CVE-2021-47498 (GCVE-0-2021-47498)

Vulnerability from cvelistv5 – Published: 2024-05-22 08:19 – Updated: 2026-05-11 13:55
VLAI
Title
dm rq: don't queue request to blk-mq during DM suspend
Summary
In the Linux kernel, the following vulnerability has been resolved: dm rq: don't queue request to blk-mq during DM suspend DM uses blk-mq's quiesce/unquiesce to stop/start device mapper queue. But blk-mq's unquiesce may come from outside events, such as elevator switch, updating nr_requests or others, and request may come during suspend, so simply ask for blk-mq to requeue it. Fixes one kernel panic issue when running updating nr_requests and dm-mpath suspend/resume stress test.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-05-29 17:07 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 7b17c2f7292ba1f3f98dae3f7077f9e569653276 , < 8050652810bf38241edec8717393d2446e8036f1 (git)
Affected: 7b17c2f7292ba1f3f98dae3f7077f9e569653276 , < 8ca9745efe3528feb06ca4e117188038eea2d351 (git)
Affected: 7b17c2f7292ba1f3f98dae3f7077f9e569653276 , < b4459b11e84092658fa195a2587aff3b9637f0e7 (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.10
Unaffected: 0 , < 4.10 (semver)
Unaffected: 5.10.241 , ≤ 5.10.* (semver)
Unaffected: 5.14.14 , ≤ 5.14.* (semver)
Unaffected: 5.15 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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      "status": "interim",
      "title": "SUSE CVE CVE-2021-47498",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-47498.json",
      "version": "68"
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            "title": "CVE Program Container"
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            "metrics": [
              {
                "cvssV3_1": {
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                  "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"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2021-47498",
                    "options": [
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                      },
                      {
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                      },
                      {
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                    "role": "CISA Coordinator",
                    "timestamp": "2024-05-29T17:07:40.388393Z",
                    "version": "2.0.3"
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            ],
            "problemTypes": [
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                    "description": "CWE-noinfo Not enough information",
                    "lang": "en",
                    "type": "CWE"
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            "title": "CISA ADP Vulnrichment"
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              "product": "Linux",
              "programFiles": [
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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                  "lessThanOrEqual": "*",
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                  "versionType": "original_commit_for_fix"
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                  ],
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                  "operator": "OR"
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          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm rq: don\u0027t queue request to blk-mq during DM suspend\n\nDM uses blk-mq\u0027s quiesce/unquiesce to stop/start device mapper queue.\n\nBut blk-mq\u0027s unquiesce may come from outside events, such as elevator\nswitch, updating nr_requests or others, and request may come during\nsuspend, so simply ask for blk-mq to requeue it.\n\nFixes one kernel panic issue when running updating nr_requests and\ndm-mpath suspend/resume stress test."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-12-10T07:12:08.165Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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            },
            {
              "url": "https://git.kernel.org/stable/c/b4459b11e84092658fa195a2587aff3b9637f0e7"
            }
          ],
          "title": "dm rq: don\u0027t queue request to blk-mq during DM suspend",
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          }
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      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2021-47498",
        "datePublished": "2024-05-22T08:19:44.803Z",
        "dateReserved": "2024-05-22T06:20:56.204Z",
        "dateUpdated": "2025-12-10T07:12:08.165Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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

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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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.