0e7fdd95f0c143984 , < ec70d80a8642900086447ba0cdc79e3f44d42e8f (git)
Affected: 2a9bf3d011303d8da64cd5e0e7fdd95f0c143984 , < f05a0191b90156e539cccc189b9d87ca2a4d9305 (git)
Affected: 2a9bf3d011303d8da64cd5e0e7fdd95f0c143984 , < b291d147d0268e93ad866f8bc820ea14497abc9b (git)
Affected: 2a9bf3d011303d8da64cd5e0e7fdd95f0c143984 , < 16bcbfb56d759c25665f786e33ec633b9508a08f (git)
Affected: 2a9bf3d011303d8da64cd5e0e7fdd95f0c143984 , < c097bd5a59162156d9c2077a2f58732ffbaa9fca (git)
Affected: 2a9bf3d011303d8da64cd5e0e7fdd95f0c143984 , < 814d3610c4ce86e8cf285b2cdac0057a42e82de5 (git)
Affected: 2a9bf3d011303d8da64cd5e0e7fdd95f0c143984 , < 99154581b05c8fb22607afb7c3d66c1bace6aa5d (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.36
Unaffected: 0 , < 2.6.36 (semver)
Unaffected: 4.4.293 , ≤ 4.4.* (semver)
Unaffected: 4.9.291 , ≤ 4.9.* (semver)
Unaffected: 4.14.256 , ≤ 4.14.* (semver)
Unaffected: 4.19.218 , ≤ 4.19.* (semver)
Unaffected: 5.4.162 , ≤ 5.4.* (semver)
Unaffected: 5.10.82 , ≤ 5.10.* (semver)
Unaffected: 5.15.5 , ≤ 5.15.* (semver)
Unaffected: 5.16 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-47203",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-04-10T19:44:44.009129Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-06-04T17:14:01.015Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T05:32:07.414Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/ad4776b5eb2e58af1226847fcd3b4f6d051674dd"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/ec70d80a8642900086447ba0cdc79e3f44d42e8f"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/f05a0191b90156e539cccc189b9d87ca2a4d9305"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/b291d147d0268e93ad866f8bc820ea14497abc9b"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/16bcbfb56d759c25665f786e33ec633b9508a08f"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/c097bd5a59162156d9c2077a2f58732ffbaa9fca"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/814d3610c4ce86e8cf285b2cdac0057a42e82de5"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/99154581b05c8fb22607afb7c3d66c1bace6aa5d"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/scsi/lpfc/lpfc_sli.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ad4776b5eb2e58af1226847fcd3b4f6d051674dd",
              "status": "affected",
              "version": "2a9bf3d011303d8da64cd5e0e7fdd95f0c143984",
              "versionType": "git"
            },
            {
              "lessThan": "ec70d80a8642900086447ba0cdc79e3f44d42e8f",
              "status": "affected",
              "version": "2a9bf3d011303d8da64cd5e0e7fdd95f0c143984",
              "versionType": "git"
            },
            {
              "lessThan": "f05a0191b90156e539cccc189b9d87ca2a4d9305",
              "status": "affected",
              "version": "2a9bf3d011303d8da64cd5e0e7fdd95f0c143984",
              "versionType": "git"
            },
            {
              "lessThan": "b291d147d0268e93ad866f8bc820ea14497abc9b",
              "status": "affected",
              "version": "2a9bf3d011303d8da64cd5e0e7fdd95f0c143984",
              "versionType": "git"
            },
            {
              "lessThan": "16bcbfb56d759c25665f786e33ec633b9508a08f",
              "status": "affected",
              "version": "2a9bf3d011303d8da64cd5e0e7fdd95f0c143984",
              "versionType": "git"
            },
            {
              "lessThan": "c097bd5a59162156d9c2077a2f58732ffbaa9fca",
              "status": "affected",
              "version": "2a9bf3d011303d8da64cd5e0e7fdd95f0c143984",
              "versionType": "git"
            },
            {
              "lessThan": "814d3610c4ce86e8cf285b2cdac0057a42e82de5",
              "status": "affected",
              "version": "2a9bf3d011303d8da64cd5e0e7fdd95f0c143984",
              "versionType": "git"
            },
            {
              "lessThan": "99154581b05c8fb22607afb7c3d66c1bace6aa5d",
              "status": "affected",
              "version": "2a9bf3d011303d8da64cd5e0e7fdd95f0c143984",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/scsi/lpfc/lpfc_sli.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.36"
            },
            {
              "lessThan": "2.6.36",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.4.*",
              "status": "unaffected",
              "version": "4.4.293",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.291",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.256",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.218",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.162",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.82",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.16",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.4.293",
                  "versionStartIncluding": "2.6.36",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.9.291",
                  "versionStartIncluding": "2.6.36",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.256",
                  "versionStartIncluding": "2.6.36",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.218",
                  "versionStartIncluding": "2.6.36",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.162",
                  "versionStartIncluding": "2.6.36",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.82",
                  "versionStartIncluding": "2.6.36",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.5",
                  "versionStartIncluding": "2.6.36",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.16",
                  "versionStartIncluding": "2.6.36",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: lpfc: Fix list_add() corruption in lpfc_drain_txq()\n\nWhen parsing the txq list in lpfc_drain_txq(), the driver attempts to pass\nthe requests to the adapter. If such an attempt fails, a local \"fail_msg\"\nstring is set and a log message output.  The job is then added to a\ncompletions list for cancellation.\n\nProcessing of any further jobs from the txq list continues, but since\n\"fail_msg\" remains set, jobs are added to the completions list regardless\nof whether a wqe was passed to the adapter.  If successfully added to\ntxcmplq, jobs are added to both lists resulting in list corruption.\n\nFix by clearing the fail_msg string after adding a job to the completions\nlist. This stops the subsequent jobs from being added to the completions\nlist unless they had an appropriate failure."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - lpfc_drain_txq drains deferred ELS IOCBs on the Emulex FC HBA ELS ring; an adjacent FC/FCoE SAN fabric peer can induce discovery/ELS congestion that queues and drains those jobs, matching other lpfc adjacent-fabric scores.\nAC:L - A fabric attacker can flood ELS/discovery to exhaust SGLs (building a multi-job txq) and fill the WQ so one submit fails then later jobs succeed in the same drain; the sticky fail_msg bug then fires without relying on an uncontrollable memory layout.\nPR:N - The path runs in HBA/worker context on fabric-driven ELS traffic with no host authentication or capabilities required of the SAN peer.\nUI:N - ELS deferral and txq drain run automatically during fabric discovery and link events; no local user action is required.\nS:U - List corruption and resulting UAF stay inside the host kernel lpfc heap under the same OS authority; no VM escape or IOMMU/DMA boundary is crossed.\nC:H - Successfully submitted iocbqs are wrongly list_add\u0027d onto completions while still on txcmplq, yielding list corruption and UAF of iocbq objects (including via iocbq_lookup on HW completion), enabling reclaim-assisted arbitrary read.\nI:H - Cancel invokes cmd_cmpl on the double-listed iocbq while HW completion still references it, producing a UAF with a callable function pointer suitable for heap grooming and control-flow hijack.\nA:H - Corrupted list walks and the subsequent UAF cause kernel oops/panic (or hangs under list corruption), fully denying host and FC storage-path availability."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:46:43.456Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ad4776b5eb2e58af1226847fcd3b4f6d051674dd"
        },
        {
          "url": "https://git.kernel.org/stable/c/ec70d80a8642900086447ba0cdc79e3f44d42e8f"
        },
        {
          "url": "https://git.kernel.org/stable/c/f05a0191b90156e539cccc189b9d87ca2a4d9305"
        },
        {
          "url": "https://git.kernel.org/stable/c/b291d147d0268e93ad866f8bc820ea14497abc9b"
        },
        {
          "url": "https://git.kernel.org/stable/c/16bcbfb56d759c25665f786e33ec633b9508a08f"
        },
        {
          "url": "https://git.kernel.org/stable/c/c097bd5a59162156d9c2077a2f58732ffbaa9fca"
        },
        {
          "url": "https://git.kernel.org/stable/c/814d3610c4ce86e8cf285b2cdac0057a42e82de5"
        },
        {
          "url": "https://git.kernel.org/stable/c/99154581b05c8fb22607afb7c3d66c1bace6aa5d"
        }
      ],
      "title": "scsi: lpfc: Fix list_add() corruption in lpfc_drain_txq()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47203",
    "datePublished": "2024-04-10T18:56:37.066Z",
    "dateReserved": "2024-03-25T09:12:14.117Z",
    "dateUpdated": "2026-08-05T08:46:43.456Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-47203",
      "date": "2026-08-27",
      "epss": "0.00343",
      "percentile": "0.26977"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47203\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-10T19:15:48.217\",\"lastModified\":\"2026-08-04T10:16:52.533\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nscsi: lpfc: Fix list_add() corruption in lpfc_drain_txq()\\n\\nWhen parsing the txq list in lpfc_drain_txq(), the driver attempts to pass\\nthe requests to the adapter. If such an attempt fails, a local \\\"fail_msg\\\"\\nstring is set and a log message output.  The job is then added to a\\ncompletions list for cancellation.\\n\\nProcessing of any further jobs from the txq list continues, but since\\n\\\"fail_msg\\\" remains set, jobs are added to the completions list regardless\\nof whether a wqe was passed to the adapter.  If successfully added to\\ntxcmplq, jobs are added to both lists resulting in list corruption.\\n\\nFix by clearing the fail_msg string after adding a job to the completions\\nlist. This stops the subsequent jobs from being added to the completions\\nlist unless they had an appropriate failure.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: scsi: lpfc: Se corrige la corrupci\u00f3n de list_add() en lpfc_drain_txq() Al analizar la lista txq en lpfc_drain_txq(), el controlador intenta pasar las solicitudes al adaptador. Si dicho intento falla, se establece una cadena \\\"fail_msg\\\" local y se genera un mensaje de registro. Luego, el trabajo se agrega a una lista de finalizaciones para su cancelaci\u00f3n. El procesamiento de cualquier otro trabajo de la lista txq contin\u00faa, pero como \\\"fail_msg\\\" permanece establecido, los trabajos se agregan a la lista de finalizaciones independientemente de si se pas\u00f3 un wqe al adaptador. Si se agrega correctamente a txcmplq, los trabajos se agregan a ambas listas, lo que da como resultado la corrupci\u00f3n de la lista. Se soluciona borrando la cadena fail_msg despu\u00e9s de agregar un trabajo a la lista de finalizaciones. Esto evita que los trabajos posteriores se agreguen a la lista de finalizaciones a menos que hayan tenido una falla apropiada.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/scsi/lpfc/lpfc_sli.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2a9bf3d011303d8da64cd5e0e7fdd95f0c143984\",\"lessThan\":\"ad4776b5eb2e58af1226847fcd3b4f6d051674dd\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2a9bf3d011303d8da64cd5e0e7fdd95f0c143984\",\"lessThan\":\"ec70d80a8642900086447ba0cdc79e3f44d42e8f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2a9bf3d011303d8da64cd5e0e7fdd95f0c143984\",\"lessThan\":\"f05a0191b90156e539cccc189b9d87ca2a4d9305\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2a9bf3d011303d8da64cd5e0e7fdd95f0c143984\",\"lessThan\":\"b291d147d0268e93ad866f8bc820ea14497abc9b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2a9bf3d011303d8da64cd5e0e7fdd95f0c143984\",\"lessThan\":\"16bcbfb56d759c25665f786e33ec633b9508a08f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2a9bf3d011303d8da64cd5e0e7fdd95f0c143984\",\"lessThan\":\"c097bd5a59162156d9c2077a2f58732ffbaa9fca\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2a9bf3d011303d8da64cd5e0e7fdd95f0c143984\",\"lessThan\":\"814d3610c4ce86e8cf285b2cdac0057a42e82de5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2a9bf3d011303d8da64cd5e0e7fdd95f0c143984\",\"lessThan\":\"99154581b05c8fb22607afb7c3d66c1bace6aa5d\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/scsi/lpfc/lpfc_sli.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.36\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.36\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.4.293\",\"lessThanOrEqual\":\"4.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.9.291\",\"lessThanOrEqual\":\"4.9.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.14.256\",\"lessThanOrEqual\":\"4.14.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.19.218\",\"lessThanOrEqual\":\"4.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.162\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.82\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.5\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.16\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":8.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":5.9},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-04-10T19:44:44.009129Z\",\"id\":\"CVE-2021-47203\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-787\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"4.4.293\",\"matchCriteriaId\":\"83024F84-4857-4CAF-957E-C14804BAC4AF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.5\",\"versionEndExcluding\":\"4.9.291\",\"matchCriteriaId\":\"8B1EE39E-FE30-4B7D-A26F-631135BCBB3F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.10\",\"versionEndExcluding\":\"4.14.256\",\"matchCriteriaId\":\"FCEB92FF-21BF-4F75-ACA1-6AE1D51A79FC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.15\",\"versionEndExcluding\":\"4.19.218\",\"matchCriteriaId\":\"4F85F433-5DEA-47D3-B07E-3B1AC474D6E0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20\",\"versionEndExcluding\":\"5.4.162\",\"matchCriteriaId\":\"51A152D8-D5CE-47BD-9041-DEE164DCE99D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.82\",\"matchCriteriaId\":\"AE501832-500C-4EF1-9489-5C13674F619D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.5\",\"matchCriteriaId\":\"2128A085-4C0C-4C1E-9E9C-0DD868E2170F\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/16bcbfb56d759c25665f786e33ec633b9508a08f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/814d3610c4ce86e8cf285b2cdac0057a42e82de5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/99154581b05c8fb22607afb7c3d66c1bace6aa5d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ad4776b5eb2e58af1226847fcd3b4f6d051674dd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b291d147d0268e93ad866f8bc820ea14497abc9b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c097bd5a59162156d9c2077a2f58732ffbaa9fca\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ec70d80a8642900086447ba0cdc79e3f44d42e8f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f05a0191b90156e539cccc189b9d87ca2a4d9305\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/16bcbfb56d759c25665f786e33ec633b9508a08f\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/814d3610c4ce86e8cf285b2cdac0057a42e82de5\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/99154581b05c8fb22607afb7c3d66c1bace6aa5d\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ad4776b5eb2e58af1226847fcd3b4f6d051674dd\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b291d147d0268e93ad866f8bc820ea14497abc9b\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c097bd5a59162156d9c2077a2f58732ffbaa9fca\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ec70d80a8642900086447ba0cdc79e3f44d42e8f\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f05a0191b90156e539cccc189b9d87ca2a4d9305\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-04T20:02:40+00:00",
      "cve": "CVE-2021-47203",
      "id": "CVE-2021-47203",
      "initial_release_date": "2021-01-01T00:00:00+00:00",
      "product_status:fixed": "120",
      "product_status:known_affected": "58",
      "product_status:known_not_affected": "108",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: scsi: lpfc: Fix list_add() corruption in lpfc_drain_txq()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-47203.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/ad4776b5eb2e58af1226847fcd3b4f6d051674dd\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/ec70d80a8642900086447ba0cdc79e3f44d42e8f\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/f05a0191b90156e539cccc189b9d87ca2a4d9305\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/b291d147d0268e93ad866f8bc820ea14497abc9b\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/16bcbfb56d759c25665f786e33ec633b9508a08f\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/c097bd5a59162156d9c2077a2f58732ffbaa9fca\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/814d3610c4ce86e8cf285b2cdac0057a42e82de5\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/99154581b05c8fb22607afb7c3d66c1bace6aa5d\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:32:07.414Z\"}}, {\"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47203\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-04-10T19:44:44.009129Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-05-23T19:01:23.100Z\"}, \"title\": \"CISA ADP Vulnrichment\"}], \"cna\": {\"title\": \"scsi: lpfc: Fix list_add() corruption in lpfc_drain_txq()\", \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 8.8, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"AV:A - lpfc_drain_txq drains deferred ELS IOCBs on the Emulex FC HBA ELS ring; an adjacent FC/FCoE SAN fabric peer can induce discovery/ELS congestion that queues and drains those jobs, matching other lpfc adjacent-fabric scores.\\nAC:L - A fabric attacker can flood ELS/discovery to exhaust SGLs (building a multi-job txq) and fill the WQ so one submit fails then later jobs succeed in the same drain; the sticky fail_msg bug then fires without relying on an uncontrollable memory layout.\\nPR:N - The path runs in HBA/worker context on fabric-driven ELS traffic with no host authentication or capabilities required of the SAN peer.\\nUI:N - ELS deferral and txq drain run automatically during fabric discovery and link events; no local user action is required.\\nS:U - List corruption and resulting UAF stay inside the host kernel lpfc heap under the same OS authority; no VM escape or IOMMU/DMA boundary is crossed.\\nC:H - Successfully submitted iocbqs are wrongly list_add\u0027d onto completions while still on txcmplq, yielding list corruption and UAF of iocbq objects (including via iocbq_lookup on HW completion), enabling reclaim-assisted arbitrary read.\\nI:H - Cancel invokes cmd_cmpl on the double-listed iocbq while HW completion still references it, producing a UAF with a callable function pointer suitable for heap grooming and control-flow hijack.\\nA:H - Corrupted list walks and the subsequent UAF cause kernel oops/panic (or hangs under list corruption), fully denying host and FC storage-path availability.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2a9bf3d011303d8da64cd5e0e7fdd95f0c143984\", \"lessThan\": \"ad4776b5eb2e58af1226847fcd3b4f6d051674dd\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2a9bf3d011303d8da64cd5e0e7fdd95f0c143984\", \"lessThan\": \"ec70d80a8642900086447ba0cdc79e3f44d42e8f\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2a9bf3d011303d8da64cd5e0e7fdd95f0c143984\", \"lessThan\": \"f05a0191b90156e539cccc189b9d87ca2a4d9305\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2a9bf3d011303d8da64cd5e0e7fdd95f0c143984\", \"lessThan\": \"b291d147d0268e93ad866f8bc820ea14497abc9b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2a9bf3d011303d8da64cd5e0e7fdd95f0c143984\", \"lessThan\": \"16bcbfb56d759c25665f786e33ec633b9508a08f\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2a9bf3d011303d8da64cd5e0e7fdd95f0c143984\", \"lessThan\": \"c097bd5a59162156d9c2077a2f58732ffbaa9fca\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2a9bf3d011303d8da64cd5e0e7fdd95f0c143984\", \"lessThan\": \"814d3610c4ce86e8cf285b2cdac0057a42e82de5\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2a9bf3d011303d8da64cd5e0e7fdd95f0c143984\", \"lessThan\": \"99154581b05c8fb22607afb7c3d66c1bace6aa5d\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/scsi/lpfc/lpfc_sli.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.36\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.36\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.4.293\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.4.*\"}, {\"status\": \"unaffected\", \"version\": \"4.9.291\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.9.*\"}, {\"status\": \"unaffected\", \"version\": \"4.14.256\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.218\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.162\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.82\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.5\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"5.16\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/scsi/lpfc/lpfc_sli.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/ad4776b5eb2e58af1226847fcd3b4f6d051674dd\"}, {\"url\": \"https://git.kernel.org/stable/c/ec70d80a8642900086447ba0cdc79e3f44d42e8f\"}, {\"url\": \"https://git.kernel.org/stable/c/f05a0191b90156e539cccc189b9d87ca2a4d9305\"}, {\"url\": \"https://git.kernel.org/stable/c/b291d147d0268e93ad866f8bc820ea14497abc9b\"}, {\"url\": \"https://git.kernel.org/stable/c/16bcbfb56d759c25665f786e33ec633b9508a08f\"}, {\"url\": \"https://git.kernel.org/stable/c/c097bd5a59162156d9c2077a2f58732ffbaa9fca\"}, {\"url\": \"https://git.kernel.org/stable/c/814d3610c4ce86e8cf285b2cdac0057a42e82de5\"}, {\"url\": \"https://git.kernel.org/stable/c/99154581b05c8fb22607afb7c3d66c1bace6aa5d\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nscsi: lpfc: Fix list_add() corruption in lpfc_drain_txq()\\n\\nWhen parsing the txq list in lpfc_drain_txq(), the driver attempts to pass\\nthe requests to the adapter. If such an attempt fails, a local \\\"fail_msg\\\"\\nstring is set and a log message output.  The job is then added to a\\ncompletions list for cancellation.\\n\\nProcessing of any further jobs from the txq list continues, but since\\n\\\"fail_msg\\\" remains set, jobs are added to the completions list regardless\\nof whether a wqe was passed to the adapter.  If successfully added to\\ntxcmplq, jobs are added to both lists resulting in list corruption.\\n\\nFix by clearing the fail_msg string after adding a job to the completions\\nlist. This stops the subsequent jobs from being added to the completions\\nlist unless they had an appropriate failure.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.4.293\", \"versionStartIncluding\": \"2.6.36\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.9.291\", \"versionStartIncluding\": \"2.6.36\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.256\", \"versionStartIncluding\": \"2.6.36\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.218\", \"versionStartIncluding\": \"2.6.36\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.162\", \"versionStartIncluding\": \"2.6.36\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.82\", \"versionStartIncluding\": \"2.6.36\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.5\", \"versionStartIncluding\": \"2.6.36\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.16\", \"versionStartIncluding\": \"2.6.36\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T08:46:43.456Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47203\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T08:46:43.456Z\", \"dateReserved\": \"2024-03-25T09:12:14.117Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-04-10T18:56:37.066Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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

Author Source Type Date Other

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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.