CVE-2025-40146 (GCVE-0-2025-40146)

Vulnerability from cvelistv5 – Published: 2025-11-12 10:23 – Updated: 2026-05-11 21:43
VLAI
Title
blk-mq: fix potential deadlock while nr_requests grown
Summary
In the Linux kernel, the following vulnerability has been resolved: blk-mq: fix potential deadlock while nr_requests grown Allocate and free sched_tags while queue is freezed can deadlock[1], this is a long term problem, hence allocate memory before freezing queue and free memory after queue is unfreezed. [1] https://lore.kernel.org/all/0659ea8d-a463-47c8-9180-43c719e106eb@linux.ibm.com/
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: e3a2b3f931f59d5284abd13faf8bded726884ffd , < 8d26acf8477174d8ef690eb6affe13a630f586ae (git)
Affected: e3a2b3f931f59d5284abd13faf8bded726884ffd , < b86433721f46d934940528f28d49c1dedb690df1 (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.16
Unaffected: 0 , < 3.16 (semver)
Unaffected: 6.17.3 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "block/blk-mq.c",
            "block/blk-mq.h",
            "block/blk-sysfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "8d26acf8477174d8ef690eb6affe13a630f586ae",
              "status": "affected",
              "version": "e3a2b3f931f59d5284abd13faf8bded726884ffd",
              "versionType": "git"
            },
            {
              "lessThan": "b86433721f46d934940528f28d49c1dedb690df1",
              "status": "affected",
              "version": "e3a2b3f931f59d5284abd13faf8bded726884ffd",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "block/blk-mq.c",
            "block/blk-mq.h",
            "block/blk-sysfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.16"
            },
            {
              "lessThan": "3.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17.3",
                  "versionStartIncluding": "3.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18",
                  "versionStartIncluding": "3.16",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-mq: fix potential deadlock while nr_requests grown\n\nAllocate and free sched_tags while queue is freezed can deadlock[1],\nthis is a long term problem, hence allocate memory before freezing\nqueue and free memory after queue is unfreezed.\n\n[1] https://lore.kernel.org/all/0659ea8d-a463-47c8-9180-43c719e106eb@linux.ibm.com/"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:43:37.672Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/8d26acf8477174d8ef690eb6affe13a630f586ae"
        },
        {
          "url": "https://git.kernel.org/stable/c/b86433721f46d934940528f28d49c1dedb690df1"
        }
      ],
      "title": "blk-mq: fix potential deadlock while nr_requests grown",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40146",
    "datePublished": "2025-11-12T10:23:26.287Z",
    "dateReserved": "2025-04-16T07:20:57.175Z",
    "dateUpdated": "2026-05-11T21:43:37.672Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-40146",
      "date": "2026-09-28",
      "epss": "0.00225",
      "percentile": "0.11893"
    },
    "microsoft_vex": {
      "current_release_date": "2026-09-24T02:47:04.000Z",
      "cve": "CVE-2025-40146",
      "id": "msrc_CVE-2025-40146",
      "initial_release_date": "2025-11-13T01:02:24.000Z",
      "product_status:known_affected": "18",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "blk-mq: fix potential deadlock while nr_requests grown",
      "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-40146.json",
      "version": "20"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "block/blk-mq.c",
                  "block/blk-mq.h",
                  "block/blk-sysfs.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "8d26acf8477174d8ef690eb6affe13a630f586ae",
                    "status": "affected",
                    "version": "e3a2b3f931f59d5284abd13faf8bded726884ffd",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "b86433721f46d934940528f28d49c1dedb690df1",
                    "status": "affected",
                    "version": "e3a2b3f931f59d5284abd13faf8bded726884ffd",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "block/blk-mq.c",
                  "block/blk-mq.h",
                  "block/blk-sysfs.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "3.16"
                  },
                  {
                    "lessThan": "3.16",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.17.*",
                    "status": "unaffected",
                    "version": "6.17.3",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "6.18",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-mq: fix potential deadlock while nr_requests grown\n\nAllocate and free sched_tags while queue is freezed can deadlock[1],\nthis is a long term problem, hence allocate memory before freezing\nqueue and free memory after queue is unfreezed.\n\n[1] https://lore.kernel.org/all/0659ea8d-a463-47c8-9180-43c719e106eb@linux.ibm.com/"
          }
        ],
        "id": "CVE-2025-40146",
        "lastModified": "2026-06-17T09:21:20.207",
        "metrics": {},
        "published": "2025-11-12T11:15:44.480",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/8d26acf8477174d8ef690eb6affe13a630f586ae"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/b86433721f46d934940528f28d49c1dedb690df1"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Deferred"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-30T10:34:23+00:00",
      "cve": "CVE-2025-40146",
      "id": "CVE-2025-40146",
      "initial_release_date": "2025-11-12T00:00:00+00:00",
      "product_status:known_affected": "260",
      "product_status:known_not_affected": "14",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: blk-mq: fix potential deadlock while nr_requests grown",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-40146.json",
      "version": "3"
    }
  }
}



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.



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.