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CVE-2022-50554

Estado: AnalizadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

blk-mq: avoid double ->queue_rq() because of early timeout

David Jeffery found one double ->queue_rq() issue, so far it can be triggered in VM use case because of long vmexit latency or preempt latency of vCPU pthread or long page fault in vCPU pthread, then block IO req could be timed out before queuing the request to hardware but after calling blk_mq_start_request() during ->queue_rq(), then timeout handler may handle it by requeue, then double ->queue_rq() is caused, and kernel panic.

So far, it is driver's responsibility to cover the race between timeout and completion, so it seems supposed to be solved in driver in theory, given driver has enough knowledge.

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But it is really one common problem, lots of driver could have similar issue, and could be hard to fix all affected drivers, even it isn't easy for driver to handle the race. So David suggests this patch by draining in-progress ->queue_rq() for solving this issue.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2022-50554",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
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          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
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  "published": "2025-10-07T16:15:43.423",
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-mq: avoid double ->queue_rq() because of early timeout\n\nDavid Jeffery found one double ->queue_rq() issue, so far it can\nbe triggered in VM use case because of long vmexit latency or preempt\nlatency of vCPU pthread or long page fault in vCPU pthread, then block\nIO req could be timed out before queuing the request to hardware but after\ncalling blk_mq_start_request() during ->queue_rq(), then timeout handler\nmay handle it by requeue, then double ->queue_rq() is caused, and kernel\npanic.\n\nSo far, it is driver's responsibility to cover the race between timeout\nand completion, so it seems supposed to be solved in driver in theory,\ngiven driver has enough knowledge.\n\nBut it is really one common problem, lots of driver could have similar\nissue, and could be hard to fix all affected drivers, even it isn't easy\nfor driver to handle the race. So David suggests this patch by draining\nin-progress ->queue_rq() for solving this issue."
    }
  ],
  "lastModified": "2026-06-17T05:23:46.967",
  "configurations": [
    {
      "nodes": [
        {
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          "operator": "OR"
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}