fkie_cve-2021-47203
Vulnerability from fkie_nvd
Published
2024-04-10 19:15
Modified
2025-03-27 21:15
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: 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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/16bcbfb56d759c25665f786e33ec633b9508a08fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/814d3610c4ce86e8cf285b2cdac0057a42e82de5Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/99154581b05c8fb22607afb7c3d66c1bace6aa5dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ad4776b5eb2e58af1226847fcd3b4f6d051674ddPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b291d147d0268e93ad866f8bc820ea14497abc9bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c097bd5a59162156d9c2077a2f58732ffbaa9fcaPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ec70d80a8642900086447ba0cdc79e3f44d42e8fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f05a0191b90156e539cccc189b9d87ca2a4d9305Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/16bcbfb56d759c25665f786e33ec633b9508a08fPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/814d3610c4ce86e8cf285b2cdac0057a42e82de5Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/99154581b05c8fb22607afb7c3d66c1bace6aa5dPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ad4776b5eb2e58af1226847fcd3b4f6d051674ddPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b291d147d0268e93ad866f8bc820ea14497abc9bPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c097bd5a59162156d9c2077a2f58732ffbaa9fcaPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ec70d80a8642900086447ba0cdc79e3f44d42e8fPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f05a0191b90156e539cccc189b9d87ca2a4d9305Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
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  ],
  "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."
    }
  ],
  "id": "CVE-2021-47203",
  "lastModified": "2025-03-27T21:15:41.670",
  "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"
      }
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  "published": "2024-04-10T19:15:48.217",
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-787"
        }
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      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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